O'Reilly Automotive is a Fortune 500 specialty retailer of automotive aftermarket parts, tools, supplies, equipment, and accessories serving both do-it-yours...
O-RAN supports the Open Radio Access Network architecture under the Linux Foundation for more interoperable and virtualized mobile network infrastructure. It...
o1 Labs (o1Labs) is a zero-knowledge cryptography company and the incubator of Mina Protocol, a lightweight blockchain that stays a constant ~22KB using recu...
O11 is a Y Combinator (Winter 2026) startup building custom AI software for financial services firms. Rather than forcing teams onto a new external platform,...
o9 Solutions is an enterprise AI platform for integrated planning and decision-making, founded in 2009 by Sanjiv Sidhu (previously founder of i2 Technologies...
Oak is an AI-native identity operating system that governs human, machine, and AI-agent identities from a single platform. Its Identity Intelligence Layer un...
Oak Ridge National Laboratory (ORNL) is the largest US Department of Energy science and energy laboratory. ORNL provides public data and scientific computing...
OakNorth is a UK-based commercial bank and business-lending institution founded in 2015, providing debt financing to mid-market and lower-mid-market business...
Oaktree Capital Group is a global asset management firm specializing in alternative investment strategies including credit, private equity, real assets, and ...
OANDA is a forex and CFD trading broker offering REST APIs for live and practice trading. The v20 REST API provides access to real-time forex rates, order ma...
OAO RBC Information Systems (MICEX:RBCI) is a company surfaced as a portfolio company of insight-partners and added to the API Evangelist network as a stub f...
oapi-codegen is an open source Go code generator that produces client and server boilerplate from OpenAPI 3.0 and 3.1 specifications with support for Echo, C...
Oasis Security is a Non-Human Identity (NHI) management and security platform for hybrid and multi-cloud environments. Its Agentic Access Management (AAM) of...
Oasis Health Partners is a company surfaced as a portfolio company of gv and added to the API Evangelist network as a stub for enrichment. Sector: life-scien...
Oasis Labs builds privacy-preserving data and compute technologies. Its developer platform, Parcel, is a data-governance API for uploading, tokenizing, and c...
Oasis Petroleum was an independent exploration and production (E&P) company focused on unconventional crude oil and natural gas resources in the Williston Ba...
Oasis Security is an enterprise Non-Human Identity Management (NHIM) and agentic access management platform that discovers, governs, and secures non-human id...
OatFi is a fintech infrastructure company that describes itself as "The Modern Credit Network for B2B Payments." It provides embedded credit, lending, and wo...
Oatside is a Southeast Asian oat milk brand founded in Singapore in 2020 by Benedict Lim, operating as one of Asia's only "full-stack" plant-milk companies —...
OAuth is an open authorization framework that enables third-party applications to access user resources without exposing credentials. It provides a secure, t...
OB1 was the venture-backed company that built and stewarded OpenBazaar, a fully decentralized, peer-to-peer marketplace protocol for buying and selling goods...
Obie is a company surfaced as a portfolio company of 500 Global and Battery Ventures and retained in the API Evangelist network as an acquisition/portfolio l...
Object-Oriented Programming (OOP) is a software development paradigm that organizes software design around data, or objects, rather than functions and logic....
ObjectBox is a high-performance, low-footprint, offline-first on-device database with built-in data synchronization and on-device vector search, designed for...
Oblenio Bio is a clinical-stage biotechnology company developing tri-specific antibody immunotherapies for refractory autoimmune diseases. Its lead candidate...
Obligate (formerly FQX) is a Swiss digital-securities infrastructure provider for regulated on-chain debt capital markets. Its AssetOS platform lets companie...
Oblix Inc. is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile is a lea...
Oboe is an AI-powered learning platform whose mission is to teach one billion people one trillion things. Positioned as "AI that won't make you stupid," it l...
Obol builds distributed validator infrastructure for Ethereum, letting a validator be run across multiple independent operators and machines (a Distributed V...
Obot AI (formerly Acorn Labs) builds an open-source MCP Gateway and platform that gives organizations a central control point for Model Context Protocol (MCP...
Observable is a data-exploration, analysis, and visualization platform that helps data analysts and their cross-functional stakeholders make sense of data. I...
Observe.AI is a contact center artificial intelligence platform that deploys purpose-built AI agents across voice and chat to resolve customer inquiries end-...
Observe.AI is an agentic AI platform for the contact center, providing purpose-built AI agents that handle customer support end-to-end across voice and chat,...
ObserveIT was an insider threat management (ITM) vendor acquired by Proofpoint in 2019 and folded into the Proofpoint Insider Threat Management product line ...
ObservePoint is a web governance and digital data-quality platform that automatically scans websites, mobile web properties and email links to validate analy...
Observo AI built an AI-native data pipeline (telemetry pipeline) platform that optimizes security and observability data in flight, filtering, enriching, and...
Observo AI was an AI-powered data pipeline platform for observability and security telemetry. Its product reduced log and event volume (filtering low-value d...
Obsidian is a local-first knowledge base and note-taking app built on plain Markdown files. Obsidian itself does not publish a hosted SaaS API; programmatic ...
Obsidian Therapeutics is a clinical-stage biotechnology company developing engineered cell and gene therapies built on its proprietary cytoDRiVE platform, wh...
Obvio is an AI-powered traffic-safety platform that helps cities and police departments detect and enforce reckless driving. Its context-aware computer-visio...
Obvious Ventures is a San Francisco-based early-stage venture capital firm founded in 2014 by Ev Williams, James Joaquin, and Vishal Vasishth, investing in e...
Occam Networks was a broadband access equipment vendor that developed and marketed systems enabling telecommunications carriers to profitably deliver emergin...
Occidental Petroleum is an international oil and gas exploration and production company with operations in the United States, Middle East, Africa, and Latin ...
Occipital is a computer-vision and 3D-scanning company known for the Structure Sensor depth camera and the Canvas home-scanning app, built on more than fifte...
The Occupational Safety and Health Administration (OSHA) is a US federal agency that sets and enforces standards for safe and healthful working conditions. O...
Ocean Aero is a Gulfport, Mississippi maritime robotics manufacturer that designs, builds and operates the Triton, an environmentally powered Autonomous Unde...
Ocean Health Systems (legally Ocean Informatics Pty Ltd, founded 1998, with offices in Bundall QLD, Chatswood NSW and London) is the Australian clinical-info...
Ocean Network Express (ONE) is a Singapore-headquartered global container liner shipping company formed in 2017 through the integration of the container ship...
Ocean.io is a B2B go-to-market data platform built around lookalike intelligence: give it a domain or a set of closed-won customers and it returns the most s...
Oceaneering International is a global provider of engineered services and products primarily to the offshore oil and gas industry, with a focus on deepwater ...
Oceans Healthcare is a behavioral health system operating a network of psychiatric hospitals and outpatient programs across the southern United States. Found...
oceg is a company surfaced as a portfolio company of qiming and added to the API Evangelist network as a stub for enrichment. This profile is a lead awaiting...
Ocelot is an open-source API Gateway built with .NET for microservices architectures. It provides routing, authentication, rate limiting, load balancing, and...
OCI (Open Container Initiative) is an open governance structure for creating open industry standards around container formats and runtimes. OCI defines stand...
Ocient is a Chicago-based data platform company founded in 2016 that builds OcientAIQ, a unified data platform for petabyte-scale analytics and production AI...
The Discovery API allows you to surface both WorldCat and WorldCat Discovery central index data in search results, including: Materials held by your library ...
OCRA (OATH Challenge-Response Algorithm) is a standard for generating one-time passwords based on challenge-response authentication as defined in RFC 6287. I...
Ocrolus is a fintech document-automation and analytics platform that helps lenders analyze financial documents - bank statements, pay stubs, tax forms and mo...
OCSiAl is a Luxembourg-headquartered advanced-materials manufacturer and the world's largest industrial producer of single wall carbon nanotubes (graphene na...
Octa is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile is a lead awai...
Octagos Health is a Houston, Texas based digital health company providing an AI-assisted cardiac remote monitoring platform for cardiology practices, electro...
Usage-based pricing and monetization platform with a REST API for managing meters, pricing plans, customer entitlements, and real-time usage tracking for Saa...
Octane AI is an AI-powered quiz and product-recommendation platform for Shopify merchants, turning storefront browsers into buyers with no-code personalized ...
Octane (Octane Lending, Inc.) is a New York City fintech founded in 2014 that makes powersports, outdoor power equipment and recreational-vehicle financing a...
Octant is a precision medicine company developing next-generation small molecule therapeutics by merging biology, chemistry, and computation to engineer drug...
Octant (Octant Bio) is a precision-medicine and therapeutics company based in Emeryville, California, founded by Sri Kosuri and Ramsey Homsany. Octant engine...
Octapulse (OctaPulse) is a Y Combinator (Winter 2026) startup applying computer vision and robotics to automate quality inspection in finfish farms. Its AI v...
Octarine was a cloud-native application security startup that built a security platform for Kubernetes and service-mesh environments, providing runtime visib...
Octarine Labs is a company surfaced as a portfolio company of battery-ventures and added to the API Evangelist network as a stub for enrichment. This profile...
Octave (Octave Online Therapy) is a modern behavioral and mental health company providing personalized, evidence-based therapy — individual, couples, and fam...
Octave Bioscience is a precision neurology company founded in 2014 and headquartered in Menlo Park, California, that develops blood-based multi-protein bioma...
Octave Wealth (octavewealth.com) is a Y Combinator-backed company that, based on its name and branding, operates in the wealth and personal-finance space. It...
OctoAI (formerly OctoML) was a Seattle-based AI inference platform founded in 2019 as a University of Washington Allen School spin-out of the Apache TVM proj...
Octobat is a billing, invoicing, and tax-compliance platform for online businesses. It automates the creation, delivery, and storage of legally compliant inv...
Octoparse is a powerful web scraping tool that allows users to extract data from websites without any coding knowledge. The platform uses advanced algorithms...
Octopus Deploy is a continuous delivery and release orchestration platform for managing deployments across development, test, and production environments to ...
Octopus Energy is a UK-founded retail energy supplier and the parent of Kraken Technologies, the AI-powered energy operating system that runs both Octopus an...
The OCUDU Ecosystem Foundation is a Linux Foundation project announced at MWC Barcelona in March 2026. It is an open collaboration hub dedicated to building ...
Oculus is the virtual-reality company founded in 2012 that Kickstarter-launched the Rift headset and was backed by Spark Capital, Matrix Partners and others ...
Oculus VR is the pioneering virtual reality company founded in 2012 and acquired by Facebook (now Meta) in 2014. Its Rift, Go, and Quest headsets defined con...
Ocwen Financial Corporation is a leading non-bank mortgage servicer and originator providing solutions through its primary brands PHH Mortgage and Liberty Re...
ODAIA is a commercial intelligence platform for the pharmaceutical industry, using AI to replace manual analysis and static annual segmentation with real-tim...
Odaseva is an enterprise data security, backup, and governance platform purpose-built for large, complex Salesforce environments. It provides data backup and...
OData (Open Data Protocol) is an OASIS standard that defines best practices for building and consuming RESTful APIs. It enables the creation of query-based d...
Oddcast is a New York-based creative media technology company that builds speaking-character, avatar, and text-to-speech products for agencies, brands, busin...
Oddpool is an institutional-grade data platform for prediction markets, offering unified access to market data across Kalshi and Polymarket through a single ...
OddsJam's Sports Betting API offers real-time betting odds from 100+ sportsbooks including player props, alternate markets, injury data, schedules, rankings,...
Oddup (now operating as Oddup Markets) is a Singapore-based platform founded in 2015 by James Giancotti. It began as a data-driven startup-rating and intelli...
Odeko is a cafe operations platform that keeps independent coffee shops and cafes stocked by combining predictive ordering, overnight supply delivery, and mo...
Odessa is a Philadelphia-headquartered lease and loan management software company founded in 1998 that powers asset finance for banks, captive finance compan...
Odoo is an open-source suite of business applications covering ERP, CRM, eCommerce, accounting, inventory, and more. Odoo provides external APIs for integrat...
Odos is a DEX aggregator and smart order routing platform that uses a sophisticated optimization algorithm to unify fragmented liquidity and maximize the out...
Odyssey is an AI research lab pioneering general-purpose world models — causal, multimodal systems that learn to understand and simulate the world beyond lan...
Odyssey is an AI research lab building general-purpose world models — causal, multimodal systems that understand and simulate physical environments, generati...
Odyssey Interactive is an independent game development studio focused on building free-to-play, cross-platform, competitive titles set in bright, hopeful, an...
Odyssey Therapeutics is a clinical-stage biopharmaceutical company developing small-molecule and biologic therapeutics for autoimmune, inflammatory, and onco...
The OECD provides programmatic access to OECD data through an application programming interface (API) based on the SDMX standard. These APIs are free of char...
Oen (應援科技) is a Taiwan-based fintech company operating an integrated payments and CRM cloud platform. It provides multi-channel payment processing (credit ca...
OfBusiness is one of India's largest B2B raw-materials procurement and credit platforms, serving more than two million SMEs and corporates. It operates as an...
Ofcom is the Office of Communications, the United Kingdom's independent regulator and competition authority for telecommunications, spectrum, broadcasting, p...
Oferteo (oferteo.pl) is a Polish online services marketplace that connects people and businesses seeking services (Zlecający) with local contractors and serv...
OFF (Off-Live, off.live) is an enterprise AI software company building intelligent applications that help organizations streamline, innovate, and grow. Its p...
Off Grid Stores is a US direct-to-consumer retailer of off-grid solar equipment — solar generators and kits, portable and rigid panels, LiFePO4 battery banks...
Offcall is a career and practice platform for physicians, backed by Bloomberg Beta. It provides confidential, anonymous physician salary and compensation ben...
Offchain (formerly Offchain Labs) is a blockchain infrastructure company that builds and maintains core technology for the Ethereum ecosystem. It is the crea...
Offchain Labs (now operating as "Offchain") is the research-and-engineering company behind Arbitrum, one of the leading Ethereum Layer 2 scaling ecosystems, ...
Offchain Labs is the team behind Arbitrum, a suite of Ethereum Layer 2 scaling technologies (Arbitrum One and Arbitrum Nova) built on the Nitro tech stack an...
OffenderList is a comprehensive online platform that provides information about individuals who have been convicted of criminal offenses. The website allows ...
Offenders.io is a technology company that specializes in providing innovative solutions for managing and monitoring offender populations. Their platform util...
A commercial REST API (and private-beta MCP server) for nationwide US sex-offender registry screening, searching 58 US registries through one API with scored...
Offendersearch, Inc. operates a REST API that unifies US sex-offender registry data — all 50 states, the District of Columbia, the US territories and NSOPW, ...
OfferFit is an AI decisioning company whose reinforcement-learning platform automated marketing experimentation and 1:1 personalization (replacing manual A/B...
Offerpad Solutions Inc. (NYSE: OPAD), headquartered in Chandler, Arizona, is a United States iBuyer and licensed residential real estate brokerage that buys ...
OfferUp is a mobile-first local marketplace where people buy and sell items in their community across categories including electronics, vehicles, furniture, ...
Microsoft Office 365 is a cloud-based suite of productivity and collaboration applications that integrates all Microsoft's existing online applications into ...
Office Depot is a leading provider of business products and services delivering workplace solutions through retail stores, e-commerce sites, and a dedicated ...
OfficeLuv is office management and purchasing software that centralizes all of a workplace's ordering into a single platform. It aggregates dozens of vendors...
The Office of Career, Technical, and Adult Education is a government agency that focuses on providing resources and support to individuals seeking to further...
The Office of Child Support Services is a government agency that works to ensure that children receive the financial support they need from their non-custodi...
The Office of Community Oriented Policing Services (COPS Office) is a component of the U.S. Department of Justice that works to advance the practice of commu...
The Office of Congressional Workplace Rights is responsible for enforcing workplace rights for employees of the United States Congress. This includes oversee...
The Office of Fossil Energy and Carbon Management is a division of the U.S. Department of Energy that is focused on addressing the challenges of reducing gre...
The Office of Government Ethics (OGE) is an independent agency within the federal government that oversees the behavior and ethics of executive branch employ...
The Office of Inspector General (OIG) conducts audits, investigations, inspections, and other reviews to promote economy and efficiency in government program...
The Office of the Comptroller of the Currency (OCC) is a federal agency responsible for regulating and supervising national banks and federal savings associa...
The Office of the Comptroller of the Currency (OCC) charters, regulates, and supervises all national banks and federal savings associations, as well as feder...
The Office of the Federal Register is responsible for publishing official government documents. This includes the publication of presidential proclamations, ...
Officebanao is a technology-enabled office interior design and build company headquartered in Gurugram and Bengaluru, India, and founded in 2021. It delivers...
Official Ukrainian Government Portal is a open data portal open-data portal for Ukraine running CKAN. It exposes the CKAN catalog API, a standardized machine...
Offr (Offr.io Ltd) is a Dublin-based property technology (proptech) platform that digitizes end-to-end real estate transactions. Estate and letting agents em...
Ofgem, the Office of Gas and Electricity Markets, is the non-ministerial government department that regulates the gas and electricity markets of Great Britai...
OFI is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile is a lead await...
Ofo (Chinese: 小黄车, "little yellow bike") was a Beijing dockless bicycle-sharing company founded in 2014 by Dai Wei and four classmates from the Peking Univer...
OFX (formerly OzForex) is a global money-transfer and international-payments company that has been moving and managing money globally for over 25 years, trad...
OGE Energy is the parent company of Oklahoma Gas and Electric Company, a regulated electric utility serving customers in Oklahoma and western Arkansas.
Ogen is an Apache-2.0 OpenAPI v3 code generator for Go, maintained by the ogen-go organization. It reads an OpenAPI v3 document at build time and emits a sta...
Ogilvy is a global advertising, marketing, and communications agency network founded by David Ogilvy in 1948 and headquartered in New York City. It is a WPP ...
OGSystems was a geospatial intelligence, data analytics, and advanced technology company based in Chantilly, Virginia, serving the United States intelligence...
Ohalo is a data governance company whose Data X-Ray platform discovers, classifies, redacts, and governs unstructured data across enterprise file systems, da...
Ohalo Genetics is an American agricultural biotechnology company founded in 2019 and led by CEO David Friedberg, developing plant-breeding platforms and prop...
Ohio National (Acquired by Constellation Insurance / Rebranded as AuguStar)
Ohio National Financial Services was a Cincinnati-based mutual life insurance and annuities provider, historically operating through Ohio National Mutual Hol...
The Ohio State University is a large public land-grant research university in Columbus, Ohio, United States. It operates no central developer portal and publ...
Ohloh is the open source directory and analytics service that was rebranded as Black Duck Open Hub (openhub.net) after Black Duck Software acquired it. It tr...
OhmConnect is a residential demand-response and virtual power plant company that turns household electricity flexibility into grid capacity. It alerts custom...
Ohmium International designs, manufactures and deploys modular, vertically-stackable proton exchange membrane (PEM) electrolyzer systems for cost-competitive...
OHMYSYNT is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile is a lead ...
OHouse is a company surfaced as a portfolio company of bond-capital and added to the API Evangelist network as a stub for enrichment. Sector: ecommerce. This...
OpenID Connect (OIDC) is an identity layer built on top of OAuth 2.0 that enables clients to verify the identity of end-users based on authentication perform...
Oil States International is a global oilfield services company that provides specialty products and services to oil and gas drilling and production companies...
Oishii is a US vertical-farming company founded in 2016 and headquartered in Jersey City, New Jersey, that grows pesticide-free Japanese strawberry varieties...
OJO Labs is an Austin, Texas real estate technology company founded in 2015 that operates Movoto, one of the largest consumer real estate search portals in t...
OK Capsule is an on-demand, private-label supplement manufacturing and fulfillment platform. Health brands, telehealth providers, clinics and retailers use i...
OK Play is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile is a lead a...
OkCredit is a mobile digital ledger (bahi khata) application for small business owners and merchants across India, letting shopkeepers record credit and paym...
Okendo is a customer-marketing platform for ecommerce brands, centered on the Shopify ecosystem, that unifies product reviews and ratings, loyalty programs, ...
Okera was a data access governance and data security platform providing fine-grained, attribute-based access control, data discovery and classification, dyna...
Oklahoma is a open data portal open-data portal for United States running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interface ov...
Oklo Inc. is a Santa Clara, California advanced fission company designing and deploying small modular reactors under the Aurora powerhouse brand. The Aurora ...
Okol operates propiedades.com, an online real estate marketplace serving Mexico where buyers and renters search residential and commercial property listings ...
Okra was an open finance / open banking infrastructure company for Africa, headquartered in Lagos, Nigeria. Its REST APIs let businesses link end users' bank...
Okra was an African open-finance / open-banking infrastructure company based in Lagos, Nigeria. Its REST API connected applications to Nigerian bank accounts...
Okta is the workforce identity incumbent — its Identity Cloud platform (also called the Okta Workforce Identity Platform) covers Single Sign-On, Adaptive MFA...
Global cryptocurrency exchange providing a comprehensive REST and WebSocket API for spot and derivatives trading, account management, market data, funding, s...
Ola is India's leading ride-sharing and mobility platform operating across 100+ cities in India and international markets. Its developer ecosystem includes p...
Ola Electric is an Indian electric-vehicle manufacturer building electric scooters (the S1 family), electric motorcycles (the Roadster line), and home energy...
Olaris, Inc. is a precision-medicine diagnostics company in Framingham, Massachusetts, founded in 2014 by Elizabeth O'Day, that combines mass-spectrometry an...
Olark is a live chat and AI-powered customer communication platform that enables businesses to engage website visitors in real time through chat, chatbots, W...
Old Dominion Freight Line is a leading less-than-truckload (LTL) motor carrier providing regional, inter-regional, and national freight services in the Unite...
Old National Bancorp is a regional bank holding company headquartered in Indiana and a Fortune 1000 firm that provides consumer banking, commercial banking, ...
Old National Bank is a nationally chartered, FDIC-insured regional commercial bank and the primary subsidiary of Old National Bancorp (NASDAQ: ONB), headquar...
Old Republic International is one of the nation's largest publicly held insurance organizations, providing general insurance, title insurance, and life and a...
Old Town Media is a New York City media consulting and investment firm founded in 2017 by journalists Tom McGeveran and Josh Benson together with media opera...
Olea is a company surfaced as a portfolio company of insight-partners and added to the API Evangelist network as a stub for enrichment. Sector: government. T...
Olema Oncology is a clinical-stage biopharmaceutical company headquartered in San Francisco with operations in Cambridge, Massachusetts, focused on developin...
Olev is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. As of the 2026-07-20 enrich...
Oligo Security is a runtime security platform built for the AI era, giving security teams real-time visibility and protection across applications, cloud infr...
Olin Corporation is a leading global manufacturer and distributor of chemical products and ammunition. Olin operates three business segments: Chlor Alkali Pr...
OLIPOP PBC is an Oakland, California prebiotic soda maker founded in 2018 by Ben Goodwin and David Lester, built around its trademarked OLISMART blend of pla...
Olist is a Brazilian commerce technology company headquartered in Curitiba, Paraná, offering an integrated ecosystem of solutions that automate business mana...
Olive AI was a Columbus, Ohio healthcare automation company founded in 2012 by Sean Lane (originally as CrossChx, rebranded to Olive in 2017). The company bu...
Olive is an AI-native vendor evaluation and technology procurement platform that runs the full RFP lifecycle in a single workspace — from requirements manage...
Olix (OLIX Computing) is a stealth-stage hardware company building a new computing architecture that integrates SRAM with photonics to address the computatio...
Olli Health is an AI-powered managed service for home health agencies that automates medical coding and OASIS (clinical assessment) and Plan of Care quality ...
Ollie (ollie.com, formerly myollie.com) is a direct-to-consumer pet health company that makes fresh, human-grade dog food tailored to each dog. Customers bui...
Ollin Bio is a privately held biotechnology company developing novel therapeutics, organizing its work around defined therapeutic areas and a product pipelin...
Olly is a company surfaced as a portfolio company of obvious-ventures and added to the API Evangelist network as a stub for enrichment. Sector: human-health....
Olo is a leading on-demand commerce platform powering the digital experience for restaurant brands, serving approximately 750+ enterprise and emerging chains...
OLSET is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile is a lead awa...
OLX is a global online classifieds and marketplace operator, part of OLX Group (owned by Prosus / Naspers), running consumer buy-and-sell marketplaces across...
OlympusDAO is a decentralized reserve currency protocol built on Ethereum that pioneered protocol-owned liquidity (POL). The Olympus protocol issues OHM, a c...
Olyns is a Silicon Valley company, founded in 2019, that operates an AI-powered reverse vending and retail media network built around the Olyns Cube — a self...
OM1 is an AI-powered healthcare analytics and real-world data company that generates real-world evidence from clinical, EMR, and claims data. Its PhenOM foun...
Omada Health is a virtual-first healthcare company founded in 2011 and headquartered in San Francisco that delivers integrated, evidence-based care programs ...
OMass Therapeutics is an Oxford, UK biotechnology company developing medicines for immunological and rare diseases. It harnesses proprietary biochemistry, na...
Omate designs and manufactures Wearable-as-a-Service (WaaS) safety solutions built around cellular-connected smartwatches for people who need protection — se...
Omaze is a for-profit social-impact entertainment company that runs online prize draws to raise money for charity. Founded in 2012 in Culver City, California...
Open Movie Database REST API providing movie and TV show metadata, ratings, poster images, and episode data from a community-maintained database. Supports lo...
Omeat (rebranded as Evergreen Select) is a cultivated-beef company that partners with global meat producers to create price-predictable, industrial-scale bee...
Omen (omen.ai) delivers real-time asset intelligence through continuous fluid analysis, monitoring the health of mission-critical machinery in data centers a...
OMG Network (formerly OmiseGO) is a Layer-2 plasma scaling solution for Ethereum, providing faster, cheaper value transfer and settlement on top of the Ether...
OMGPOP is a company surfaced as a portfolio company of bessemer-venture-partners, y-combinator and added to the API Evangelist network as a stub for enrichme...
Omio (formerly GoEuro) is a Berlin-based travel booking platform that lets travelers search, compare, and book trains, buses, ferries, and flights across tho...
Omise (now Opn Payments, part of Opn) is a Southeast Asian online payment gateway serving Thailand, Japan, and Singapore. Its REST API lets developers accept...
Omnea is an AI-native procurement platform that automates the full source-to-pay (S2P) process, unifying intake management, strategic sourcing, third-party r...
Omnee (Omnee AI) is a Techstars-backed startup providing an AI-powered customer care platform built for residential homebuilders. It pairs a per-home digital...
Omni is an AI-powered business intelligence and embedded analytics platform that turns a governed semantic model into a trusted source of truth for people an...
Omni is a business intelligence and embedded analytics platform that turns raw warehouse data into trusted insights. It combines a central semantic layer wit...
Omni Creator Products (OCP) is a game development platform company founded in 2021 and based in Raleigh, North Carolina, operating fully remote. Its mission ...
Omni Network is a crypto interoperability protocol that makes the entire multi-chain ecosystem feel like a single chain for users and developers. Its core pr...
Omniata is a company surfaced as a portfolio company of creandum and added to the API Evangelist network as a stub for enrichment. Sector: saas. This profile...
Omnicare is a long-term care pharmacy services company providing pharmacy services to long-term care facilities, senior living communities, and other healthc...
Omnicom Group Inc. (NYSE: OMC) is the world's largest marketing and sales communications holding company, formed in its current shape when Omnicom completed ...
Omnidian, Inc. is a Seattle-based clean energy performance assurance company, founded in 2015, that protects and accelerates investments in residential and c...
Omnidock is a merchant-of-record platform that streamlines multi-marketplace expansion for online sellers. The service lets merchants launch and sell product...
Omnifold is an AI supply chain planning platform for physical product companies — CPGs, manufacturers, distributors, and retailers. The company trains a cust...
Omniful is an AI-powered unified supply chain and fulfillment platform that consolidates order management (OMS), warehouse management (WMS), transportation m...
OmniML is a company surfaced as a portfolio company of matrix-partners and added to the API Evangelist network as a stub for enrichment. Sector: ai. This pro...
Omniome was a San Diego genomics company that developed Sequencing By Binding (SBB) technology, a proprietary chemistry aimed at highly accurate short-read D...
Omnipresent was a London-headquartered global employment company, founded in 2019 by Matthew Wilson and Guenther Eisinger, that acted as an Employer of Recor...
Omniscient is an AI intelligence platform for organizational decision-making, describing itself as a new class of AI that masters an organization's data and ...
Omnisend is a Lithuanian-headquartered email and SMS marketing automation platform purpose-built for ecommerce, with first-class integrations into Shopify, B...
Omnitracs is a commercial fleet management, telematics, and transportation-management provider, now part of Solera Inc. (acquired 2021, operating under Soler...
Omniture was a web analytics company founded in 1996 in Orem, Utah and backed by Battery Ventures. It went public in 2006 and was acquired by Adobe Systems i...
omni:us (operated by Qidenus Group GmbH, Berlin) is an insurance technology company building agentic AI for claims processing. Its platform automates end-to-...
omniX labs is a New York-based AI machine-vision analytics company (owned by EverWash) serving car wash, oil-change/lube, and related quick-service automotiv...
OMsignal was a Montreal-based biometric smart-apparel startup, backed by Bessemer Venture Partners, that built compression shirts and the OMbra sports bra wi...
Omvana was a meditation and personal-growth audio app developed by Mindvalley, offering guided meditations, ambient soundscapes, and mixable audio tracks for...
On (On Holding AG) is a Swiss performance sportswear company founded in 2010, known for its CloudTec running shoes and athletic apparel. It designs and sells...
On Deck (now operating as the On Deck Founder Fellowship, ODF) is a founder fellowship and startup community program that helps aspiring entrepreneurs start ...
On Me is a San Francisco digital gifting company that sells wallet-native, multi-brand eGift cards organised by hobby and interest rather than by single reta...
On the Beach Group plc (LSE: OTB) is a Manchester-headquartered online travel agent and the United Kingdom's largest online short-haul beach package holiday ...
ON24 (NYSE: ONTF) is a digital engagement and webinar platform that companies use to run webinars, virtual events, and always-on content experiences and to t...
Onafriq (formerly MFS Africa) is a pan-African digital payments network headquartered in London with operating entities across Mauritius, Ghana, Nigeria, Tan...
Onapsis is a cybersecurity and compliance company for business-critical applications — SAP, Oracle and Salesforce — headquartered in Boston with offices in B...
Onaroll is a company surfaced as a portfolio company of bessemer-venture-partners and added to the API Evangelist network as a stub for enrichment. Sector: v...
Once (getonce.com) is a consumer chat and connection platform positioned as an alternative to traditional dating apps, offering a pressure-free space for peo...
Oncimmune is a biotechnology company specializing in antibody and autoantibody biomarker discovery for precision medicine. Its proprietary ImmunoINSIGHTS pla...
Onco.com is a comprehensive cancer care platform operated by Apollo Hospitals Enterprise Ltd that connects cancer patients across India with oncologists and ...
OncoC4, Inc. is a privately held, late clinical-stage biopharmaceutical company headquartered in Rockville, Maryland, founded in 2020, with subsidiaries in N...
OncoLens is an Atlanta, Georgia based AI-enabled digital healthcare platform for oncology, delivering workflow and analytics software to cancer programs and ...
Oncolinea is a company surfaced as a portfolio company of canaan-partners and added to the API Evangelist network as a stub for enrichment. This profile is a...
Oncoresponse is a company surfaced as a portfolio company of canaan-partners and added to the API Evangelist network as a stub for enrichment. This profile i...
OnCorps AI is an agentic AI platform for fund operations at financial institutions, automating complex middle- and back-office tasks through AI agents that p...
Onda is a ready-to-drink spirits brand that makes canned sparkling tequila — blanco tequila from a woman-owned distillery in Jalisco, Mexico, blended with sp...
OnDeck is a small business lending platform that provides partner APIs for submitting loan applications, checking business health scores via the OnDeck Score...
OnDeck Capital (ODK Capital, LLC) is one of the largest online small business lenders in the United States, providing term loans and business lines of credit...
OnDemand AI (on-demand.io) is a RAG-powered AI Platform-as-a-Service that lets companies infuse AI into their products without managing model infrastructure....
ONDiGO is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile is a lead aw...
ONDisplay is a company surfaced as a portfolio company of matrix-partners and added to the API Evangelist network as a stub for enrichment. Sector: b2b. This...
Ondo Finance builds institutional-grade platforms and infrastructure to bring financial markets onchain, tokenizing real-world assets and equities. Its devel...
OnePay (formerly One / One Finance) is a Walmart-backed consumer fintech that delivers a single mobile app combining banking, high-yield savings, a CashRewar...
OneAssist is an Indian consumer protection and services company that provides device and appliance protection, extended warranty, and financial-fraud assista...
One Codex is a microbial genomics data platform for fast, reproducible microbiome sequencing and analysis. Its cloud platform pairs the "world's largest micr...
One Concern is a Palo Alto, California climate-resilience analytics company that builds a digital twin of the built environment to quantify physical climate ...
One Data is a German enterprise software company (onedata.ai, formerly onedata.de) whose AI-native platform transforms legacy and fragmented enterprise data ...
One Degree is a California-based 501(c)(3) nonprofit technology organization that empowers low-income and underserved individuals, families, and social-servi...
One Five (styled one.five) is a sustainable packaging technology company based in Holm, Germany that pairs an AI-driven decision platform, Quartermaster, wit...
One Medical (1Life Healthcare, Inc.) is a membership-based primary care organization delivering in-person and virtual healthcare across 25+ US cities. Member...
One Model is an HR and people-analytics software platform that unifies fragmented workforce data from HRIS, ATS, payroll, engagement, performance, and financ...
One Month is an online coding education platform that teaches beginners practical software and web development skills through short, project-based video cour...
One More Game is a fully remote game development studio founded by veterans behind titles such as Warcraft, Diablo, StarCraft, and Guild Wars. The team build...
One Raven is a Phoenix, Arizona smart-home technology company building a local-first home automation platform designed for homeowners who want simplicity, pr...
One Robot is a San Francisco-based Y Combinator (Winter 2026) startup building world-model-based simulation environments for robotics teams. Its core product...
One Trading (One Trading Exchange B.V.) is an EU-regulated cryptocurrency and derivatives exchange for retail and institutional traders, positioning itself a...
ONE ZERO Digital Bank Ltd. is Israel's first newly licensed bank in more than four decades - a branchless, mobile-first digital bank founded in 2019 by Prof....
one-chip is a company surfaced as a portfolio company of qiming and added to the API Evangelist network as a stub for enrichment. This profile is a lead awai...
OneAPM (Beijing Blueware Technology / 北京蓝海讯通科技) is a Chinese application performance management and intelligent IT operations vendor founded in 2008. Its pro...
OneASP (Application Security Protection) is the runtime application security product line of OneAPM (Beijing Blue Ocean Xuntong Technology / 蓝海讯通), a Qiming-...
OneBlinc is a US consumer fintech that provides cash advances, credit-building and financial-wellness products to public-sector, healthcare and other essenti...
Onebrief is a defense-technology company building a unified command workspace for military planning, decision-making, and staff collaboration. The web-based ...
OneBusAway is an open-source real-time transit information platform managed by the Open Transit Software Foundation. It provides transit riders with real-tim...
OneCard is a mobile-first metal credit card from India's FPL Technologies, a fintech unicorn that reimagines credit and payments with full-stack, in-house te...
OneChronos operates AI-powered "Smart Market" alternative trading systems that match institutional orders using Nobel Prize-winning combinatorial auction tec...
OneCLI is an open-source credential gateway and identity layer for AI agents. Agents connect to Gmail, GitHub, Slack, AWS, Jira and 50+ other services throug...
OneCommand was a cloud-based customer marketing and loyalty-automation platform built for automotive dealerships, headquartered in Mason, Ohio. It helped dea...
OneConnect Financial Technology (NYSE: OCFT; HKEX: 6638) is a technology-as-a-service platform for financial institutions, incorporated in 2015 as an associa...
Onefinestay is a British luxury hospitality company founded in 2009 that curates and manages a portfolio of upmarket private homes, villas, apartments and ch...
Oneflow is a contract lifecycle management and e-signature platform that turns static documents into smart, data-rich digital contracts - covering creation f...
Onefootball is a Berlin-based digital football (soccer) media platform that aggregates news, live scores, match coverage, video highlights, and streaming (On...
Oneforty was a Twitter application marketplace and app store founded by Laura Fitton in 2009, letting users discover, review, and purchase third-party apps a...
The One Health Company is a Palo Alto veterinary precision-oncology company, best known for its FidoCure platform, that brings human-grade precision cancer m...
Onehouse is a fully managed universal data lakehouse platform, built by the original creators of Apache Hudi. It provides near real-time data ingestion (CDC ...
ONEiO is a managed integration service provider delivering IntegrationOps as a Service, providing cloud-based, automation-led integrations for enterprise IT ...
OneKey is a self-custody crypto wallet company — "Self Custody. Open Source. Fully Onchain." It builds open-source hardware wallets (OneKey Pro, Classic 1S, ...
OneKitchen is a Dubai-based cloud/ghost-kitchen enablement startup founded in 2018 that provided chefs, restaurants, and food entrepreneurs with shared kitch...
OneLogin is an identity and access management platform providing single sign-on (SSO), multi-factor authentication, user provisioning, and a RESTful API for ...
OneMain Holdings is a leading provider of personal installment loans to nonprime consumers in the United States, with branches across multiple states. No pub...
oneNav is a fabless GNSS (Global Navigation Satellite System) semiconductor company building the next generation of mobile positioning. Its L5-direct receive...
ONEOK is a Fortune 500 energy company providing midstream services to natural gas and natural gas liquids producers, processors, and customers. This reposito...
OnePay is a Walmart-backed financial technology company that delivers mobile banking and money services through a single consumer app, with banking provided ...
Onepot (onepot.ai) is a San Francisco-based startup building an AI-powered, fully automated custom synthesis platform for small-molecule drug discovery. It c...
Onera, Inc. was a San Francisco-based retail technology company that built a real-time inventory availability and omnichannel order fulfillment platform. Its...
OneRail is an Orlando, Florida based last-mile delivery orchestration company whose OmniPoint platform unifies fragmented delivery ecosystems into a single d...
OneRoom was an online-learning startup founded in 2014 in San Francisco by Scott Forman and Jeff Kolesky and backed by Bloomberg Beta's 2013 fund with a roug...
OneSchema is an embeddable data onboarding and file-import platform for developers. Its core Importer embeds a guided CSV and spreadsheet upload experience —...
OneScreen AI is a data-driven out-of-home (OOH) advertising company that makes real-world media — billboards, transit, and place-based advertising — as query...
OneShield Software provides core insurance platform solutions for property and casualty (P&C) insurers, managing general agents (MGAs), program administrator...
OneShot (oneshot.ai) is an autonomous outbound sales prospecting platform that uses generative AI, machine learning, and reinforcement learning to automate t...
OneSignal is a lifecycle customer engagement platform for mobile push, web push, email, SMS/RCS, in-app messaging and iOS Live Activities, orchestrated throu...
Onesource Services is a company surfaced as a portfolio company of canaan-partners and added to the API Evangelist network as a stub for enrichment. This pro...
OneSpot was an Austin, Texas adtech and content-marketing startup that built a machine-learning platform to personalize and sequence branded content across w...
OneStream is an enterprise finance platform that unifies financial and operational data into a single source of truth, spanning financial close and consolida...
OneSwoop is a UK car-buying and new-car price-comparison website, founded in 1999 and based in Liverpool, England, that lets consumers compare prices on bran...
OneTick, from OneMarketData, is an enterprise tick database and analytics platform for capital markets, capturing, storing, and analyzing trade, quote, and o...
OneTrueFan is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile is a lea...
OneTrust is an enterprise trust, privacy, and AI-governance platform. Its developer portal publishes 37 downloadable OpenAPI definitions covering roughly 631...
OneUptime is an open source observability platform combining monitoring, incident management, status pages, and on-call scheduling in one OpenTelemetry-nativ...
OnFabric (Fabric) builds portable consumer context for the AI internet, letting people bring their full digital self into their favourite LLMs so agents beco...
OnFarm Systems, founded in 2012 and headquartered in Fresno, California, was an agriculture IoT data-integration company that offered a customizable dashboar...
Onfido is a global identity verification and authentication company that helps businesses verify the identities of their customers. Using advanced technology...
Onfleet is an AI-powered last-mile delivery management platform that orchestrates fleet operations, dispatch, route optimization, and customer experience acr...
OnFrontiers is the first and largest expert network for U.S. federal contractors, an Expertise Intelligence Platform connecting government contractors with 1...
ONI Systems Inc. was an optical networking equipment company that built optical switching and transport systems for metropolitan-area networks during the fib...
Onibi (Onibi inc.) is a video game studio founded in 2023 by Benjamin Devienne, with a distributed team in San Francisco, London and Bordeaux drawn from Bliz...
Onit is a Kenyan digital bank operated by Onit Microfinance Bank Inc. and regulated by the Central Bank of Kenya (CBK), with deposits protected by the Kenya ...
Onkos Surgical is a privately held surgical oncology company founded in 2015 and headquartered in Parsippany, New Jersey, focused on innovative solutions for...
OnKure Therapeutics (Nasdaq: OKUR) is a publicly traded, clinical-stage biopharmaceutical company headquartered in Boulder, Colorado, developing precision me...
Onlia is a Canadian digital insurance brokerage, operating as the registered business name of Onlia Agency Inc. and backed by Southampton Financial Inc. (the...
OnlineNIC offers a RESTful API with JSON format response for our partners to directly manage their products and orders. We intends to help our partners autom...
OnlineTyari is one of India's largest online exam-preparation platforms, built by Next Door Learning Solutions Private Limited (Jaipur, Rajasthan) and acquir...
OnMyGrad is a Hong Kong-based campus-recruitment and career-learning SaaS platform that helps employers connect with university talent across Southeast Asia ...
Onomondo is a global IoT cellular-connectivity platform that connects devices to 680+ networks across 180+ countries using a single core network. The Onomond...
OnPay is an Atlanta, Georgia based provider of full-service online payroll, HR, and employee benefits software for small and mid-size US businesses, founded ...
OnPlan (onplan.co) publishes guidance and content on project controls, budgeting, and forecasting for organizations managing projects and capital programs. T...
Onramp Payments, Inc. (ONRAMP) is a fintech company building modern payments infrastructure for the commercial trucking and fleet industry. Founded by logist...
ON Semiconductor (now branded as onsemi) is a global supplier of semiconductor-based solutions for power efficiency, image sensing, and signal processing in ...
Onshape is a cloud-native computer-aided design (CAD) and product data management (PDM) platform, part of PTC, that runs entirely in a web browser with real-...
Onsi is a global technology provider and UK/EU insurance intermediary that delivers flexible, shift-linked worker benefits — on-demand ("Embedded") pay, insu...
Onsite Dental is a mobile and on-site dental care provider that brings full-scope oral healthcare directly to employers and their employees at the workplace....
Onsitego is a Mumbai-based Indian consumer device-protection company that sells extended warranty, accidental and liquid damage protection, and repair and ma...
OnsiteIQ is a construction intelligence platform for real estate owners and developers that combines regular on-site 360-degree reality capture with AI-power...
OnStation is a digital stationing platform for road and highway construction projects, replacing paper station logs and manual chaining with GPS-based field ...
OnSwipe is a company surfaced as a portfolio company of techstars and added to the API Evangelist network as a stub for enrichment. This profile is a lead aw...
Ontario Data Catalogue is a provincial government open-data portal for Canada running CKAN. It exposes the CKAN catalog API, a standardized machine-readable ...
The Ontario Energy Board (OEB) is the independent regulator of Ontario's electricity and natural gas sectors, licensing and rate-regulating roughly 60 electr...
OnTheMarket is the third-largest residential property portal in the United Kingdom, operating onthemarket.com. It was founded in 2013 by Agents' Mutual Limit...
Ontic is a corporate and physical security management software company based in Austin, Texas, that unifies protective intelligence, executive protection, in...
OnTopX402 is a single public leaderboard of links in which rank is decided solely by the amount paid, settled in USDC over x402. There is no account, no API ...
Ontora is an AI operational-intelligence platform that runs parallel, voice-based AI-agent interviews with every employee to map how work actually gets done ...
Ontra is an AI-powered contract automation and digital execution platform for private markets. It automates routine legal and compliance workflows for invest...
Ontraport is a business automation platform combining CRM, marketing automation, email marketing, landing pages, ecommerce, and membership site capabilities ...
Ontruck is a Spanish road-freight technology platform that connects shippers (cargadores) with a network of professional carriers (transportistas) for full-t...
Onward Delivery is a Denver, Colorado final-mile logistics platform, backed by Techstars, that specializes in "big and bulky" deliveries by smart-matching sh...
onX Maps (onXmaps) is a Montana-based GPS mapping technology company building offline-capable navigation apps for outdoor recreation. Its product line spans ...
Onymos is a Menlo Park, California software company that sells "Features-as-a-Service" (FaaS) — pre-built, pro-code application components that enterprise en...
Onze is a Brazilian fintech (São Paulo) focused on corporate private pension (previdência privada) and financial health for companies and their employees. It...
Ooak Data is an applied AI research lab building the data infrastructure for frontier AI. It turns real company data into reinforcement-learning environments...
OODA Health is a healthcare technology company modernizing the business of healthcare by automating administration and payments between payers, providers, an...
Oolka is a Bangalore-based consumer fintech that helps people in India check, monitor, and improve their credit scores. Its mobile app provides free bureau-i...
Oosto (formerly AnyVision) is an enterprise vision-AI company providing real-time facial recognition, watchlist alerting, and video analytics for physical se...
Opal is a marketing planning and content calendar platform that gives marketing teams a single visual workspace to plan campaigns, build editorial and conten...
Opal Electronics is an original hardware company based in California specializing in the design and engineering of premium webcams and creator-focused camera...
Opalite Health is building the language layer for healthcare. Its platform delivers real-time, AI-powered medical interpretation across 150+ languages, valid...
OPAQUE Systems, Inc. is a confidential-AI platform company that lets enterprises run AI and analytics on their most sensitive data without exposing it. The O...
OPay is a Nigerian mobile money and fintech super-app operated by Blue Ridge Microfinance Bank (OPay Digital Services Limited) and majority-owned by Opera Li...
opbeat is a company surfaced as a portfolio company of balderton-capital, creandum and added to the API Evangelist network as a stub for enrichment. This pro...
Open (Open Financial Technologies) operates at open.money as an India-based fintech offering a connected digital business banking platform for SMEs and start...
Open Insurance Pty Limited (ABN 23 166 949 444, AFSL 451712), trading as Open, is an Australian insurtech and underwriting agency that packages car, home and...
Open is one of India's leading SMB neobanks, pioneering "connected banking" - a unified business finance platform that layers payments, automated reconciliat...
The Open 3D Foundation is a Linux Foundation project supporting the Open 3D Engine (O3DE), an open source, real-time 3D engine for building games, simulation...
Open Bionics is a Bristol, UK-based medical technology company that designs and manufactures advanced multi-grip bionic arms for children and adults with upp...
Open Brewery DB is a free and open-source REST API providing public information on breweries, cideries, brewpubs, and bottleshops worldwide. The database con...
Open Charge Map is the global public registry of electric vehicle charging locations, established in 2011 as a non-commercial, community-driven project. The ...
Open Connectivity for Tours, Activities, and Attractions
OCTO (Open Connectivity for Tours, Activities, and Attractions) is an open standard API specification for the in-destination experiences sector of the travel...
The Open Container Initiative (OCI) is an open governance structure for creating open industry standards around container formats and runtimes, hosted under ...
Open Data Regione Toscana is a open data portal open-data portal for Italy running CKAN. It exposes the CKAN catalog API, a standardized machine-readable int...
Open Data Schleswig-Holstein is a state government open-data portal for Germany running CKAN. It exposes the CKAN catalog API, a standardized machine-readabl...
Open Data Trentino is a open data portal open-data portal for Italy running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interface ...
Open Dental is dental practice management software with an openly documented public REST API. The API is hosted at Open Dental headquarters (base https://api...
Open Development Cambodia is a organization open-data portal for Cambodia running CKAN. It exposes the CKAN catalog API, a standardized machine-readable inte...
Open Development Mekong is a organization open-data portal for Mekong Region running CKAN. It exposes the CKAN catalog API, a standardized machine-readable i...
Open Development Myanmar is a organization open-data portal for Myanmar running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interf...
Open Development Vietnam is a organization open-data portal for Vietnam running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interf...
Open Exchange Rates provides a simple, reliable REST API for live and historical foreign exchange (forex) rates covering 200+ world currencies, with end-of-d...
Open Food Facts is a food products database made by everyone, for everyone. You can use it to make better food choices, and as it is open data, anyone can re...
The Open Geospatial Consortium is the standards body for geospatial interoperability — a member-funded consortium founded in 1994 and headquartered in the Un...
Open GI is a Worcester-headquartered insurance software house that has supplied the UK and Ireland general insurance market for more than 45 years, serving o...
Open Government Canada is a national government open-data portal for Canada running CKAN. It exposes the CKAN catalog API, a standardized machine-readable in...
Open Liberty is a lightweight, open source Java application server from IBM for building cloud-native microservices and applications with full support for Ja...
Open Library offers a suite of APIs to help developers get up and running with its data. This includes RESTful APIs that make Open Library data available in ...
Open Loyalty is an API-first, headless loyalty and gamification platform. Every loyalty mechanic - members, transactions, points, tiers/levels, earning rules...
The Open Mainframe Project is a Linux Foundation project encouraging the use of Linux-based operating systems and open source software on mainframe computers...
Open mHealth is a nonprofit, community-driven initiative that develops open standards and open-source software for making patient-generated health data inter...
open NRW is a open data portal open-data portal for Germany running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interface over app...
The Open Podcast API is an initiative aiming to provide a feature-complete synchronization API specification for podcast (web) apps and user-focused servers....
Open Policy Agent (OPA) is an open-source project that provides a flexible and powerful policy engine for cloud-native environments. OPA enables users to def...
Open Port Technology (OpenPort) is a pan-Asian logistics and supply chain technology company that digitizes trucking, freight, and supply chain operations ac...
Open Presence is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile is a ...
The Open Programmable Infrastructure (OPI) project is a Linux Foundation initiative demonstrating real-world use cases for offloading key infrastructure mana...
Open Service Mesh (OSM) is a lightweight, extensible, cloud native service mesh built on Envoy and the Service Mesh Interface (SMI) specification. OSM provid...
Open Souls is an open-source framework and philosophy for building "AI souls" — agentic, embodied digital beings with personality, drive, and ego, built on t...
Open States is a civic technology project that aggregates and publishes legislative data for all 50 US states, Washington DC, Puerto Rico, and select municip...
The Open Trivia Database (OpenTDB) is a free, user-contributed trivia question database operated by Pixeltail Games LLC. It offers a JSON REST API for retrie...
The Open Trivia Database provides a completely free JSON API for use in programming projects. Use of this API does not require an API key, just generate the ...
The Open Voice Network is a Linux Foundation project advancing open standards for AI-enabled voice assistance systems. Its core initiatives around TrustMark ...
Open WebUI is a self-hosted, open-source web UI for LLMs (notably Ollama and OpenAI-compatible backends). It exposes a REST API for chats, models, prompts, k...
Open-Meteo is an open-source weather API that provides free global weather forecasts, historical reanalysis data, marine conditions, air quality indexes, and...
The OpenADR Alliance is a San Ramon, California mutual-benefit membership corporation that develops, certifies, and promotes OpenADR, the open information-ex...
OpenAI publishes a single unversioned REST API at https://api.openai.com/v1 covering text and reasoning (Responses, Chat Completions), embeddings, images, au...
Collection of OpenAI's artificial intelligence APIs for natural language processing, image generation, speech, and embeddings including Chat Completions, Com...
OpenAir Publishing is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile ...
OpenAPI (formerly Swagger Specification) is a standard, language-agnostic specification for describing RESTful APIs in a machine-readable format. It enables ...
OpenAPI Generator is a community-governed, Apache-2.0 open-source project that generates client libraries (SDKs), server stubs, API documentation and configu...
The OpenAPI Initiative is a Linux Foundation project that promotes the OpenAPI Specification for defining standard, language-agnostic interfaces to RESTful A...
OpenAPI TypeScript Codegen is an MIT-licensed Node.js library and CLI by Ferdi Koomen that reads an OpenAPI 2.0 or 3.0 specification — JSON or YAML, from a p...
OpenAQ is a non-profit organization that focuses on collecting and sharing air quality data from around the world. By providing access to this information th...
OpenArt is an all-in-one AI creation platform for generating and editing images, video, audio, and 3D content from a single workspace. It aggregates leading ...
OpenBao is an open source, community-driven identity-based secrets and encryption management system, forked from HashiCorp Vault in 2023 and governed by the ...
Openbay is an award-winning online automotive service platform and marketplace that connects vehicle owners with local repair shops and service providers, of...
OpenBazaar is an open-source, decentralized peer-to-peer marketplace protocol that let buyers and sellers trade goods and services directly with one another ...
OpenBlock Labs builds OB-1, a self-improving autonomous coding agent that automates the software development lifecycle from PM to PR. OB-1 runs as a native t...
OpenBMC is a Linux Foundation project producing an open source implementation of baseboard management controller firmware. Founded by Microsoft, Intel, IBM, ...
Opencare is a dental care marketplace that helps patients across the United States and Canada discover, review, and book appointments with vetted local denti...
OpenCart is a free, open-source eCommerce platform providing a REST API for managing products, categories, orders, customers, returns, and store configuratio...
OpenChain is an international standard (ISO/IEC 5230) under the Linux Foundation for open source license compliance programs. It helps organizations manage o...
OpenCitations is an open science research infrastructure providing free access to scholarly bibliographic and citation data. It offers REST APIs for querying...
OpenClinica is a clinical-trial electronic data capture (EDC) and clinical data management platform used to build studies, capture case report form (CRF) dat...
OpenCola is a non-profit organization building free, open-source, local-first software as an alternative to corporate social media and cloud platforms. Its a...
OpenCorporates is the world's largest open database of companies, providing a REST API for searching and retrieving company registration data, officer inform...
An open source CNCF specification and reference implementation for real-time cost monitoring of Kubernetes infrastructure and cloud spending, enabling teams ...
OpenCurriculum is a nonprofit education-technology organization (a Y Combinator alum) that builds curriculum-planning software for K-12 schools. Its web appl...
openCypher is an open-source project that provides a standardized graph query language originally developed by Neo4j for querying property graphs. It enables...
opendata.gov.al is the national government open-data portal for Albania (Open Data Albania). It is a custom, DCAT-AP-compliant platform (an Angular single-pa...
opendata.gov.je is a open data portal open-data portal for JE running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interface over a...
OpenData.HRO - Portal für offene Data der Hansestadt Rostock
OpenData.HRO - Portal für offene Data der Hansestadt Rostock is a open data portal open-data portal for Germany running CKAN. It exposes the CKAN catalog API...
opendata.rks-gov.net (RKS Open Data) was the national government open-data portal for the Republic of Kosovo, historically running CKAN (~v2.7). As of mid-20...
opendata.swiss is a national government open-data portal for Switzerland running CKAN. It exposes the CKAN catalog API, a standardized machine-readable inter...
OpenDataNI (Northern Ireland) is a regional government open-data portal for United Kingdom running CKAN. It exposes the CKAN catalog API, a standardized mach...
Open data platform with REST APIs for accessing public datasets from 1,000+ cities and organizations, providing standard OData and JSON query interfaces. Now...
OpenDNS is a cloud-delivered recursive DNS and internet security service founded in 2005 and acquired by Cisco in 2015, where its enterprise capabilities now...
Opendoor is an iBuyer that lets U.S. homeowners request a near-instant cash offer on their home, sell directly to Opendoor, list with Opendoor through its ag...
Opendorse is an athlete marketplace and name, image and likeness (NIL) technology company headquartered in Lincoln, Nebraska. Its platform lets brands, fans,...
OpenDurian is a Bangkok, Thailand based educational technology company delivering hybrid (online plus offline) learning and test preparation. Its platform of...
OpenEBS is a popular and widely deployed open source Container Native Storage platform for stateful persistent applications on Kubernetes. It provides dynami...
openEHR is the open specification family for electronic health records, and the main structural alternative to HL7 FHIR. It is governed by two UK not-for-pro...
Open English is an online English-language learning company founded in 2007 and headquartered in Miami, serving primarily Latin American and Hispanic markets...
OpenEnvoy is an AI-native financial operations platform for enterprise and mid-market finance teams, automating accounts payable, accounts receivable, invoic...
Openet was an Irish telecommunications software company (headquartered in Dublin) that built real-time business support systems (BSS) for mobile network oper...
OpenEvidence is a clinical decision-support search platform that uses generative AI grounded in peer-reviewed medical literature to answer clinical questions...
OpenEyes Insurance (OpenEyes Insurance Agency, Inc.) is an Austin, Texas-based insurtech startup, with an additional New York office, that provides commercia...
OpenF1 is a free and open-source API providing real-time and historical Formula 1 data including car telemetry, lap timings, race control messages, weather, ...
openFDA is the FDA's open data platform providing REST APIs for public access to FDA regulatory datasets. It covers drug adverse events (FAERS), drug labelin...
openFDA is the U.S. Food and Drug Administration's public data platform, providing Elasticsearch-backed REST APIs serving FDA-administered data on drugs, med...
OpenFeature is a CNCF incubating open specification for feature flag management. It provides a vendor-agnostic API for evaluating feature flags, enabling dev...
The Federal Election Commission (FEC) API is a RESTful web service supporting full-text and field-specific searches on FEC data. Bulk downloads are available...
OpenFEMA is FEMA's open data platform, publishing free, public, machine-readable datasets on disaster declarations, public assistance grants, hazard mitigati...
OpenFGA is a CNCF incubating high-performance authorization system implementing fine-grained access control based on the Zanzibar model. It provides a flexib...
OpenFIGI is your entry point to multiple tools for identifying, mapping and requesting a free Financial Instrument Global Identifier (FIGI). OpenFIGI is an o...
OpenFin — now branded HERE — is the operating-system layer for enterprise financial desktops. Its container/runtime lets web applications run as secure, inte...
OpenFX is a cross-border payment infrastructure provider delivering real-time foreign exchange liquidity and settlement for institutional clients across emer...
OpenGamma is a derivatives and margin analytics company whose technology helps trading, risk, treasury and operations teams forecast, stress test, simulate a...
OpenGov builds cloud enterprise resource planning and public service software for state and local government, serving more than 2,000 communities across budg...
OpenHands (by All Hands AI, formerly OpenDevin) is an open-source autonomous coding agent platform. Ships as a Python Agent SDK, CLI, local GUI with a REST A...
Openhouse is a network of neighborhood children's learning centres in Bangalore and Kolkata, India, describing itself as a "Third Space" for children — neith...
OpenID Connect (OIDC) is an identity authentication protocol that is an extension of OAuth 2.0. It enables clients to verify the identity of end-users and ob...
openIDL (Open Insurance Data Link) is a Linux Foundation project developing standardized, interoperable data frameworks for the insurance industry. It uses b...
The OpenInfra Foundation, which recently joined the Linux Foundation, is home to open infrastructure projects including OpenStack, Kata Containers, StarlingX...
OpenInvest was a values-based / ESG investing fintech (Y Combinator and a16z backed) that let advisors and investors build and manage portfolios aligned to s...
OpenIO SDS is an open-source, software-defined object storage platform for building hyper-scalable, high-performance storage infrastructures. It stores data ...
The OpenJS Foundation is a Linux Foundation project that supports the growth of JavaScript and web technologies through open governance and collaboration. It...
OpenKruise is a CNCF incubating project providing advanced workload management and deployment automation for Kubernetes. It extends Kubernetes with enhanced ...
OpenLattice was a data-integration and analytics platform built around an Entity Data Model (EDM) — a graph of entity types, property types, association type...
OpenLaws is a Public Benefit Corporation that provides programmatic access to U.S. law text — federal and state statutes, regulations, constitutions, and cas...
Openlayer is an AI evaluation, testing, and observability platform for machine learning and LLM applications. Its REST API lets teams create projects, commit...
OpenLDAP is an open source implementation of the Lightweight Directory Access Protocol (LDAP) that provides directory server daemons, client libraries, and u...
OpenLight Photonics is a silicon photonics company that designs and manufactures custom Photonic Application-Specific Integrated Circuits (PASICs) using a he...
OpenLLMetry is an open-source observability framework for LLM and generative AI applications, built on top of OpenTelemetry. Maintained by Traceloop under th...
OpenLoop Health is a Des Moines, Iowa-based white-label telehealth infrastructure company that powers virtual care for digital health companies, health plans...
Openly is an independent agent home insurance platform founded in 2017 and headquartered in Boston, Massachusetts. The company provides REST APIs for generat...
OpenMenu provides structured menu data and menu publishing for restaurants, built on the open OpenMenu Format specification. Its public REST API helps develo...
OpenMercantil is an independent public-data API for Spanish company intelligence. It indexes the Boletin Oficial del Registro Mercantil (BORME) and cross-ref...
OpenMetadata is an open-source data catalog and metadata platform providing a comprehensive REST API for managing tables, dashboards, pipelines, data quality...
OpenMeter is open-source usage metering and billing for AI and API products. It ingests usage events as CloudEvents, aggregates them through meters, answers ...
OpenMind builds open-source software that makes robots useful. Its flagship product, OM1, is a modular AI Hardware Abstraction Layer (HAL) and agent runtime ...
OpenNetwork Technologies was an identity and web access management software company known for web-based single sign-on (SSO), authentication, authorization, ...
OpenNode is a Bitcoin and Lightning Network payment processor providing a REST API for businesses and developers to accept Bitcoin payments, create payment c...
OpenObserve is an open source petabyte-scale observability platform with unified logs, metrics, traces, and front-end telemetry in a single UI with SQL and P...
IBM OpenPages is an AI-driven, unified governance, risk, and compliance (GRC) platform delivered as a managed service on IBM Cloud. Originally founded as Ope...
OpenPanel is an open source product analytics platform that provides event tracking, user journey analysis, real-time dashboards, and funnel analysis, offeri...
Openpath is a cloud-based, mobile-first access control platform for the modern workplace — touchless entry, door/reader/relay hardware (ACUs), user and crede...
Openpay is a Mexican and Colombian online payments platform, part of the BBVA group, offering a REST API for accepting card payments, cash/store payments, an...
OpenPhone (rebranded to Quo in 2026) is a business phone and customer communications platform that provides shared phone numbers, calling, SMS/MMS texting, A...
OpenPipe is a fine-tuning and inference platform for distilling expensive frontier-LLM workloads into smaller, cheaper specialized models. Captures productio...
OpenPrescribing.net is an open-data service built and operated by the Bennett Institute for Applied Data Science at the University of Oxford. It turns the En...
Openprise is an AI and data orchestration platform built for enterprise go-to-market teams — RevOps, marketing operations and sales operations. It cleans, un...
OpenProject is an open source project management platform offering work package tracking, Gantt charts, agile boards, time tracking, BIM, and enterprise proj...
OpenProse, Inc. builds an open-source (MIT) programming language for AI sessions: standing AI jobs are declared as durable Markdown contracts (`*.prose.md` f...
Openprovider is a wholesaler of Internet services and products with a unique platform from which you can find and manage all the products you need: domains, ...
OpenRelay is a Y Combinator-backed distributed GPU cloud for production AI inference — "the CDN of inference." It runs a global mesh of GPUs (RTX 4090/5090, ...
OpenReplay is an open source session replay and product analytics platform that helps developers debug web applications by recording and replaying user sessi...
Openroll is an AI-native operating system for compensation, built for People and Finance teams. It connects to existing HRIS, ATS, ERP, and finance systems, ...
OpenRouter is an API platform that provides unified access to multiple AI language models through a single interface. OpenRouter acts as a "router" or gatewa...
OpenRouteService is a free, open-source geospatial API platform built on OpenStreetMap data, providing routing directions for multiple transport modes, isoch...
OpenSanctions is an open database of international sanctions, watchlists, criminal designations and politically exposed persons (PEPs), published as a screen...
OpenSea is the world's largest NFT marketplace, offering a REST API for querying NFT collections, listings, offers, orders, and events, and for managing prog...
OpenSearch is the open source, community-driven search, analytics, and observability suite (forked from Elasticsearch and Kibana) maintained under the Linux ...
Opensense (formerly SenderGen) is an email signature management platform that centrally governs email signatures, banners, and digital business cards across ...
OpenSERP is an open-source, self-hostable SERP API that returns structured search results from Google, Bing, Yandex, Baidu, DuckDuckGo and Ecosia through one...
OpenSesame is an online learning course marketplace founded in 2002 and headquartered in Portland, Oregon. It offers 60,000+ pre-vetted training courses in 7...
Open-source flight tracking network with a REST API for accessing real-time and historical ADS-B aircraft state vectors, flight tracks, and airport arrivals ...
OpenSpace is a visual intelligence platform for the construction industry, headquartered at 333 Kearny Street, San Francisco, California. The company pairs a...
OpenSpec (by Fission-AI) is an open-source, lightweight spec-driven development (SDD) framework for AI coding assistants. It adds a durable spec layer so you...
OpenSponsorship is a two-sided sports sponsorship and influencer marketing marketplace that connects brands with a network of more than 25,000 professional a...
The Open Source Security Foundation (OpenSSF) is a collaborative initiative under the Linux Foundation dedicated to improving the security of open source sof...
Open source cloud computing platform for building and managing public and private clouds, providing infrastructure as a service (IaaS) through a set of inter...
OpenStatus is an open-source synthetic monitoring and status-page platform. It runs HTTP, TCP, and DNS uptime checks from 28 global regions, publishes hosted...
OpenStore (Miami Labs, Inc. d/b/a OpenStore) is a Miami-based e-commerce holding company that buys direct-to-consumer Shopify businesses from their founders,...
OpenStreetMap (OSM) is a collaborative project to create a free, editable map of the world. The OSM ecosystem exposes a family of public REST APIs: the main ...
OpenTable is a global restaurant reservation platform owned by Booking Holdings. The OpenTable Partner Portal exposes restricted partner APIs for reservation...
Vendor-neutral open-source observability framework for cloud-native software, providing a collection of tools, APIs, and SDKs for instrumenting, generating, ...
Open-source infrastructure as code tool forked from Terraform, providing a community-driven alternative for provisioning and managing cloud infrastructure us...
OpenToken (OpenToken Inc.) was a San Francisco based cryptocurrency startup founded in 2017 that operated a token-fundraising and token-project aggregation p...
OpenTopography API is a web service that provides users with access to high-resolution topographic data and tools for analysis and visualization. The API all...
OpenTrade is an institutional-grade platform for stablecoin lending and yield products, enabling fintechs, neobanks, crypto exchanges, custodians, stablecoin...
The OpenTravel Alliance is a volunteer, non-profit travel technology standards body headquartered in Melbourne, Florida, United States. Since 1999 it has pub...
OpenTripMap provides a travel points of interest REST API with access to over 10 million POIs worldwide including attractions, restaurants, hotels, museums, ...
Opentrons is a lab automation platform providing a REST HTTP API and Python Protocol API for controlling liquid handling robots such as the Opentrons Flex an...
OpenUV provides a global real-time UV index API. The service combines meteorological inputs (ozone, cloud cover, area reflection) with NASA satellite sources...
Openverse is a search engine providing programmatic access to the world's largest openly-licensed media catalog, covering 800M+ images and audio tracks from ...
OpenVPN is a secure networking company providing VPN and Zero Trust network access solutions for over 20,000 organizations worldwide, offering both the self-...
The OpenWallet Foundation is a Linux Foundation Europe project that brings developers and standards organizations together to facilitate global interoperabil...
OpenWeather is a data platform that provides accurate and reliable weather information to individuals, businesses, and organizations around the world. They g...
OpenWeather (operating openweathermap.org) is a global weather data platform delivering current weather, multi-horizon forecasts, historical archives, climat...
OpenWeb (formerly Spot.IM) is a community and audience-engagement platform for publishers, delivering OpenWebOS — a unified, end-to-end suite for building co...
OpenWork is an open-source, enterprise-ready alternative to Claude Cowork — a desktop application and agent runtime, built as a GUI for OpenCode, that lets p...
OpenX is an independent supply-side platform (SSP) and programmatic ad exchange headquartered in Pasadena, California, founded in 2008. OpenX connects publis...
OpenYurt is a CNCF incubating project that extends Kubernetes for edge and cloud-edge collaboration scenarios. It provides node autonomy for edge nodes to co...
OpenZeppelin is a Web3 security platform providing tools for secure smart contract development, deployment, monitoring, and automation. The platform includes...
Oper (Oper Credits) is a Belgium-based fintech that provides digital mortgage origination software for banks, lenders, brokers and insurers. Its modular Oper...
Oper Credits is a Belgian digital mortgage origination platform (Brussels, founded 2019) that lets banks, lenders, insurers, and brokers offer and process en...
Opera is the Norway-based, Nasdaq-listed (OPRA) maker of the Opera, Opera GX, Opera Air, Opera Mini and Opera Neon web browsers, and the operator of the Oper...
Operand is an AI-enabled pricing and commercial strategy platform for consumer retail, founded in 2024 and backed by Felicis, Y Combinator, SV Angel, and Som...
Operant AI is a San Francisco-based runtime security company (founded 2021, backed by Felicis) that protects cloud and AI applications with real-time, Kubern...
API for managing and accessing operation support equipment data, inventory, maintenance records, and deployment information for operational logistics and equ...
The Operator Framework is a CNCF incubating toolkit for building and managing Kubernetes Operators. It includes the Operator SDK for scaffolding and building...
Opereit is a Barcelona-based logistics technology company building AI agents that audit, claim, and recover logistics costs autonomously. Its agents detect c...
OP.GG is the world's leading League of Legends statistics and performance tracking platform. Founded in Seoul, South Korea and launched in 2013, it grew from...
Ophelia is a telehealth company delivering online treatment for opioid use disorder (OUD) through medication-assisted treatment (MAT). Founded in 2020 and ba...
Ophelia is a telehealth company providing private, evidence-based medication-assisted treatment (MAT) for opioid use disorder from home. Founded in 2019 by Z...
Opik is an open-source LLM evaluation, testing, and tracing platform developed by Comet ML that enables developers to debug, evaluate, and monitor LLM applic...
Opkey (Smart Software Testing Solutions, Inc.) is a US-headquartered Cloud Application Lifecycle Management and AI-powered test automation vendor for enterpr...
Opkit was a healthcare automation company that built an automated health insurance verification platform purpose-built for telehealth companies and virtual m...
Opna Bio is a clinical-stage biopharmaceutical company focused on oncology, developing novel small-molecule and targeted-degrader therapeutics against key re...
OPNsense is an open source FreeBSD-based firewall and routing platform providing stateful packet filtering, VPN (IPsec, OpenVPN, WireGuard), intrusion detect...
Oportun (Nasdaq: OPRT) is a mission-driven financial services company and U.S. Treasury-certified Community Development Financial Institution (CDFI) that pro...
Opower is a customer engagement and energy efficiency cloud platform for utilities, now delivered as Oracle Utilities Opower after Oracle acquired the compan...
Opply is a supply chain operations platform for food and beverage brands that automates ingredient and packaging sourcing, ordering, logistics, and supplier ...
Opsani was an enterprise software company based in Redwood City, California that delivered an ML-driven cloud platform for Continuous Optimization as a Servi...
Opsera is an AI-powered unified DevOps platform that helps enterprise software teams orchestrate the full software delivery lifecycle from a single control p...
OpsGenie is an incident management and alerting platform, now part of Atlassian, that helps operations teams manage on-call schedules, route alerts, and coor...
OPSI Slovenia is a national government open-data portal for Slovenia running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interface...
Opsmatic was a San Francisco-based infrastructure monitoring startup founded in 2013 that delivered a cloud service for real-time visibility into configurati...
OpsMill is the company behind Infrahub, an open-source, graph-based infrastructure data management platform that unifies a source of truth for network, data ...
Optain (Optain Health) is a healthcare technology company delivering AI-powered retinal imaging and oculomics for early, non-invasive detection of chronic di...
Opterrix delivers real-time and historical weather and natural hazard intelligence to inform and automate key decision-making throughout the insurance value ...
Opti is an AI-native identity and access management (IAM) platform for enterprises struggling with access sprawl across human, non-human, and agentic identit...
Optiant, Inc. was a Boston-area supply chain optimization software company founded in 2000 on multi-echelon inventory optimization technology developed by re...
Optibus is a cloud-native, end-to-end operating system for public transportation planning, scheduling, rostering and operations, used by transit agencies and...
Optic is an MIT-licensed command-line tool for OpenAPI linting, diffing and testing. It compares two versions of an OpenAPI document with behaviour-aware dif...
Optichron is a company surfaced as a portfolio company of battery-ventures and added to the API Evangelist network as a stub for enrichment. This profile is ...
OpticOdds is a B2B sports betting data provider whose v3 REST API delivers real-time and historical odds aggregated from 200+ sportsbooks, covering main line...
Optilogic is a cloud-native supply chain design company headquartered in Ann Arbor, Michigan, whose Cosmic Frog platform lets teams model, optimize, simulate...
Optimal is a preventive-health and longevity company based in Mexico City, backed by 500 Global, operating across Latin America (Mexico, Colombia, and Peru)....
Optimal Dynamics is the Decision Company for trucking. Its Transportation Decision System (TDS), CORE.ai, applies Artificial Decision Intelligence — born fro...
Optimism is an Ethereum Layer 2 scaling network and the originator of the OP Stack — an open-source, modular rollup framework that powers OP Mainnet and a gr...
Optimism Etherscan is the official blockchain explorer and API platform for the Optimism L2 network (OP Mainnet, chain ID 10). It provides REST APIs for quer...
Optimity is a health and rewards platform (myoptimity.com) that helps millions of members live healthier, wealthier, and longer through gamified micro-learni...
Optimizely is a digital experience platform that provides A/B testing, feature flagging, content management, and commerce solutions for enterprises. Their de...
OptimizerAI is an AI-powered sound effects (SFX) foundation model that generates unlimited, high-quality, royalty-free audio from text prompts or reference a...
Optimotive is an autonomous-robotics company building a vertically integrated fleet of advanced robots for the toughest, most extreme environments across con...
Optimyze (Optimyze.cloud Inc.) was a Zurich, Switzerland based continuous-profiling startup, seeded by Andreessen Horowitz (a16z) in 2020, and the maker of P...
Optimyzee is an AI-powered ad management platform that structures and optimizes Google Ads search campaigns in minutes, acting like a senior PPC specialist. ...
OptinMonster is a lead-generation and conversion-optimization SaaS from Awesome Motive that serves on-site campaigns — popups, floating bars, slide-ins, full...
Options Technology (Options IT) is a capital markets managed services and trading infrastructure provider founded in 1993, backed by private equity firm Abry...
OptiSigns is a cloud digital signage platform that turns any TV or display into a digital sign using low-cost media players (Android, Amazon Fire TV, Raspber...
Optivolt Labs (operating as Optivolt) is a Burlingame, California solar technology company building intelligent home solar systems with power electronics emb...
Optiwatt is a consumer-centric energy management platform that helps electric-vehicle drivers and homeowners lower their electricity bills by automatically s...
Opto (Opto Investments) is an end-to-end private markets investment platform built for wealth managers - RIAs, family offices, and private banks. The platfor...
OptoAtmospherics, Inc. is an Ann Arbor, Michigan company (founded 2009, spun out of Michigan Aerospace Corporation) that develops UV-based Light Detection an...
Optoro is a returns management and reverse-logistics software company (Washington, DC; acquired by Blue Yonder in August 2025) whose OptiTurn platform powers...
Optoscale (OptoScale AS) is a Norwegian aquaculture technology company founded in 2015 in Trondheim that builds AI-powered, camera-based edge-computing monit...
Optum, part of UnitedHealth Group, is a health services and technology company that operates one of the largest medical, dental and pharmacy networks in the ...
Optus (Singtel Optus Pty Limited) is Australia's second-largest telecommunications carrier, wholly owned by Singapore's Singtel and headquartered in Macquari...
OpusClip (Opus) is an AI video platform that turns long-form videos into short-form, viral clips and publishes them to social platforms. The OpusClip API let...
OpusClip (opus.pro), operated by Opusclip Inc. of Mountain View, California, is an AI video platform used by 16M+ creators and businesses. It spans two produ...
Opyn is a DeFi options protocol on Ethereum mainnet best known for Squeeth (squared ETH), a Power Perpetual that gives traders continuous exposure to ETH² wi...
Oracle Application Express (APEX) is a low-code development platform that enables you to build scalable, secure enterprise apps with world-class features.
Oracle Cloud Infrastructure (OCI) is Oracle's public cloud, exposed as a REST control plane of 159 service APIs covering compute, virtual cloud networking, b...
Oracle Container Engine for Kubernetes (OKE) is a managed Kubernetes service that simplifies the deployment, management, and scaling of containerized applica...
Oracle Database 19c is a multi-model database management system that provides a comprehensive platform for enterprise data management, analytics, and applica...
A collection of APIs for Oracle E-Business Suite (EBS), Oracle's comprehensive suite of integrated, global business applications that supports today's evolvi...
Oracle Eloqua is a marketing automation platform that provides tools for lead management, email marketing, and marketing campaign management through comprehe...
Oracle Enterprise Manager (OEM) provides a comprehensive management platform for managing Oracle IT infrastructure and applications. The APIs enable programm...
Oracle Essbase is a multi-dimensional database management system that provides a multidimensional analytical platform for business intelligence applications,...
Oracle Fusion Cloud Applications represent a comprehensive suite of cloud-based enterprise resource planning (ERP), human capital management (HCM), customer ...
Oracle GoldenGate enables real-time data integration and replication in heterogeneous IT environments. These APIs provide programmatic access to manage and m...
Oracle Health, formerly Cerner, builds and operates Millennium — one of the two dominant electronic health record platforms in United States hospitals and he...
Oracle Health Data Intelligence, formerly Cerner HealtheIntent, is a tenant-scoped population health platform that aggregates data from electronic health rec...
Oracle Hospitality is Oracle Corporation's hotel and food-and-beverage technology line, built on the 2014 acquisition of MICROS Systems and anchored by OPERA...
Oracle Integration provides native connectivity to Oracle and non-Oracle Software as a Service (SaaS) and on-premises applications, such as Oracle ERP Cloud,...
Oracle NetSuite is a cloud-based business management suite that combines ERP, financials, CRM, inventory, supply chain, ecommerce, and human capital manageme...
Oracle NetSuite is a cloud-based ERP suite covering financials, accounting, order management, inventory, CRM, ecommerce, HR, and professional services automa...
Oracle Partitioning is a licensed option of Oracle Database Enterprise Edition that divides large tables and indexes into smaller, independently manageable s...
A collection of APIs for Oracle Planning and Budgeting Cloud Service (PBCS) and Enterprise Performance Management (EPM) Planning. Oracle EPM Cloud provides R...
Oracle Platforms is the API Evangelist index of Oracle's cloud and enterprise platform APIs: the Oracle Cloud Infrastructure (OCI) control plane for compute,...
Oracle Primavera is a portfolio of project portfolio management (PPM) applications for construction, engineering, and capital project industries. Primavera A...
Oracle Retail is a suite of cloud and on-premises applications for retailers spanning merchandising, pricing, supply chain, omnichannel order management, poi...
Oracle Siebel CRM APIs provide programmatic access to customer relationship management functionality including sales, marketing, and service automation capab...
Oracle Transportation Management (OTM) is a logistics platform delivered as part of Oracle Fusion Cloud Transportation and Global Trade Management. OTM APIs ...
Collection of APIs and resources for Oracle WebLogic Server administration and management. WebLogic Server is Oracle's enterprise-grade Java EE application s...
Oradian is an AI-native, cloud-based core banking platform that helps banks, lenders, microfinance institutions, and fintechs in Asia, Africa, and Europe rep...
Orakl Oncology is a Paris-based TechBio company, a spin-off from the Gustave Roussy cancer institute, building an AI-powered drug-development platform that c...
OraLiva, Inc. is a dental diagnostics company developing an AI-powered oral cancer and dysplasia detection system for use during routine dental visits. Its O...
Orama is an open-source, in-memory search engine and RAG pipeline (full-text, vector, and hybrid search in under 2kb) plus Orama Cloud, a hosted REST platfor...
Orange Developer offers a portfolio of network, communication, identity, location, payment, IoT, and cloud APIs that allow developers to build new customer e...
Orange Business is the B2B, telco-cloud, and developer arm of Orange S.A. — France's leading telecommunications group operating across Europe, the Middle Eas...
Orange Health Labs is an Indian at-home diagnostics laboratory serving Bengaluru, Delhi, Gurgaon, Noida and Hyderabad, offering 60-minute home sample collect...
Orange Logic builds OrangeDAM (formerly branded Cortex), an enterprise digital asset management (DAM) and media asset management (MAM) platform used by museu...
Orapharma is a specialty pharmaceutical company and a division of Bausch Health focused on oral healthcare, developing and commercializing products that help...
ORAS (OCI Registry As Storage) is a CNCF project that provides a CLI and a set of client libraries for pushing and pulling arbitrary OCI artifacts to and fro...
Orasis Pharmaceuticals is an ophthalmic pharmaceutical company with offices in the United States and Israel, focused on treatments for presbyopia — the age-r...
Oration (Oration PBC, product OrationRx) was a Foster City, California prescription-savings SaaS that helped self-insured employers and their employees find ...
Orative Corporation was an enterprise software company that built conferencing and collaboration software for mobile business users, offering a client-server...
Oratomic is a Pasadena, California quantum computing company where leading researchers from Caltech and Harvard are building utility-scale, fault-tolerant qu...
Orb is a usage-based billing and metering platform that turns product usage events into subscriptions, prices, invoices, and credits. The Orb REST API ingest...
Orbicle Bio is an agricultural biotechnology startup developing carbon-negative, microbial-based organic fertilizers derived from soil microbes to replace sy...
Orbii is a Riyadh-based credit infrastructure company providing AI-powered underwriting and lending infrastructure for banks, fintechs, neobanks, and B2B pla...
Orbii is a MENA-region credit and lending infrastructure company. Its API turns raw business financial data - bank transactions and invoices - into automated...
Orbio Earth is a climate-tech company (founded 2021; Dover, Delaware, USA and Cologne, Germany) that turns open satellite data into industrial methane intell...
Orbis Education is a healthcare education services company founded in 2003 that partners with universities and healthcare systems to create, market, and mana...
Developer relations and community intelligence platform with a REST API for tracking member activities, measuring community growth, and managing developer ad...
Orbit Fab is a company surfaced as a portfolio company of techstars and added to the API Evangelist network as a stub for enrichment. This profile is a lead ...
Orbital is a data gateway and integration platform that connects APIs, databases, event streams, and other data sources without requiring glue code or manual...
Orbital Arc is a Houston-based deep-tech spacecraft propulsion startup founded in 2023 by Jonathan Huffman, building Gas-Phase Field Effect Electric Propulsi...
Orbital ATK was an American aerospace manufacturer and defense industry company formed in February 2015 by the merger of Orbital Sciences Corporation and the...
Orbital Insight was a Palo Alto, California geospatial analytics company founded in 2013 by James Crawford (formerly Bell Labs, Google Books, and NASA's Mars...
Orbital Materials (rebranded Orbital Industries in 2026) is an AI industrial company founded in 2022 by Jonathan Godwin, a former DeepMind researcher, with o...
Orbital Operations is a space-defense technology company founded in 2024 and based in Huntington Beach, California, developing high-thrust, cryogenic-powered...
Orbital Therapeutics was a Cambridge, Massachusetts biotechnology company developing next-generation RNA medicines, combining circular and linear RNA, target...
Orby AI is an enterprise generative process automation company that uses Large Action Models, neuro-symbolic reasoning, and agentic process discovery to obse...
Orca is the leading user-friendly concentrated-liquidity automated market maker (AMM) on Solana, built around Whirlpools. Liquidity providers concentrate cap...
Orca Bio is a late-stage biotechnology company, headquartered in Menlo Park, California with a cGMP manufacturing facility in Sacramento, developing high-pre...
Orca Security is an agentless cloud security platform that uses its patented SideScanning technology to provide visibility into risks across AWS, Azure, Goog...
Orchard (Orchard Platform Markets) was a New York City online-lending technology company founded in 2013 that provided data, analytics, reporting, and an ord...
Orchard Labs Inc. is a Toronto-based e-commerce company, founded in 2013, that buys, refurbishes, and resells pre-owned and certified-refurbished smartphones...
Orchard Robotics (Orchard AI, "The AI Farming Company") is an agricultural technology startup founded in 2022 that builds AI-powered camera systems and farm-...
Orchestra is an agentic operations platform for drug development and life sciences R&D organizations. The software helps biotech and pharmaceutical teams uni...
Orchestra (orchestra.bio) is an agentic operations platform for drug development and life sciences R&D organizations, helping teams unify planning across lea...
Orchid Labs is the company behind Orchid, an open-source, decentralized marketplace for bandwidth and a privacy-focused VPN. Orchid lets users pay for VPN se...
ORCID provides a persistent digital identifier (an ORCID iD) that you own and control, and that distinguishes you from every other researcher. ORCID provides...
Ordana provides AI agents that run wholesale order-desk operations for distributors, reading every order across email, fax, PDF, EDI, voice, SMS and chat, re...
Order Desk is an ecommerce order management and fulfillment routing platform that centralizes orders from shopping carts and marketplaces, then automates rou...
Order.co (founded 2016 in New York as Negotiatus, rebranded to Order.co in 2021) is a procurement and finance-automation platform for mid-market and enterpri...
OrderCircle is a B2B wholesale order management software platform, founded in 2015 in San Francisco, that gives fast-growing brands one system to automate wh...
Orderful is a modern B2B trading and EDI platform that lets companies connect once to transact with any partner in their supply chain without building custom...
Ordergroove is an enterprise subscription and relationship-commerce platform that lets retailers and DTC brands offer recurring purchases, autoship, membersh...
Orderly Health is a Denver, Colorado healthcare data company that keeps provider directories accurate and usable. Founded in 2015, its API-first platform use...
Orderly Network is an omnichain, orderbook-based trading infrastructure that provides perpetual-futures liquidity for decentralized exchanges and builders. I...
Ordermark is a restaurant technology company that consolidates online food delivery and takeout orders from third-party channels such as DoorDash, Uber Eats,...
Ordnance Survey is Great Britain's national mapping agency, a government-owned company that maintains the addressing and mapping layer the UK property market...
Ordo (operated by The Smart Request Company Ltd, ordohq.com / ordopay.com) is a United Kingdom open-banking payments provider that lets businesses collect mo...
Ordoro is a multi-channel order management and ecommerce logistics platform designed for small and medium-sized businesses. It provides a REST API for syncin...
Ordway is a billing and revenue automation platform providing REST APIs for managing subscriptions, invoicing, payments, revenue recognition, and financial r...
Organon & Co. is a Fortune 500 global healthcare company focused on improving the health of women throughout their lives. Spun off from Merck in 2021, Organo...
Orgspace, Inc. was a B2B people-operations software company offering org design, staffing, and workforce analytics tools that integrated alongside existing H...
Oricell Therapeutics (原启生物) is a Shanghai-based clinical-stage biopharmaceutical company developing cell-based immunotherapies for cancer, including GPC3-tar...
Origami Logic was a marketing-intelligence / big-data analytics company (backed by Accel and Lightspeed Venture Partners) surfaced as a VC-portfolio lead in ...
Origami Risk is a Chicago-headquartered risk, safety and insurance SaaS company founded in 2009 that began as a single-version cloud RMIS (risk management in...
Origami Robotics is a Y Combinator (Winter 2026) hardware startup based in Millbrae, California building advanced robotic hands designed specifically for mac...
OriGene Technologies, Inc. is a life sciences company that develops and supplies validated research reagents and laboratory services for genomics and proteom...
Origin (Origin Markets) is a digital debt capital markets (DCM) platform that automates bond issuance from front to back, connecting issuers, dealers, lawyer...
Origin Bio is a cancer-biology research company that generates spatial, molecular, and functional maps from patient tumor samples to study cancer in its nati...
Origin Energy Limited is Australia's largest energy retailer, an ASX-listed integrated gas and electricity company headquartered in Sydney that supplies roug...
Origin (Blend Financial Inc. DBA Origin Financial) is a personal finance platform built around an SEC-regulated AI financial advisor, combining spending trac...
Origin Protocol builds permissionless DeFi infrastructure for yield-bearing tokens on Ethereum and L2s. Its products include Origin Ether (OETH) and Super OE...
Oriient provides software-only, hardware-free indoor positioning ("indoor GPS") and navigation delivered as a SaaS SDK. Its geomagnetic technology reaches ro...
Orion by Gravity is a collaborative, AI-native analytics platform built by Gravity (bygravity.com) that connects directly to your data warehouse — Snowflake,...
Orion Multisystems is a company surfaced as a portfolio company of battery-ventures and added to the API Evangelist network as a stub for enrichment. This pr...
Orionis Biosciences is a privately held biotechnology company headquartered at 950 Winter Street in Waltham, Massachusetts, with a research site in Ghent, Be...
Orionsec (ORION Security) is a data loss prevention (DLP) platform that uses AI-powered, context-aware agents to detect and prevent data exfiltration across ...
Orna Therapeutics is a Cambridge, Massachusetts biotechnology company, founded in 2019 on research from MIT and built by MPM Capital, that engineers circular...
Ornadyne is a Los Angeles hard-tech startup building autonomous flapping-wing UAVs (ornithopters) that look and fly like real birds for covert reconnaissance...
Ornikar is a French online driving school and insurance company that guides consumers from earning their driving permit through to car, home, and pet insuran...
ORO Labs provides an agentic procurement orchestration platform for enterprise spend management. It coordinates people, processes, systems, and data so emplo...
Orori is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile is a lead awa...
Orqa is an aerial robotics company founded in 2018 and headquartered in Osijek, Croatia, that designs and manufactures mission-ready FPV (first-person view) ...
OrsoBio is a privately held, clinical-stage biopharmaceutical company founded in 2021 and headquartered in Palo Alto, California, developing first-in-class o...
Ortec International is a company surfaced as a portfolio company of battery-ventures and added to the API Evangelist network as a stub for enrichment. This p...
Orthocon, now operating as Abyrx, is a surgical-therapeutics medical device company that has built a materials-science platform focused on therapeutic device...
Orthogonal is a unified API and payment layer for AI agents, backed by Pantera Capital and Y Combinator. An agent describes what it needs in natural language...
Ortto (formerly Autopilot) is a marketing automation, customer data platform (CDP), and analytics product. Its REST API at https://api.ap3api.com/v1 lets app...
Orum is a payments infrastructure company that lets businesses move money and verify bank accounts through a single unified API. Its Deliver product provides...
Orum is an AI-powered sales calling and performance platform, marketed as "The Calling Performance System for Sales Teams" and "the AI-powered Live Conversat...
Orus is a French online insurance broker ("l'assurance professionnelle en ligne") offering professional-liability and business insurance to independent profe...
Orval is an MIT-licensed open source code generator that turns any valid OpenAPI v3 or Swagger v2 specification into type-safe TypeScript. From one spec it e...
Ory is an open source identity infrastructure platform providing OAuth2 and OpenID Connect (Hydra), identity and user management (Kratos), permissions and au...
Osana is a company surfaced as a portfolio company of general-catalyst and added to the API Evangelist network as a stub for enrichment. This profile is a le...
Osano is a data privacy platform, founded in 2018 and headquartered in Austin, Texas, that helps organizations build and run privacy programs across consent ...
OSARO is a San Francisco-based industrial AI company that builds machine-learning software for warehouse and fulfillment robotics. Its SightWorks perception ...
Oscar Health (NYSE: OSCR) is a technology-driven health insurance company founded in 2012 and headquartered in New York City. It offers individual and family...
OSCAR EMR is an open-source electronic medical record (EMR) system created by Dr. David Chan and McMaster University's Department of Family Medicine, and one...
Oscar Health is a technology-driven health insurance company offering individual, small group, and Medicare Advantage plans. It uses software, member-facing ...
The Office of the Superintendent of Financial Institutions (OSFI / BSIF) is Canada's federal prudential regulator, supervising more than 400 federally regula...
OSGi is a set of specifications that define a dynamic component system for Java. It enables modular, service-oriented Java applications by managing the life ...
The Occupational Safety and Health Administration is the U.S. federal agency, part of the Department of Labor, responsible for setting and enforcing workplac...
Oshi Health is a virtual, whole-person gastrointestinal (GI) care clinic delivering insurance-covered telehealth to patients with digestive conditions such a...
Oshkosh Corporation is a Fortune 500 industrial company that designs and builds purpose-built vehicles and vehicle bodies, including access equipment, defens...
OSIsoft was the enterprise software company behind the PI System, the operational data infrastructure used across manufacturing, energy, utilities, oil and g...
OSIsoft PI System is a real-time data management platform used by industrial organizations to capture, analyze, and visualize operational data from sensors, ...
OSlash is a productivity tool that lets teams create short, memorable shortcuts — typed as "o/" followed by a keyword — to instantly find and open their docu...
Osly is an AI workflow automation platform (a product of Alore AI) that lets startups and prosumers build N8N-based AI workflows from natural language, with ...
osmAPI is a unified AI gateway that routes requests to OpenAI, Anthropic, Google, and 14+ LLM providers through a single API. Drop-in compatible with the Ope...
Osmaura is a Y Combinator (Summer 2026) startup building opportunity intelligence for corporate law firms. It monitors public web signals, the government rec...
Osmind is an interventional psychiatry platform that powers what it describes as the largest network of interventional psychiatry practices in the United Sta...
Osmo (Tangible Play) makes hands-on, screen-interactive learning games for iPad and Fire tablet that pair a physical reflector base placed over the device ca...
Osmos is an AI-powered data ingestion and data onboarding platform that helps companies import, clean, transform, and validate data arriving from customers, ...
Osmosis (Gulp AI Inc.) is a forward-deployed reinforcement-learning platform for post-training large language models. Teams implement an AgentWorkflow and a ...
Oso Cloud is an authorization-as-a-service platform that provides a REST API for defining and enforcing relationship-based access control policies. It enable...
Osseus is a secure research intelligence platform - "the secure research brain for R&D" - that connects the tools teams already use, scattered documents, and...
Ossia, Inc. is a Redmond, Washington wireless power technology company founded by physicist Hatem Zeine (incorporated as Omnilectric in 2008, operating as Os...
OSSIO is an orthopedic fixation medical device company headquartered in Woburn, Massachusetts and founded in Israel in 2014. It develops and sells OSSIOfiber...
Ossium Health is a bioengineering company developing off-the-shelf cell therapies manufactured from stem cells recovered from deceased organ and tissue donor...
Ossus builds AI-native intelligence for cultural institutions, starting with libraries. Its flagship product is Ossus ILS, a modern integrated library system...
Ostaz is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile is a lead awa...
Ostium is a decentralized perpetual-futures exchange that lets traders access global real-world-asset markets — stocks, ETFs, commodities, indices, forex and...
Ostra Security is a managed security services provider (MSSP) that delivers enterprise-grade cybersecurity as an outcome-focused, fully managed service under...
Ostro (Veeva Ostro) is an AI-powered brand engagement platform for life sciences. Founded in 2019 as RxDefine and legally incorporated as Rise Healthcare Tec...
Ostrom is a fully digital green-energy provider based in Berlin, Germany, offering variable, fixed, and dynamic electricity tariffs managed entirely through ...
Osu is a company surfaced as a portfolio company of creandum and added to the API Evangelist network as a stub for enrichment. Sector: fintech. This profile ...
Osyva is a B2B commerce and procurement platform for the veterinary supply sector in Colombia and Latin America ("Gestiona tus compras veterinarias"), connec...
Otis was an alternative-asset investing platform that let retail investors buy fractional shares in collectibles such as contemporary art, sneakers, trading ...
Otis Worldwide is the world's leading manufacturer, installer and servicer of elevators, escalators and moving walkways, serving customers in more than 200 c...
OTO (Oto Capital) is India's leading platform to discover, research, and buy two-wheelers online with embedded financing. It offers digital bike loans with e...
OTO is a multi-carrier shipping and fulfillment platform for e-commerce businesses, headquartered in Saudi Arabia and serving 10,000+ merchants. It connects ...
Otolith Labs, Inc. (trading as Otolith) is a privately held, clinical-stage medical device company headquartered at 200 Massachusetts Ave NW in Washington, D...
Otonomo operates a connected-vehicle data platform that aggregates, normalizes and delivers telematics and mobility data from millions of connected cars to f...
Otrafy is an AI-powered supplier management platform that automates regulatory compliance, supplier data collection, and supply chain risk assessment for QA,...
Open Cannabis Data for Your Technology. Otreeba comes from the word "abierto" which means "open." Otreeba offers standardized cannabis data and normalization...
Otrium is an online designer fashion outlet, headquartered in Amsterdam, that connects shoppers across Europe with end-of-season and overstock apparel, footw...
OTT Risk is a UK- and US-based insurtech Managing General Agent (MGA) building parametric, non-damage business interruption (NDBI) insurance for the digital ...
Otter (TryOtter) is a Restaurant Operating System used by hundreds of thousands of restaurants worldwide to aggregate delivery and online orders, consolidate...
Otter.ai is an AI-powered meeting transcription and conversational intelligence platform that automatically records, transcribes, and summarizes meetings acr...
Otterize is an open-source, Kubernetes-native platform for intent-based access control (IBAC). Application teams declare which services need to talk to which...
OtterTune was a database optimization ("on autopilot") start-up spun out of Carnegie Mellon University's database research group, operating from roughly 2020...
OTTO (myotto.net) is a Techstars-backed company surfaced as a portfolio lead and added to the API Evangelist network for enrichment. As of the July 2026 enri...
Ottonova is a Munich-based digital private health insurance provider (private Krankenversicherung) founded in 2015, positioned as "the insurance for the mobi...
Ottopay is a company surfaced as a portfolio company of kindred-ventures and added to the API Evangelist network as a stub for enrichment. This profile is a ...
Oula is a modern maternity and women's healthcare provider offering collaborative pregnancy, gynecology, preconception, and miscarriage care across New York ...
Oula Health (Oula) is a modern maternity and women's health provider operating collaborative-care clinics in New York and Connecticut. Oula pairs OBGYNs with...
Oumi (Open Universal Machine Intelligence) is an open-source, Apache-2.0 platform for ML engineers and researchers to train, fine-tune, evaluate, and deploy ...
Oumla is a Saudi-based provider of enterprise-grade digital asset infrastructure for regulated institutions. Its Core API delivers MPC-based wallet and addre...
Our Place is a direct-to-consumer kitchenware and cookware brand, best known for the multi-purpose Always Pan, selling cookware, bakeware, appliances, tablew...
Oura is a health-technology company that makes the Oura Ring — a titanium smart ring packed with PPG, body-temperature, SpO2, and motion sensors — and the Ou...
Oura Ring is a smart ring health tracking platform that provides a REST API for accessing sleep, activity, readiness, heart rate, daily health scores, and 50...
OurAirports is an open airport data platform maintained by a global community of aviation enthusiasts. It provides a comprehensive, community-maintained data...
OurCrowd is a global private-market investment platform that gives accredited and institutional investors access to curated venture and alternative-asset dea...
OurHealthMate was an Indian digital health-tech startup (a 500 Global / 500 Startups portfolio company) that let non-resident Indians book medical appointmen...
Ouro Medicines is a clinical-stage biotechnology company based in South San Francisco, California, defining the future of treatment for people with immune-me...
The OurPeople API uses common standards to allow easy read and write access to your data. OurPeople is a frontline communications platform that helps organiz...
Outbrain Inc. (NASDAQ: OB), which closed its acquisition of Teads in early 2025 and now operates publicly as Teads, is one of the largest open-internet a...
Outcomes4Me is a digital health company providing a personalized cancer care navigation platform for patients. The consumer app delivers personalized treatme...
Outdoor Voices is an Austin-founded direct-to-consumer activewear and athletic apparel brand designing clothing for everyday recreation — running, hiking, st...
Outdoorsy is an RV and campervan rental marketplace founded in 2014 and headquartered in Austin, Texas, connecting owners of recreational vehicles with trave...
Outer is a direct-to-consumer outdoor furniture brand founded in 2017 by Jiake Liu and Terry Lin and headquartered in Santa Monica, California, known for its...
Outerbounds is a fully managed platform for building and deploying production-grade AI, ML, and data systems, built on the open-source Metaflow framework ori...
Outerwall was a U.S. company specializing in automated retail with brands including Coinstar coin-counting kiosks and Redbox movie rental kiosks before being...
Outfittery is a European personal-shopping and personalized-fashion e-commerce service that curates and ships tailored outfits to customers based on a style ...
OUTFRONT Media is a U.S. out-of-home (OOH) advertising company and real estate investment trust (NYSE: OUT) operating a national portfolio of billboards, dig...
Outil Achats refers to French procurement and purchasing tools used by public and private sector organizations for managing tenders, suppliers, and contracts...
Outils de Gestion des Risques refers to risk management tools and services used in French-speaking business and regulatory environments, covering risk assess...
Outils de Tarification refers to pricing and tarification tools used in French-speaking business environments for managing pricing, tariffs, and cost calcula...
Outlier is a consumer online-education company that delivers college-level, for-credit courses (Calculus, Psychology, Financial Accounting, Computer Science,...
Outline is an open-source team knowledge base and wiki with a fully featured RPC-style REST API for programmatically managing documents, collections, teams, ...
OutlookSoft was a corporate performance management (CPM) software company providing budgeting, planning, consolidation, forecasting, and financial reporting ...
Outlyer is a company surfaced as a portfolio company of battery-ventures and added to the API Evangelist network as a stub for enrichment. This profile is a ...
Outpace Bio is a clinical-stage biotechnology company applying AI-powered protein design to cell therapy, with the mission of curing solid tumors. The compan...
Outpost is a Merchant of Record and Tax of Record platform for cross-border commerce, letting retailers sell into new markets while Outpost takes on the lega...
Outpost Bio builds frontier AI foundation models for the human microbiome. Its "lab-in-the-loop" platform pairs high-throughput wet-lab experiments with mach...
Output is a Los Angeles-based music software company founded in 2013 by composer and CEO Gregg Lehrman that makes creative virtual instruments, audio effects...
Outreach is a sales execution and revenue platform for go-to-market teams, unifying email, calling, social and meetings into sequenced outbound motions with ...
Outrider is an autonomous yard technology company that automates distribution yard operations with self-driving, all-electric yard trucks (hostlers). The Out...
Outright is a company surfaced as a portfolio company of uncork-capital and added to the API Evangelist network as a stub for enrichment. This profile is a l...
OutRival is a conversational AI platform that deploys AI agents ("Digital Workers" / companions) to handle high-volume customer engagement across voice calls...
Outschool is an education-technology marketplace for live, small-group online classes for learners ages 3-18. It connects families and independent teachers a...
Outscraper provides data scraping and extraction APIs for Google Maps, business data, reviews, and other web data sources. Filter and export company database...
Outset is an AI-powered qualitative research platform, operated by Parnassus Labs, Inc., that lets enterprise research and product teams run large-scale AI-m...
Outside.in was a hyperlocal news aggregation service that clustered blog posts and local news by geography ("placeblogging"), founded in 2006 and backed by U...
Outsite is a coliving and community platform for remote workers, digital nomads, and distributed teams. It operates a global network of fully-furnished coliv...
Outsmart (Outsmart Education) is an early-stage EdTech startup building a consumer, mobile-first learning experience for higher education in the age of AI — ...
Outsmart (Outsmart Education, Inc.) is an education-technology company rebuilding higher education for the AI era, aiming to make learning smarter, faster, a...
OutSystems is an enterprise low-code and AI-assisted application development platform company, founded in 2001 and headquartered in Boston, Massachusetts wit...
Outtake is an AI-powered digital risk protection (DRP) platform that autonomously detects and dismantles digital threats — brand impersonation, executive imp...
Outverse is an enterprise "service AI operating system" from Outverse Limited, a UK company backed by Seedcamp and Wing Venture Capital. Its platform lets su...
OvaScience was a Waltham, Massachusetts biotechnology company founded in 2011 (by Michelle Dipp, Richard Aldrich, Christoph Westphal, Jonathan Tilly, and Dav...
Ovation is an AI-first guest experience and feedback platform for restaurants, founded by Zack Oates and voted the #1 guest feedback platform in a Restaurant...
Overworld is an open-science AI research lab building interactive world models - AI-generated video environments that respond in real time to text prompts an...
OverDrive is a digital reading platform that distributes ebooks, audiobooks, and magazines to public libraries and schools worldwide, best known for its Libb...
Overflow is a fintech giving platform for churches and nonprofits that lets organizations accept and reconcile donations across many asset types — card and A...
Overhaul is an Austin, Texas based supply-chain visibility, integrity and risk-management platform founded in 2016 that monitors and protects in-transit carg...
Overjet is a dental AI platform that applies FDA-cleared computer vision to dental radiographs (bitewings, periapicals, panoramics, and CBCT) to detect, outl...
Overland AI is a Seattle- and Washington, DC-based defense technology company building autonomous ground vehicle systems for military and national-security a...
Overlay is a decentralized perpetual-futures protocol on BNB Smart Chain (chain id 56) that lets anyone trade and permissionlessly create markets for emergin...
OverOps (formerly Takipi) is a continuous reliability platform that helps teams who ship software ensure rapid code changes do not degrade the customer exper...
Overpass API is a read-only OpenStreetMap data API that enables querying geographic features including nodes, ways, relations, and tags using the Overpass Qu...
Overshoot is a real-time video understanding API. Developers create a live video stream, publish frames over WebRTC (LiveKit), then query what the camera see...
Overshoot is real-time AI vision infrastructure. It ingests live video streams over WebRTC (LiveKit) and lets developers query those frames with vision-langu...
Overstory provides AI-powered vegetation intelligence for electric utilities and grid operators. The platform fuses high-resolution satellite and aerial imag...
OverT Bio is a clinical-stage biotechnology company developing next-generation, programmed off-the-shelf (allogeneic) cell therapies and biologics for solid ...
Overtime is a sports media and entertainment company building disruptive, digital-first sports leagues and intellectual property aimed at the next generation...
Overture (Overture Life) is a privately held life-sciences company backed by GV and Khosla Ventures, operating in the reproductive-health and fertility techn...
Overture Maps Foundation is a Linux Foundation collaborative project that produces free, open, and interoperable map data. Overture publishes cloud-native Ge...
The Overture Maps Foundation is a Linux Foundation project created in partnership with Meta, Microsoft, AWS, and TomTom to build reliable, open map data as a...
Overwolf enables developers to build lightweight in-game applications and overlays using HTML and JavaScript. The platform provides APIs for game events, gam...
OVH Cloud is a leading provider of cloud computing services that offer a wide range of solutions for businesses of all sizes. From virtual private servers an...
OVIA is listed via wepow.com, the domain of Wepow, a video-interviewing and candidate-assessment startup backed by 500 Global. Wepow is now part of Harver, a...
Ovia Health (by Labcorp) is a digital women's and family health platform delivering evidence-based programs, personalized data insights, and Care Team suppor...
Ovintiv is a Fortune 500 oil and natural gas exploration and production company headquartered in Denver, Colorado. The company operates across North America ...
Oviva is a European digital health company, founded in 2014, delivering personalized, dietitian-led care for people managing type 2 diabetes, obesity, and ot...
OVO Energy is a United Kingdom household electricity and gas supplier founded in Bristol in 2009 by Stephen Fitzpatrick, and — after absorbing SSE's househol...
The Open Worldwide Application Security Project (OWASP) is a nonprofit foundation that works to improve the security of software through community-led open s...
The OWASP API Security Project focuses on strategies and solutions to understand and mitigate the unique vulnerabilities and security risks of Application Pr...
OWASP ZAP (Zed Attack Proxy) is an open source web application security scanner for finding vulnerabilities in APIs and web applications during development a...
Owens & Minor is a global Fortune 500 healthcare solutions company providing essential products and services to healthcare providers and manufacturers across...
Owens Corning is a global Fortune 500 building and industrial materials leader committed to building a sustainable future through material innovation, provid...
Owens-Illinois (now O-I Glass) is one of the world's leading manufacturers of glass containers, supplying glass packaging to the food, beverage, beer, wine, ...
Owkin is a French-American AI-biotech company (offices in New York, Paris, and London) that builds K Pro, an agentic "AI biology" platform for pharmaceutical...
Owl Labs is a Boston-based video conferencing hardware and software company building smart devices for hybrid meetings. Its flagship Meeting Owl line is a 36...
Owler is a crowdsourced competitive- and business-intelligence platform that maintains real-time profiles on more than 20 million public and private companie...
Owlet (Owletcare) is a baby-monitoring technology company that builds connected-nursery hardware and companion apps for parents. Its flagship Dream Sock is m...
OWLR (OWLR Technologies) is a London- and Fort Lauderdale-based consumer IoT company that builds universal remote-monitoring apps for home IP cameras, lettin...
Own (formerly OwnBackup, now Own from Salesforce) is a SaaS data protection platform that provides backup, recovery, archiving, sandbox seeding, and data sec...
Own Up is an AI-driven mortgage marketplace that helps borrowers shop for home loans by comparing personalized rate offers from a network of top-rated lender...
OwnBackup (Own Company) is a SaaS data protection platform providing backup, recovery, and sandbox seeding for Salesforce and other cloud applications.
Owner.com is an all-in-one, done-for-you digital platform for independent restaurants - an AI-built website with SEO, commission-free online and direct order...
OwnerRez is vacation-rental and short-term-rental property management software for hosts, owners, and property managers, covering channel management, booking...
OwnLocal is an Austin, Texas based automated digital advertising platform for local media companies, founded in 2010 by Lloyd Armbrust and Jason Novek. It he...
Oxa (formerly Oxbotica, rebranded in 2023) is a British autonomous vehicle software company founded in 2014 in Oxford, England by Paul Newman and Ingmar Posn...
Oxen.ai is a blazing-fast data version control system and AI platform for teams building with their own data. Its open-source Rust core (liboxen) versions, b...
Oxford Ionics is a quantum computing hardware company founded in Oxford, UK that designs and builds trapped-ion quantum computers powered by its proprietary ...
Oxford Science Enterprises (OSE) is an independent investment company and venture builder that transforms cutting-edge research from the University of Oxford...
OxfordCaps is a company surfaced as a portfolio company of 500-global and added to the API Evangelist network as a stub for enrichment. This profile is a lea...
Oxia is a scalable metadata store and coordination service designed for distributed systems, providing strong consistency guarantees and high availability. I...
Oxide Computer Company builds a rack-scale cloud computer: integrated server sleds (Gimlet), a rack-level switch (Sidecar), Oxide's own illumos distribution ...
Oximy is an AI adoption and governance platform — "the AI adoption engine for every company." It gives organizations visibility into how their people and app...
OXIO is a Telecom-as-a-Service (TaaS) platform that lets brands, enterprises, and fintechs launch and operate their own branded mobile networks (MVNOs) throu...
Oxygen was a US fintech neobank founded in 2018 and a Y Combinator graduate, offering banking, debit-card, and financial products aimed at gig-economy worker...
Oxylabs is a Lithuanian (Vilnius-based) web intelligence platform providing premium proxy networks (Residential, Datacenter, Mobile, ISP, Dedicated), web dat...
Oxyzo Financial Services is an RBI-registered Non-Banking Financial Company (NBFC) providing customized SME and corporate financing across India. Founded as ...
Oyi Labs is a company surfaced as a portfolio company of bloomberg-beta and added to the API Evangelist network as a stub for enrichment. This profile is a l...
OYO (Oravel Stays Limited) is an India-headquartered hospitality company that operates a franchise and aggregator platform for budget and mid-market hotels, ...
OYO Rooms (Oravel Stays / OYO Hotels & Homes) is a hospitality technology company headquartered in Gurugram, India that operates a global chain of franchised...
Global employment platform with a REST API for hiring international employees, managing contracts, processing global payroll, and ensuring local compliance i...
Oyster.com is a hotel review and travel-photography website owned by TripAdvisor, known for its in-person "Photo Fakeout" investigations and professionally s...
Oze is an African fintech platform on a mission to help small businesses grow, with a stated vision of building 100 million profitable businesses. Operating ...
Ozlo is a company surfaced as a portfolio company of battery-ventures and added to the API Evangelist network as a stub for enrichment. This profile is a lea...
OZON is one of Russia's largest e-commerce marketplaces, offering retail across electronics, apparel, groceries, and more, plus its own logistics and fulfill...
Ozow (formerly i-Pay) is a South African fintech providing an instant EFT / "Pay by Bank" payment gateway. Merchants create a server-side payment request, re...