Andreessen Horowitz
Andreessen Horowitz (a16z) is a Silicon Valley venture capital firm founded in July 2009 by Marc Andreessen and Ben Horowitz and headquartered in Menlo Park, California. The firm invests across the full lifecycle from seed to venture to growth-stage technology companies, deploying stage-based checks that range from roughly $1M-$5M into early application bets up to hundreds of millions of dollars into its largest AI positions. a16z organizes around dedicated practice areas: AI, American Dynamism, Bio + Healthcare, Consumer, Crypto, Enterprise, Fintech, Games, Infrastructure, plus specialty vehicles including the Cultural Leadership Fund, Perennial, and the Speedrun accelerator. With over $90B-$100B+ in assets under management as of early 2026 and a public portfolio of more than 1,000 companies, a16z is one of the largest and most influential venture firms in the world, known for its operator-led platform model and notable investments including Airbnb, Coinbase, GitHub, Figma, Stripe, Databricks, Anduril, and OpenAI.
Andreessen Horowitz is tracked in the API Evangelist network. This page is the human-readable profile that sits on top of the machine-readable index we maintain at apis.io.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Andreessen Horowitz is in the network as a tracked entity. We haven't yet indexed a public API surface for it — when one is published, the artifacts, score, and agent-readiness read will appear here automatically. The source repository is where that profile is built.
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