a16z

Updated 2026-04-10

Andreessen Horowitz, usually shortened to a16z, is one of the most influential venture-capital firms in Silicon Valley. Founded in 2009 by Marc Andreessen and Ben Horowitz, it became famous for early investments in Facebook, Twitter, Airbnb, GitHub, Coinbase, and many other platform companies.

a16z is not only a capital provider. It actively shapes opinion across tech, crypto, AI, and biology through podcasts, essays, and public positioning. The firm often serves as the intellectual voice of a specific Silicon Valley optimism: technology as the solution to social and economic problems.

Connections

  • Balaji Srinivasan - former general partner at a16z, especially influential on decentralization and AI theses
  • Product Builder - a16z invests heavily in tools and platforms that support this shift
  • Vibe Coding - adjacent to a16z-style arguments about AI-native software development

Sources