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Venture capital firm

Andreessen Horowitz (a16z)

Silicon Valley venture capital firm investing from seed to growth stage across technology sectors

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About Andreessen Horowitz (a16z)

Andreessen Horowitz, known as a16z, is a venture capital firm in Silicon Valley, California. Marc Andreessen and Ben Horowitz started it in 2009, and it invests in technology founders from seed to growth stage.

What Andreessen Horowitz does

  • Venture funding: investing across seed, venture and growth stages.
  • Operating platform: an in-house team of marketing, talent, legal and policy staff that supports portfolio founders.
  • Sector focus: artificial intelligence, bio and healthcare, consumer, crypto, enterprise, fintech, games and infrastructure.
  • American dynamism: backing companies in areas like aerospace, defence, manufacturing and robotics.
  • Research and media: guides, growth benchmarks, articles, podcasts and videos.

Who it serves

The firm backs founders and builders at all stages. Its investors are largely former founders and operators.

Key facts

  • Based in: Silicon Valley, California, USA
  • Founded: 2009
  • Founders: Marc Andreessen and Ben Horowitz

Profile written by TrustList from the business's own published information, Oct 2026.

Categories & features

Rankings

As of 2026-10-08. Organic ranks only; sponsored placements are never ranks.

What the business tells TrustList

Founded
2009 (17 years) evidence sent

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