Andreessen Horowitz

Founded in 2009 by Marc Andreessen and Ben Horowitz, Andreessen Horowitz (a16z) quickly rose to become one of the most powerful and respected venture capital firms in Silicon Valley. The firm began with a $300 million fund and rapidly scaled its operations, managing billions within its first few years. It is known for its prolific investing across multiple stages of company growth and its significant impact on the technology ecosystem.

The firm operates through several specialized funds, including the American Dynamism fund which supports companies building in the national interest such as defense, robotics, and manufacturing. Other major focuses include cryptocurrency (a16z crypto), bio and healthcare, and gaming. In 2026, the firm significantly expanded its capital base by raising $15 billion across five new funds, bringing its total assets under management to approximately $90 billion.

Andreessen Horowitz is recognized for its proactive support of startups, often referred to as Little Tech, and its expansion into non-traditional venture assets like crypto tokens and public equities. The firm maintains a massive portfolio of over 1,000 companies and has backed more unicorns since 2020 than any other venture firm. Notable historical successes include early bets on Skype, Instagram (via Facebook), and GitHub.