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Andreessen Horowitz, commonly referred to as a16z, is a prominent venture capital firm founded in 2009 by Marc Andreessen and Ben Horowitz in Menlo Park, California. The firm has rapidly ascended to become one of the largest venture capital firms globally, managing over $90 billion in assets. A16z commands approximately 18% of all venture capital dollars allocated in the United States, reflecting its significant influence in the industry.
In January 2026, a16z raised $15 billion across five new funds, including a $6.75 billion growth fund and a $3.5 billion fund dedicated to AI applications. This fundraising followed a $7.2 billion raise in April 2024, showcasing the firm's ability to attract substantial capital. A16z operates with a team of 470 members, including 311 partners, making it one of the largest VC organizations in the world.
The firm has pioneered the
a16z invests across various stages, from seed to growth, with check sizes ranging from $750K to $500M. Key sectors include AI, fintech, gaming, and generative AI, with a strong emphasis on backing non-consensus founders and bold ideas.
a16z has invested in 10 of the top 15 most valuable private companies, including OpenAI, SpaceX, and Stripe. The portfolio includes over 1,076 companies, 121 unicorns, and 35+ public offerings.
Marc Andreessen and Ben Horowitz are the co-founders. Key partners include Scott Kupor, Jeff Jordan, Chris Dixon, and Katherine Boyle.
Founders can pitch a16z through their website or the Speedrun accelerator program, which accepts pitches from various industries.
The Speedrun accelerator invests up to $1M per company across approximately 60 startups per cohort.
In January 2026, a16z raised $15 billion across five new funds, including $6.75B for growth and $3.5B for AI applications.
What stages does a16z invest in?
a16z is stage-agnostic, investing from seed through growth equity and pre-IPO.
What sectors does a16z focus on?
The firm focuses on AI, fintech, gaming, bio/health, consumer applications, and cryptocurrency.
How much capital does a16z typically invest?
Check sizes range from $750K to $500M, depending on the stage and opportunity.
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