Andreessen Horowitz (a16z)
Andreessen Horowitz (a16z) is a top-tier venture firm known for its platform model - providing portfolio companies with extensive operational support including recruiting, marketing, and business development beyond just capital.
Updated March 2026
What founders need to know
Andreessen Horowitz fundamentally changed how venture capital operates when Marc Andreessen and Ben Horowitz founded the firm in 2009. Their insight was that the best founders need more than money - they need help recruiting executives, closing enterprise deals, getting press coverage, and navigating regulatory challenges. So a16z built what they call a "platform" - a team of over 100 operating professionals who provide hands-on support to portfolio companies. This model has been widely copied but a16z arguably still does it best.
The firm manages over $35 billion across multiple funds covering venture, growth, crypto, games, and infrastructure. They are not afraid of controversy - their aggressive public advocacy for crypto, AI, and particular political positions distinguishes them from more conservative firms. For founders, this means a16z can be a powerful amplifier but also one that comes with associations. Their portfolio includes Facebook, GitHub, Coinbase, Figma, Roblox, and hundreds of other companies.
What makes a16z particularly distinctive is their content machine. Their blog, podcast (a16z Podcast), and newsletter reach millions of technologists and are a primary way they build dealflow. Founders who consume a16z content and engage with their thesis are more likely to get meetings. They publish detailed market maps and investment theses publicly, which means you can study exactly what they care about before pitching.
Investment focus
Software broadly: enterprise, consumer, crypto/web3, bio/health, games, AI infrastructure, fintech. a16z has dedicated funds for crypto and bio, each with specialized partners.
Investment stages and check sizes
Stages: Seed, Series A, Series B, Growth
Typical check size: Seed: $1M-$5M, Series A: $10M-$30M, Growth: $50M-$500M
Notable portfolio companies
- GitHub
- Coinbase
- Figma
- Roblox
- Databricks
- Instacart
- Slack
- Lyft
- OpenSea
What they look for in founders
a16z looks for founders building in markets they have strong conviction about. They publish detailed market maps and theses - if your company fits squarely into one of their published theses, your pitch is 10x easier. They prize technical founders with deep domain expertise and are comfortable with ambitious, contrarian bets. Their ideal founder can articulate not just what they are building but why the timing is perfect and why they are uniquely positioned to win.
Frequently asked questions
Related VC firms
Sequoia Capital
Sequoia Capital is one of the most successful venture capital firms in history, with early investments in Apple, Google, Airbnb, Stripe, and WhatsApp. They invest across all stages from seed to growth.
Benchmark
Benchmark is an elite venture firm known for its small partnership, equal carry structure, and focus on Series A investing. They are among the most selective VCs in the world, making only 8-12 new investments per year.
Founders Fund
Founded by Peter Thiel, Founders Fund invests in companies building transformative technology. They are known for contrarian bets and a "We wanted flying cars, instead we got 140 characters" philosophy that favors ambitious, hard-tech companies.
Explore more
Validate your idea before pitching Andreessen
Foundra helps you build the validation evidence that top VCs like Andreessen Horowitz (a16z) want to see. Structured process, strategy cards, market research — all before your first pitch.
Start your free trial3-day free trial. No credit card required.