Andreessen Horowitz
 | |
| Andreessen Horowitz | |
| Formerly | AH Capital Management, L.L.C. |
| Type | Private |
| Industry | Venture capital |
| Founded | July 6, 2009 |
| Founders | Marc Andreessen Ben Horowitz |
| Headquarters | , U.S. |
| AUM | >US$100 billion (2026) |
Number of employees | >500 (2024) |
| Website | a16z |
Andreessen Horowitz (also known as a16z) is an American privately-held venture capital firm headquartered in Menlo Park, California, United States. It was founded in 2009 by Marc Andreessen and Ben Horowitz. The number "16" in the name comes from the letter count between the first letter in Andreessen and the last letter in Horowitz.
Andreessen Horowitz invests in both early-stage startups and established growth companies. Its investments span the healthcare, consumer, cryptocurrency, gaming, fintech, education, and enterprise software (including cloud computing, security, and software as a service) industries.
As of January 2026, the company has $90 billion in assets under management.