Marc Andreessen
Marc Andreessen | |
|---|---|
 Andreessen in 2013 | |
| Born | Marc Lowell Andreessen July 9, 1971 Cedar Falls, Iowa, U.S. |
| Education | University of Illinois Urbana-Champaign (BS) |
| Occupations | |
| Known for | |
| Spouse | |
| Children | John |
| Relatives | John Arrillaga (father-in-law) |
| Website | a16z |
Marc Lowell Andreessen (/ænˈdriːsən/ an-DREE-sən; born July 9, 1971) is an American businessman, venture capitalist, and former software engineer. He is the co-author of Mosaic, the first web browser to display inline images; co-founder of Netscape; and co-founder and general partner of Silicon Valley venture capital firm Andreessen Horowitz.
He co-founded and later sold the software company Opsware to Hewlett-Packard; he also co-founded Ning, a company that provides a platform for social networking websites. In 2024, he became an advisor to Donald Trump.
As of June 2026, Forbes estimated Andreessen's net worth at $1.9 billion.