Marc Andreessen
American software engineer, entrepreneur and venture capitalist; co-founder and general partner of Andreessen Horowitz (a16z).
Career
- Born 1971-07-09; BS in computer science, University of Illinois Urbana-Champaign (1993). Co-created the Mosaic web browser (1993) there (Wikipedia).
- Co-founded Netscape (founded 1994 as Mosaic Communications; IPO 1995); sold to AOL in 1999 (a16z bio: $4.2 billion).
- Co-founded Loudcloud (renamed Opsware in 2003) with Ben Horowitz and others; sold to Hewlett-Packard in 2007 (reportedly $1.6 billion; not checked against a primary source).
- Co-founded a16z with Ben Horowitz in 2009 (Wikipedia: July 2009, initial $300 million fund). Portfolio spans consumer, enterprise, crypto and AI.
- Boards: Meta; also a16z portfolio companies such as Coinbase, Carta, Samsara, Dialpad (a16z bio).
Writing
- “Why Software Is Eating the World”, Wall Street Journal, August 2011 (per Wikipedia).
- “The Techno-Optimist Manifesto”, October 2023 (per Wikipedia).
Related
Andreessen Horowitz, Ben Horowitz
Sources
- https://a16z.com/author/marc-andreessen/ (primary, fetched 2026-10-05)
- https://en.wikipedia.org/wiki/Marc_Andreessen (secondary, fetched 2026-10-05)
Open items
- Wikipedia reports an appointment to the US President’s Council of Advisors on Science and Technology announced March 2026; not confirmed against a primary source, so not asserted here.
- The earlier note’s claim of specific AI-sector predictions was unsourced and removed.