Marc Andreessen — Notable For: Co-created Mosaic web browser (1993); founded Netscape (sold to AOL for $4.2B); co-founded Andreessen Horowitz managing $90B+ in venture capital; techno-optimist AI advocate opposing safety regulation

NoteThe source confirms most claims: (1) Mosaic co-creation in 1993 ✓; (2) Netscape founding and AOL acquisition ✓ but with a discrepancy: source states $4.3 billion (1999), claim states $4.2B; (3) Andreessen Horowitz co-founding ✓; (4) Techno-optimist advocate ✓ (published manifesto in October 2023). However, the claim about 'managing $90B+ in venture capital' is unverifiable from the source—the source mentions initial capitalization of $300M (2009), growth to $2.7B within three years, and a 2025 seed round of $2B, but does not state current AUM as $90B+. Most critically, the source does NOT explicitly state that Andreessen opposes AI safety regulation—it only confirms he is a 'techno-optimist' and published a manifesto. The claim's assertion about 'opposing safety regulation (as of 2026-03)' is not directly addressed in the source text provided. The AOL acquisition price discrepancy ($4.3B vs $4.2B) is minor (~2.3% difference) but technically contradicts the claim.