Back مارك آندرسن Arabic مارك أندرييسن ARY مارك آندرسن ARZ Марк Андрийсън Bulgarian Marc Andreessen Catalan مارک ئەندریسن CKB Marc Andreessen Czech Marc Andreessen German Μαρκ Αντρίσεν Greek Marc Andreessen Esperanto
Marc Lowell Andreessen (born July 9, 1971) is an American businessman and former software engineer. He is the co-author of Mosaic, the first widely used web browser with a graphical user interface; 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. He is an inductee in the World Wide Web Hall of Fame. Andreessen's net worth is estimated at $1.7 billion.