Portrait of Marc Andreessen.

Marc Andreessen

Builder of Browser Companies

A programmer, founder and investor who helped make the graphical web accessible, then built companies around its expansion.

Window to the Web
Helped make networked documents visually approachable.
Company Formation
Turns a technical shift into an organisation.
Protocol Bets
Invests around platforms and their second-order effects.

Marc Andreessen

Builder of Browser Companies

Start hereNCSA MosaicNCSA team; key programmers Marc Andreessen and Eric BinaExplore source
1971-1992

Programming and the early internet

Andreessen studied computer science at the University of Illinois and worked at NCSA.

1994-1999

Netscape

Andreessen co-founded Mosaic Communications with Jim Clark, renamed Netscape, where teams built Navigator and server products.

2009-present

Andreessen Horowitz

After Loudcloud/Opsware and board roles, Andreessen co-founded a16z with Ben Horowitz.