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Marc Andreessen

Marc Andreessen

Occupation: investor, entrepreneur and software engineer

Birthday: July 9, 1971

Age: 50

Birthplace: Cedar Falls, Iowa, U.S.

Nationality: United States

Birth Sign: Cancer


Marc Lowell Andreessen is the co-author of Mosaic, the first widely used web browser; co-founder of Netscape; and co-founder and general partner of Silicon Valley venture capital firm Andreessen Horowitz. He also sits on the board of directors of Meta Platforms. 

Marc Andressen Career

Andreessen was born in Iowa, and raised in Wisconsin. In 1993, he graduated with a bachelor’s degree in computer science from the University of Illinois at Urbana–Champaign. As an undergraduate, he interned twice at IBM in Austin, Texas.

marc andreessen college

He worked in the AIX graphics software development group which was responsible for the MIT X Window implementation and ports of the 3D language APIs. He also worked at the National Center for Supercomputing Applications at the University of Illinois, where he became familiar with open standards for the World Wide Web


marc andreessen netscape

After his graduation in 1993, Andreessen moved to California to work at Enterprise Integration Technologies. Andreessen then met with Jim Clark, the founder of Silicon Graphics. Clark believed the Mosaic browser had great commercial possibilities and suggested starting an Internet software company. Soon, Mosaic Communications Corporation was in business in Mountain View, California, with Andreessen as co-founder and vice president of technology. It was originally called Mosaic so the team changed its name to Netscape.

Netscape’s IPO in 1995 put Andreessen into the public eye when he was featured on the cover of Time.

marc andreessen time

Netscape was acquired in 1999 for $4.3 billion by AOL. Andreessen’s hiring as its Chief Technology Officer was contingent on the completion of the acquisition.


After AOL acquired Netscape in late 1998, Andreessen went on to found Opsware with Ben Horowitz, and others. Originally named Loudcloud, the company provided computing, hosting and software services to consumer facing internet and e-commerce companies. Loudcloud sold its hosting business to EDS and changed its name to Opsware in 2003, with Andreessen serving as chairman. Acquired by Hewlett-Packard for $1.6 billion in 2007, it was one of the first companies to offer software as a service and to attempt cloud hosting.

Andreessen Horowitz

Andreessen Horowitz

Between 2005 and 2009, Andreessen and longtime business partner Ben Horowitz separately invested a total of $80 million in 45 start-ups that included Twitter and soon the duo became well known as super angel investors. In 2009, Andreessen and Horowitz announced their Silicon Valley venture-capital firm Andreessen Horowitz. Within three years the firm grew from $300 million to $2.7 billion under management across three funds

Investments include:

  • Facebook
  • Coinbase
  • Foursquare
  • Slack
  • GitHub
  • Skype
  • Affirm
  • Pinterest
  • Twitter

The group is known for betting huge sums of money on deals such as Skype.


Andreessen serves on the board of Facebook, Hewlett Packard Enterprise, Stanford Hospital,  Anki, Oculus VR, OpenGov, Dialpad, and TinyCo.

marc andreessen companies

Andreessen serves on an advisory board for Neom, Saudi Arabia’s plan to build a futuristic megacity in the desert

Marc Andreessen Net Worth: $1.5 billion

Marc Andreessen’s first claim to fame was cofounding web browser firm Netscape, which AOL bought for $4.2 billion, but Andreessen’s biggest score was as a seed investor in Facebook. He also cofounded Loudcloud, which, renamed Opsware, sold to Hewlett-Packard for $1.6 billion and grown one of the largest venture funds in the world. 

Marc Andreessen’s Favorite Books

Marc Andreessen’s Homes

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