About Wikimedia Foundation, Inc.

Want free access to the sum of all human knowledge? Wikimedia Foundation can give it to you. The not-for-profit organization has produced a plethora of free-content wiki projects, including one of the most visited sites on the Internet, online collaborative encyclopedia Wikipedia (the foundation's first project). The term wiki (a Hawaiian word for "fast") describes a collection of Web pages designed to enable anyone with Internet access to contribute or modify content.  Wikimedia has a paid staff of about 280, while hundreds of thousands of volunteers contribute content. The Wikimedia Foundation is funded primarily through donations and grants, and was founded by Internet entrepreneur Jimmy Wales and philosopher Lawrence Sanger in 2001. 

The company uses MediaWiki, a Web-based software application Wikimedia developed for its user interface. The free and open source software has since been been adopted by other companies for internal content management use.

In 2009 Wikipedia grew to include more than 2.8 million English articles. All total, it offers more than 11 million articles in some 260 languages. In addition to Wikipedia, other online collaborative wiki projects include Wikimedia Commons, a repository of more than four million free images, videos, and sound files; Wiktionary, a free dictionary site; and Wikisource, an original source repository.

Wikepedia has been the subject of criticism for being un-authoritative and unreliable. For example, comedian Stephen Colbert has noted that the site has a "longer entry on 'light sabers' than it does on the 'printing press.'"

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Wikimedia Foundation, Inc.

149 New Montgomery St #6
San Francisco, CA 94105-3739
Phone: 1 (415) 839-6885


  • Employer Type: Private Non Profit
  • Chief of Finance and Administration and Chief of Finance and Administration: Garfield Byrd
  • Manager: Jon Katz
  • Chief Communications Officer: Katherine Maher

Major Office Locations

  • San Francisco, CA