The Wikimedia Foundation, Inc., abbreviated WMF, is an American 501(c)(3) nonprofit organization headquartered in San Francisco, California, and registered there as a charitable foundation. It is the host of Wikipedia, the seventh most visited website in the world. In addition, the foundation hosts 14 other related content projects. It supports the development of MediaWiki, the wiki software that underpins them all.
Wikimedia Foundation servers
Wikimedia Foundation revenue, expenses and end-of-year net assets (in US$), 2003–2023 Green: revenue (excluding direct donations to the endowment) Red: expenses (including WMF payments into the endowment) Black: net assets (excluding the endowment)
Wikimedia Foundation and chapters finance meeting 2012, Paris
Foundation staff in January 2019
Wikipedia is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the use of the wiki-based editing system MediaWiki. Wikipedia is the largest and most-read reference work in history. It is consistently ranked as one of the ten most popular websites in the world, and as of 2024 is ranked the fifth most visited website on the Internet by Semrush, and second by Ahrefs. Founded by Jimmy Wales and Larry Sanger on January 15, 2001, Wikipedia is hosted by the Wikimedia Foundation, an American nonprofit organization that employs a staff of over 700 people.
Wikipedia
American journalist John Seigenthaler (1927–2014), subject of the Seigenthaler incident
Katherine Maher, the third executive director of Wikimedia, served from 2016 to 2021.
Wiki translation AI
