Wikimedia Foundation

The Wikimedia Foundation (WMF) is an American non-profit and charitable organization headquartered in San Francisco, California, that operates many wikis. The foundation is mostly known for hosting Wikipedia, an Internet encyclopedia which ranks in the top-ten most-visited websites worldwide; as well as Wiktionary, Wikiquote, Wikibooks, Wikisource, Wikimedia Commons, Wikispecies, Wikinews, Wikiversity, Wikidata, Wikivoyage, Wikimedia Incubator, and Meta-Wiki. The organization was founded in 2003 by Jimmy Wales, co-founder of Wikipedia, as a way to fund Wikipedia and its sister projects through non-profit means. As of 2015, the foundation employs around 250 people, with annual revenues in excess of US$50 million.

The organization's staff sometimes impose global bans, or global locks, on users who are believed to have engaged in pedophile apologism.