Established in 2003, the Wikimedia Foundation is a non-profit organization that operates Wikipedia and its sister projects. The foundation is headquartered in San Francisco, California, and employs approximately 500 staff members as of 2023. The Wikimedia Foundation's mission is to provide free knowledge to people all around the world. In the fiscal year 2022, the foundation raised about $129 million, primarily from small individual donations, to fund its projects.