WikiSpaces is a free web hosting service (sometimes called a wiki farm) based in San Francisco, California. Launched in March 2005, Wikispaces is owned by Tangient LLC and is among the largest wiki hosts, competing with PBworks, Wetpaint, Wikia, and Google Sites (formerly JotSpot). Private wikis with advanced features for businesses, non-profits and educators are available for an annual fee. As of March 2008, they had more than 920,000 registered members and hosted more than 390,000 wikis. By March 2009, that number had increased to over 2.2 million registered members and more than 900,000 wikis. Wikispaces has also given away more than 100,000 premium wikis to K-12 educators. Since 2010, Wikispaces have cooperated with web 2.0 education platform Glogster EDU. Glogster EDU embeds Glogs into Wikispaces services.