Zynga is a provider of social video game services founded in July 2007 and headquartered in San Francisco, California, United States. The company develops social games that work stand-alone on mobile phone platforms such as Apple iOS, Android, Windows Phone and on the Internet through its website, Zynga.com, and social networking websites such as Facebook, Google+, and Tencent QQ. Zynga states its mission as "connecting the world through games." The company was named in honor of Zinga, CEO Mark Pincus's deceased American bulldog.Zynga launched what is considered its best-known game, FarmVille, on Facebook in June 2009, reaching 10 million daily active users (DAU) within six weeks. As of early January 2013, Zynga games had over 265 million monthly active users (MAU), and three of the top five Facebook games (in terms of MAU, according to AppData) were Zynga titles: FarmVille 2, Texas HoldEm Poker (now known as Zynga Poker), and ChefVille. According to the BBC, around 80 percent of Zynga's revenue comes from Facebook users, but its formal partnership with Facebook ended on March 31, 2013.