Flixster is an American social movie site for discovering new movies, learning about movies, and meeting others with similar tastes in movies. The site allows users to view movie trailers as well as learn about the new and upcoming movies in the box office. The site is based in San Francisco, California and was founded by Joe Greenstein and Saran Chari in 2007. Flixster has been the parent of website Rotten Tomatoes since January 2010. Flixster, including Rotten Tomatoes, was acquired by Warner Bros. on May 4, 2011.