Strikeforce was a U.S.-based mixed martial arts and kickboxing organization based in San Jose, California which operated from 1985 (as MMA organization from 2006) to 2013. It was headed by CEO Scott Coker. Its live events and competitions have been shown on CBS (debut on November 7, 2009) and Showtime in the Unted States, Super Channel in Canada, Primetime in the United Kingdom, SKY PerfecTV! in Japan, HBO Plus in Brazil, Space TV in Latin America and the Caribbean, and on the American Forces Network.
In early 2011, Strikeforce was purchased by UFC owner Zuffa LLC, which eventually closed the promotion and brought the remaining fighter contracts into the Ultimate Fighting Championship roster.