Strikeforce is a U.S.-based mixed martial arts and kickboxing organization based in San Jose, California. It is headed by CEO Scott Coker and owned by Zuffa, LLC. Its live events and competitions are currently shown on CBS and Showtime in the United 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.

Strikeforce was founded as a kickboxing organization. It became involved with MMA in 2006 with the Strikeforce: Shamrock vs. Gracie event on March 10, 2006, at the HP Pavilion in San Jose, California.[1] The event was California's first regulated MMA event and broke the previous record for largest audience at a MMA event in the North America, with its 18,265 in attendance. The record was since broken by UFC 129.