There have been many great MMA organizations over the years, but here are five that are widely regarded as among the best of all time: Ultimate Fighting Championship (UFC) - UFC is the biggest and most successful MMA organization in the world, with a long history of showcasing the best fighters in the sport. Pride Fighting Championships - Pride was a Japanese MMA organization that was active from 1997 to 2007. It was known for its grand production values and for featuring some of the best fighters in the world at the time. Strikeforce - Strikeforce was a U.S.-based MMA organization that was active from 2006 to 2013. It featured some of the best fighters in the world and was known for its high production values and exciting fights. Bellator MMA - Bellator is a U.S.-based MMA organization that has been active since 2008. It has grown rapidly in recent years and features many top fighters in the sport. World Extreme Cagefighting (WEC) - WEC was a U.S.-based MMA organization that was