The OSS Fighters is a Romanian kickboxing gym and promotion.

The company was founded in 2018, being one of the largest kickboxing promotions in Romania, alongside the Dynamite Fighting Show and the Colosseum Tournament.

The OSS Fighters are in partnerships with the Superkombat Fighting Championship (SUPERKOMBAT), the World Kickboxing Federation (WKF) and the World Kickboxing and Karate Union (WKU).

[2][3][4] In 2020, OSS Fighters started airing live events on Sport Extra with the debut event on Sport Extra being OSS Fighters 05,[5] ending the partnership with FightBox.

[7] One Star Security has been a major sponsor of OSS Fighters since its inception.