OpenSecurityTraining Inc. (EIN 86-1180701) is a 501(c)(3) non-profit working to create the world's best cybersecurity training.

"OpenSecurityTraining.info" was OST1, and it was started by Xeno Kovah in 2011 to host his own classes, and those of other colleagues from MITRE. It was never a formal organization, just a site Xeno ran in his free time. As Xeno remakes his OST1 material for OST2, he's taking down the previous materials, to make sure students get the best experience possible. But each instructor can make their own choice in that regard.