OffSec

OffSec (formerly Offensive Security) is an American cybersecurity training and certification company founded in 2006 and headquartered in New York City. The company is best known for creating Kali Linux, the industry-standard penetration testing Linux distribution, and for developing the Offensive Security Certified Professional (OSCP) certification, widely regarded as one of the most rigorous and respected hands-on cybersecurity credentials. OffSec delivers training through live labs, enterprise cyber ranges, and practical courses for penetration testers, red teamers, and security professionals. The company also maintains the Exploit Database (ExploitDB) and Metasploit Unleashed as free community resources.