OffSec

OffSec (formerly Offensive Security) is a cybersecurity training and certification company founded in 2006. It provides hands-on, practical education in penetration testing and offensive security techniques, best known for developing the Kali Linux distribution and its Penetration Testing with Kali Linux (PWK) course. The company offers a range of technical certifications, including the widely recognized OSCP (Offensive Security Certified Professional), along with other credentials covering web application security, exploit development, and advanced penetration testing. Training materials include self-paced courses, virtual labs, and proctored exams designed to test practical, applied skills rather than theoretical knowledge. OffSec's customer base includes individual security professionals seeking certification, as well as enterprises and government organizations that use its training platform to build internal security team skills. The company operates as a globally distributed organization with employees located across more than 24 countries, working remotely since its founding. In addition to certification programs, OffSec maintains open-source security tools and resources used broadly within the penetration testing and information security community, and it continues to expand its content library to address emerging areas such as AI-related security threats.