Centri is an online cybersecurity training service offering self-paced courses, practical labs, and certification exams. Its catalog covers defensive security operations, incident response, digital forensics, threat intelligence, detection engineering, penetration testing, and security operations management. Learners can take free introductory courses or enroll in paid certification programs; organizations can purchase team training and monitor learner progress. It serves students, career changers, cybersecurity practitioners, and security teams seeking practical skills development.