Industry-standard CTF lab with real-world machines. Covers Active Directory, web, binary exploitation, and more. Where the serious players grind.

Beginner-friendly guided rooms with step-by-step learning paths. Best starting point if you're new to ethical hacking and CTFs.

Carnegie Mellon's free CTF platform. Excellent for learning binary exploitation, forensics, and cryptography fundamentals from scratch.

The definitive web hacking training by the makers of Burp Suite. Covers every major OWASP vulnerability with interactive labs.

Arizona State University's free binary exploitation course platform. Deeply structured — from assembly basics all the way to kernel exploitation.

Global CTF event tracker and team leaderboard. Find upcoming competitions, read writeups from top teams, and track your progress.