Host CTFs that actually work
Run dynamic, scalable CTFs for training, conferences, recruiting, and student clubs. Per-player infrastructure, dynamic flags, and live scoring — all hosted, no servers to provision.
Built for serious CTFs
Everything you need to run a real competition
Built for stability and fairness under real-world load — from 10-person internal events to 10,000-player public competitions.
- Unique Infrastructure Per Player
Every participant gets their own dedicated environment. No more sharing instances or fighting for resources. Each player has a fresh, isolated challenge environment.
- Dynamic Flags
Eliminate cheating with dynamic flags generated uniquely for each player and team. Flag sharing becomes impossible when everyone hunts for a different hash.
- Completely Hosted
Forget about provisioning servers, configuring firewalls, or managing Docker containers. We handle the entire infrastructure so you can focus on the competition.
- Effortless Scaling
Whether you have 10 participants or 10,000+, our platform scales instantly to meet demand. Run massive events without worrying about infrastructure limits.
Ready to launch your next CTF?
Join the security training companies, conferences, and university teams running their CTFs on CourseStack.