The fast, easy, and affordable way to train your hacking skills.
challenge your hacking skills
Visitor access
- an open community for everyone
- train for free on various exercises
- see solutions proposed by the other members
- contribute to the foundation and get a contributor access
Contributor access 
- get rewarded for your creations
- contribute to moderation, proofreading solutions
- participate in creation and exercise tests
- contribute actively and get a free premium access
Premium access
- enjoy the latest exercises imagined by the contributors
- showcase your expertise with skills badges
- start a career in information systems security
- your subscription is used to finance the new challenges
School & company
- train your teams on professional environments
- follow the progress of your teams
- identify new talent
- organize your CTF during your events
589 Challenges
Hundreds of challenges are available to train yourself in different and realistic environments, offering you a way to learn a lot of hacking techniques!
176 Virtual Environnements
Dozens of virtual environments are available, accessible with a few clicks, to give you a realistic learning environment, without any limitation.
5839 Solutions
Each challenge is associated with a multitude of solutions, related resources allowing you to learn and to see the way followed by other users.
Get rewarded for your creations *
1 choose from the proposed subjects
2 validate your work
quality approved
3 get published and rewarded*
* Reserved for foundation members
They trust us
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