The hands-on platform to master cybersecurity.
Learn with guided paths, hack real machines, capture flags and compete in live CTFs — then prove it with verified certificates.
Free forever plan No card required Beginner to advanced
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Registered hackers
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Hands-on challenges
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Learning paths
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Flags captured this week
RoboForge: Build an autonomous AI robot
Engineer the dataset, train and red-team the model, configure and wire the robot, then run a live warehouse mission in a 3D digital twin.
- 14 stages
- ~3 hours
- 3D digital twin
- Completes the path
// the platform
Everything you need to train like an operator
One account connects learning, practice, live competition and certification — so every hour you put in shows up on your profile.
// pick your target
Challenges for every skill level
Real attack techniques, clear difficulty ratings and points that count toward your global rank.
// learn with direction
Structured paths, from zero to operator
Every path combines short lessons, interactive labs and graded tasks, so you learn the concept and use it straight away.
- Beginner-friendly foundationsNetworking, operating systems, and security fundamentals.
- Practical in every moduleHands-on labs and simulations, not just slides.
- Certificates on completionProof you can share with employers.
Try it now · no signup
Capture your first flag in 30 seconds.
This is what a CSEMA challenge feels like: find the hidden flag, submit it, and see it accepted. No account and no download. If you get stuck, the hints will walk you through it.
- Beginner-friendly, no tools needed
- The same flag format used across the platform
- Real challenges get harder from here
[12:04:11] suspicious outbound traffic from 10.0.0.23
[12:04:11] payload captured, looks encoded:
Q1NFTUF7eTB1X2YwdW5kX3RoM19mbDRnfQ==
Decode it. The flag looks like CSEMA{…}
// global leaderboard
Your work earns its place on the board.
Every solve adds to your rank. Compete with the community, learn from stronger operators, and track how far you've come.
★★★★★“Challenging, fun, and a great way to sharpen your cybersecurity skills!”
★★★★★“I learned something new from every challenge I attempted.”
★★★★★“The best place to grow in the field of information technology.”
Compete, or Run Your Own
Join a live CTF as a competitor, or bring your organization and host one on CSEM - tickets, scoring, and the leaderboard, all handled for you.
// for teams & universities
Upskill your whole team or classroom.
Assign learning paths, run private CTF events, track progress per learner and issue certificates — all from one organisation account.
- Organisation dashboard
- Team & cohort management
- Private CTF events
- Verified certificates
// pricing
Start free. Upgrade when you're ready.
Create your account, explore the platform, and choose deeper access when your goals demand it.
Your first step is free
Create an account and start exploring challenges and learning paths.
Create free accountReady to capture your first flag?
Join free, pick a path or a challenge, and start building proof that you can do the work.