| tryhackme.com | Learn by following a structured paths and reinforce your skills in a real-world environment by completing guided, objective-based tasks and challenges. |
| cmdchallenge.com | Command Challenge |
| defendtheweb.net | Defend the Web is an interactive security platform where you can learn and challenge your skills. Try and complete all of our 60+ hacking levels |
| echoctf.red/ | hacking laboratories |
| exploit.education/ | exploit.education provides a variety of resources that can be used to learn about vulnerability analysis, exploit development, software debugging, binary analysis, and general cyber security issues. |
| Hackthebox.com | A Massive Hacking Playground |
| Letsdefend.io | LetsDefend helps you build a blue team career with hands-on experience by investigating real cyber attacks inside a simulated SOC. |
| pentesterlab.com | WE MAKE LEARNING WEB HACKING EASIER AND HELP LEVEL UP YOUR SKILLS |
| promptriddle.com | This is a pretty hard puzzle-solving game, can you beat it? |
| root-me.org | A fast, accessible and realistic platform to test your hacking skills.the root is long but the way is free |
| dojo.pwn.college | pwn.college Learn to hack! |
| ctf101.org | Capture The Flags, or CTFs, are a kind of computer security competition |
| ctf.hacker101.com | Whether you've just started your hacker journey or you're just looking for some new challenges, the Hacker101 CTF has something for you. |
| cryptopals.com | the cryptopals crypto challenges |
| cryptohack.org | A fun, free platform for learning modern cryptography |
| attackdefense.com | Attack and Defense |
| capturetheflag.withgoogle.com | Google will run the 2022 CTF competition in two parts: an online jeopardy-CTF competition, and a different on-site contest open only to the top 8 teams of the online jeopardy-CTF competition. |
| zenk-security.com | The main purpose of the Zenk-Security community is computer security, we are jacks of all trades, snoopers, we experiment at all costs and we share without any other restrictions than respect. |
| vulnmachines.com | A place to learn and improve penetration testing/ethical hacking skills for FREE. |
| picoctf.org | picoCTF is a free computer security education program with original content built on a capture-the-flag framework created by security and privacy experts at Carnegie Mellon University. |
| practicalpentestlabs.com | Take your Hacking skills to the next level. |
| overthewire.org | The wargames offered by the OverTheWire community can help you to learn and practice security concepts in the form of fun-filled games. |
| kaggle.com | Kaggle offers a no-setup, customizable, Jupyter Notebooks environment. Access GPUs at no cost to you and a huge repository of community published data & code. |
| hstrike.com | LEARN HACKING BY PLAYING AND COMPETING |
| pwn.tn | PWN.TN is an educational and non commercial wargame. |
| pwnable.kr | pwnable.kr' is a non-commercial wargame site which provides various pwn challenges regarding system exploitation |
| vulnhub.com | To provide materials that allows anyone to gain practical 'hands-on' experience in digital security, computer software & network administration. |
| w3challs.com | Our goal is to provide fun and unique challenges running in a real world environment, with no guessing and no simulation! |
| wechall.net | There exist lots of different challenge types. The most common ones are the following: Cryptographic, Crackit, Steganography, Programming, Logic and Math/Science. The difficulty of these challenges vary as well. |