Hacker101 offers a free web security class with lessons and Capture the Flag challenges.
CTF101
vsCTF Sites
CTF101 vs CTF Sites
How do CTF101 and CTF Sites compare? Here are the facts side by side: pricing, platforms, open-source status and what each one is for.
| Directory detail | CTF101 | CTF Sites |
|---|---|---|
| What it is | The CTF101 wiki introduces Capture the Flag competitions and explains related security concepts. | CTF Sites lists Capture the Flag sites and provides a directory for finding cybersecurity challenges. |
| Website | ||
| Type | Website | Website |
| Topic | ||
| Pricing | Not confirmed | Not confirmed |
| Platforms | Web | Linux, Web |
| Open source | Not stated | Not stated |
| Language | English | — |
| Alternatives |
Other options to consider
Sites similar to both CTF101 and CTF Sites.
CTFtime lists upcoming and past Capture the Flag events, teams, tasks, ratings, and writeups.