1
Hackers101
hacker101.comSame kind of website
Hacker101 offers a free web security class with lessons and Capture the Flag challenges.
Alternatives
The Best CTF Sites Alternatives in 2026
3 alternatives
Looking for something like CTF Sites? Here are 3 alternatives, ranked by how closely they match it on purpose, features and platforms.
CTF Sites lists Capture the Flag sites and provides a directory for finding cybersecurity challenges.
Top picks at a glance
First suggestionHackers101Hacker101 offers a free web security class with lessons and…Another optionCTFtimeCTFtime lists upcoming and past Capture the Flag events…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Hackers101 | — | Not stated | Web |
| 2 | CTFtime | — | Not stated | Web |
| 3 | CTF101 | — | Not stated | Web |
All CTF Sites alternatives
2
CTFtime
ctftime.orgSame kind of website
CTFtime lists upcoming and past Capture the Flag events, teams, tasks, ratings, and writeups.
3
CTF101
ctf101.orgSame kind of website
The CTF101 wiki introduces Capture the Flag competitions and explains related security concepts.
No alternatives match this filter.
Alternatives to similar tools
What is the best alternative to CTF Sites?
Based on features, tags and platforms, the closest alternatives to CTF Sites are Hackers101, CTFtime, and CTF101.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative