Ctf servers
23 measured server(s) with the Ctf sub-topic, ranked by real members. Browse topics →
| Server | Members | Online | Active |
|---|---|---|---|
1 Hacker101 | 77,309 | 3,687 | 4.8% |
2 pwn.college | 42,283 | 5,970 | 14.1% |
3 Dropout Phreaks | 26,810 | 3,108 | 11.6% |
4 CyLab Security Academy (formerly picoCTF) | 24,817 | 2,176 | 8.8% |
5 Blue Team Labs Online ☁ | 6,742 | 373 | 5.5% |
6 DownUnderCTF | 5,219 | 775 | 14.8% |
7 CyberTalents | 2,276 | 83 | 3.6% |
8 UofTCTF | 1,465 | 258 | 17.6% |
9 EDU CTF Course | 1,291 | 188 | 14.6% |
10 THJCC CTF | 1,282 | 231 | 18.0% |
11 𝐒𝐞𝐜𝐄𝐧𝐭 | 1,146 | 121 | 10.6% |
12 CTF-RU | 625 | 31 | 5.0% |
| 13 PicoCTF_Africa | 609 | 21 | 3.4% |
14 GreHack 2026 | 569 | 136 | 23.9% |
15 Capture the Flag Club | 562 | 40 | 7.1% |
16 The Hack Pack | 459 | 61 | 13.3% |
17 CTFClub | 418 | 16 | 3.8% |
18 CSCGR (Cyber Security Challenge Greece) | 293 | 49 | 16.7% |
19 Barracks HQ | 285 | 20 | 7.0% |
20 UW-Stout CTF | 263 | 36 | 13.7% |
21 Nigeria National CTF | 51 | 7 | 13.7% |
22 Century College CCDC team | 49 | 4 | 8.2% |
23 ☕ | WebDevs Plataform | 15 | 2 | 13.3% |