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CTF servers

150 measured server(s) with the CTF sub-topic, ranked by real members. Browse topics →

ServerMembersOnlineActive
1 HackTheBoxverified385,07538,77210.1%
2 TryHackMeverified372,31233,5299.0%
3 OwlSecpartner163,76717,00210.4%
4 JH Discord30,1483,82212.7%
5 Root-Me28,3484,54916.0%
6 OverTheWire27,5413,06211.1%
7 SANS Holiday Hack Challenge19,2631,8089.4%
8 ImaginaryCTF14,1641,92413.6%
9 CTFlearn12,1041,0098.3%
10 Hack This Fall Community11,8052011.7%
11 CryptoHack10,7491,82917.0%
12 SECCON Beginners CTF6,7521,02115.1%
13 crackmes.one6,6671,53022.9%
14 FCSC & Hackropole6,1181,12518.4%
15 SkillBit (formerly MetaCTF)5,96168411.5%
16 GoogleCTF5,55799017.8%
17 SekaiCTF 20265,2951,18822.4%
18 TCP1P Server4,63288919.2%
19 Cyber Security Challenge Germany4,32162414.4%
20 VishwaCTF4,0452215.5%
21 HITCON CTF4,03193323.1%
22 ångstromCTF4,0123398.4%
23 UIUCTF 20263,79466717.6%
24 Real World CTF3,7543078.2%
25 Midnight Sun CTF3,73090124.2%
26 Hack United3,5342005.7%
27 nullcon HackIM 20263,5142457.0%
28 ASIS CTF3,50670520.1%
29 UTCTF 20263,44651915.1%
30 PatriotCTF 20263,40168020.0%
31 scriptCTF3,34960918.2%
32 HeroCTF3,26752716.1%
33 idekCTF3,23959518.4%
34 247CTF3,1932497.8%
35 NorthSec3,15565120.6%
36 b01lersCTF3,14856117.8%
37 UMassCTF 20263,10954917.7%
38 SunshineCTF3,0002909.7%
39 BuckeyeCTF 20252,96735512.0%
40 Kaspersky{CTF}2,82235312.5%
41 KalmarCTF2,75971926.1%
42 corCTF2,75634212.4%
43 Hacking-Lab2,7412057.5%
44 HSCTF2,6471967.4%
45 CrewCTF 20252,62652820.1%
46 Official HackMyVM2,6211646.3%
47 KnightCTF2,61326710.2%
48 TSG CTF2,56827910.9%
49 smileyCTF 20252,53033513.2%
50 GPN CTF 20262,47954321.9%
51 niteCTF '252,4752229.0%
52 XCTF 10th–SCTF 20262,4641455.9%
53 rCTF2,4251998.2%
54 Midnight Flag CTF - EXECUTION2,38460825.5%
55 DIVER OSINT CTF2,35750821.6%
56 R3CTF 20262,22634015.3%
57 HACKTORIA2,15227212.6%
58 UMDCTF 20262,13831514.7%
59 Hackuten2,1271999.4%
60 1753CTF2,12122810.7%
61 b01lers2,0691537.4%
62 CCDC2,00939019.4%
63 HackTheBox_KE2,000492.5%
64 JerseyCTF 🔒1,98922811.5%
65 CTF Tech1,96725212.8%
66 DEADFACE CTF1,96026813.7%
67 HackDay1,93931316.1%
68 Hack.lu CTF1,93430715.9%
69 SECCON CTF 141,92851726.8%
70 Dev Universe - FGTE CTF1,91922011.5%
71 BCACTF1,91524412.7%
72 CTF@CIT1,88822912.1%
73 eCitadel1,82923813.0%
74 jailCTF 20261,81927215.0%
75 Cyber Odyssey: Akasec CTF1,8041679.3%
76 zer0pts CTF1,78021412.0%
77 InCTF Nationals1,772854.8%
78 N0PSctf1,76220911.9%
79 NNS CTF1,74967038.3%
80 SECCON CTF 131,73330217.4%
81 IrisCTF1,71020512.0%
82 Equinor CTF1,67030318.1%
83 BlahajCTF1,60319512.2%
84 PSU CCSO1,599815.1%
85 HAXAGON Community1,55722914.7%
86 DamCTF1,54820313.1%
87 pwnable.tw1,51918011.8%
88 ZeroDays CTF1,47818212.3%
89 ECW CTF1,44628119.4%
90 TetCTF1,43514810.3%
91 TAMUctf 20261,43523016.0%
92 RITSEC CTF1,42421014.7%
93 Reply CTF Challenge1,397936.7%
94 CyberDawgs Club1,39117712.7%
95 xCTFs1,37528520.7%
96 SECCON CTF 20231,36720314.9%
97 Sieberrsec CTF1,31520915.9%
98 CyberSpace CTF 20241,31015611.9%
99 @Hack CTF - Concordia1,288957.4%
100 CakeCTF 20231,28115111.8%
101 hackerspace - DropCTF1,27919215.0%
102 ISITDTU-CTF1,2751229.6%
103 SWIMMER OSINT CTF1,24919415.5%
104 Hack In The North1,242231.9%
105 MontréHack1,24218514.9%
106 WaniCTF1,23216113.1%
107 AlpacaHack1,22423819.4%
108 wpictf1,188443.7%
109 OmniCTF | Public1,17618315.6%
110 DaVinciCTF1,15915012.9%
111 HKCERT CTF 20241,13518916.7%
112 Shutlock CTF 🕵1,13118716.5%
113 pingCTF 20261,12112511.2%
114 BDSec CTF1,11912811.4%
115 RingZer0 CTF1,11913612.2%
116 UnitedCTF1,10718716.9%
117 Swiss Hacking Challenge1,0901089.9%
118 RACTF1,071847.8%
119 Paradigm CTF1,06612812.0%
120 Olympics CTF1,06311410.7%
121 squ1rrel CTF 20261,05215514.7%
122 HackTheMidlands1,039797.6%
123 FAUST CTF 20261,03920019.2%
124 ZishanHack1,032353.4%
125 x3CTF 20261,03116215.7%
126 NCKUCTF1,03032131.2%
127 IRON CTF 20241,0171009.8%
128 Pragyan CTF'261,01210210.1%
129 PearlCTF1,000979.7%
130 SwampCTF961919.5%
131 Break the Syntax CTF958869.0%
132 Arab & Africa Regional CTF948495.2%
133 SpookyCTF939768.1%
134 BERKE1337925667.1%
135 Swinburne Cyber Security Club (SCSC)92410211.0%
136 offsec910556.0%
137 World Wide Hack9079210.1%
138 P3rf3ctr00t CTF906384.2%
139 BRICS+ CTF897819.0%
140 pwntools895819.1%
141 pwnable.kr8949510.6%
142 CyberSecurityRumble89212914.5%
143 Wargames.MY CTF 2024891637.1%
144 NewbieContest88713715.4%
145 Otaku hunters833759.0%
146 Wizer CTF813354.3%
147 Cryptocracy™795162.0%
148 EnigmaXplore 3.0794536.7%
149 RPISEC79216120.3%
150 snakeCTF78912916.3%