There are a lot of Capture The Flag (CTF) competitions in our days, some of them have excelent tasks, but in most cases they're forgotten just after the CTF finished. We decided to make some kind of CTF archive and of course, it'll be too boring to have just an archive, so we made a place, where you can get some another CTF-related info - current overall Capture The Flag team rating, per-team statistics etc

CTF organizers, we need your cooperation!

rc4t4b4rn4k – June 5, 2012, 12:41 a.m.

Awesome idea :)

rajeshsikchi – Oct. 1, 2013, 8:46 a.m.

Cool idea :)

Asiral – Feb. 24, 2014, 7:28 a.m.

keep going guys :)

s2ItKings2 – Sept. 11, 2014, 2:31 a.m.

What is the competitions for Hacker?

nilch – Oct. 18, 2014, 6:42 a.m.


rubiya805 – April 26, 2015, 7:49 a.m.


Chinalover – May 15, 2015, 1:44 p.m.

what's the application of the website?

rootfreak – May 26, 2015, 4:55 p.m.

I love challenges!

Devilhunter_Dante – Aug. 30, 2015, 5:54 p.m.

Writeup should be Categorised Based on their Platform or type of Challenge ,
Like "web" / "reversing" / "Crypto" etc .
It would be awesome and Convinient ,if the Tags are highlighted and can me clicked , to get desired type of write to be arranged orderly. Thank you if these is put into Consideration .

tranhiep – Aug. 10, 2016, 6:46 a.m.


anarh1st47 – Sept. 12, 2016, 7:49 p.m.


mau5 – Sept. 24, 2016, 6:15 a.m.


stang – Nov. 3, 2016, 12:21 a.m.

hi! I tried submitting a upcoming CTF in Sydney, Australia but think your site is broken and didn't allow me to submit. Here's the info:

Inaugural Australiasian Security Cup
StartCon is hosting the Inaugural Australiasian Security Cup, a 1 day competition for rising hackers to test their cybersecurity skills!

This is an unparalleled opportunity to build your profile as a security engineer - leaders from the industry will act as mentors and judges, as well as scouting for their next star hires.

Apply now! (Deadline Mon Nov 7th)

lascala.luke – Dec. 1, 2016, 3:19 a.m.

Hey we have a crowd-sourced always online ctf platform running at

aspyatkin – Jan. 17, 2017, 3:20 a.m.

Hello, CTFTime, how could our team reach you out to change the time of the event we registered? You seem not to react either via email or feedback page... It's pretty annoying.

Patiljayesh@5525 – Feb. 18, 2017, 6:29 a.m.

How to participate in competetions..I m New. need Help n guidance...

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