r/securityCTF
ActiveSecurityCTF : CTF announcements & writeups
A community for security^CTF announcements and writeups. * [SecurityCTF posts as tweets](https://twitter.com/SecurityCTF) * [WTF is CTF ?](https://ctftime.org/ctf-wtf/) * [CTF Field Guide](https://trailofbits.github.io/ctf/) * [CTF calendar](http://captf.com/calendar/) * [CTFtime](http://ctftime.org/) **Join us on IRC (freenode):** * [#r_securityCTF](http://webchat.freenode.net/?randomnick=0&channels=#r_securityCTF) **Looking for a team ?** * Join [OpenToAll CTF team](http://wi.reddit.com/r/OpenToAllCTFteam/) **CTF Streamers:** * [LiveOverflow](https://youtube.com/LiveOverflowCTF) * [Murmus](https://www.youtube.com/murmusCTF) **CTF teams:** * [Plaid Parliament of Pwning](http://pwning.net/) * [DragonSector](http://dragonsector.pl/) * [penthackon](http://penthackon.wechall.net/) * [eindbazen](http://eindbazen.net) * [Leet More](http://leetmore.ctf.su/) * [smokedchicken](http://smokedchicken.org/) * [Disekt](http://disekt.org/) * [KnightSec](http://hackucf.org/) * [0ops](http://www.0ops.net/) * [StratumAuhuur](https://stratum0.org/blog/categories/writeup/) **Related Subreddits:** * [Reverse Engineering](http://reddit.com/r/ReverseEngineering) * [Crypto](http://www.reddit.com/r/crypto) * [NetSec](http://www.reddit.com/r/netsec) * [LowLevel](http://www.reddit.com/r/lowlevel) * [VRD](http://www.reddit.com/r/vrd) **Tools:** * [pwntools](https://pwntools.com/)
Members
49,215
as of February 2025
Last post
today
November 1, 2026
Posts (30 days)
100+
Created
2012
May 2, 2012
Total posts
8.0K
archived
Total comments
20.7K
archived
Is r/securityCTF dead? Active community.
r/securityCTF is posting regularly — the latest post was today. Active subreddits can't be requested through r/redditrequest.
Find abandoned subreddits in this niche you can claim →r/securityCTF activity over the last year
New posts per month.
Frequently asked questions about r/securityCTF
How many members does r/securityCTF have?
r/securityCTF had 49,215 members as of February 2025, the most recent archive crawl of its subscriber count.
Is r/securityCTF dead?
No. r/securityCTF is active — the most recent post was today, with 100+ posts in the last 30 days.
When was r/securityCTF created?
r/securityCTF was created on May 2, 2012.
Can I take over r/securityCTF?
Probably not. r/securityCTF is still in active use, and Reddit only hands over communities whose human moderators have all gone inactive on Reddit for 60+ days. If you want a community in this niche, look for abandoned subreddits on the same topic instead — DeadSubs finds them automatically.
Want your own subreddit with a built-in audience?
Thousands of subreddits like r/securityCTF have been abandoned by their moderators. DeadSubs finds the ones you can claim.
Activity checked November 1, 2026from the Arctic Shift Reddit archive. Member counts come from the archive's most recent crawl and may lag Reddit. DeadSubs is not affiliated with Reddit Inc.