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Ctfd alternatives & similar sites

CTFd : The Easiest Capture The Flag Platform — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Information And Network Security →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
kenai.app ↗	66 match 1 shared topics	Kenai Platform	en	information-and-network-security	robotsllmsaihumans	emailphone	none
restpointsystems.com ↗	66 match 1 shared topics	Restpoint Systems \| Secure Infrastructure Platforms	en	information-and-network-security	robotsllmsaihumans	emailphone	none
4quays.com ↗	66 match 1 shared topics	4Quays - the Crypto Agility Platform	en	information-and-network-security	robotsllmsaihumans	emailphone	none
darktrace.com ↗	66 match 1 shared topics	Darktrace \| The Essential AI Cybersecurity Platform	en	information-and-network-security	robots llmsaihumans	emailphone	none
bbravemonitoring.cloud ↗	66 match 1 shared topics	B-Brave Monitoring Platform	en	information-and-network-security	robotsllmsaihumans	emailphone	partial · 8
basevpn.net ↗	66 match 1 shared topics	BaseVPN - Privacy-first VPN platform	en	information-and-network-security	robotsllmsaihumans	emailphone	partial · 8
cyex.io ↗	66 match 1 shared topics	cyex \| Cyber Security Awareness Platform	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
cybrdfens.com ↗	65 match 1 shared topics	Security Assessment Platform	en	information-and-network-security	robotsllmsaihumans	emailphone	none
debugr.app ↗	65 match 1 shared topics	Debugr \| Professional Bug Bounty Platform	en	information-and-network-security	robotsllmsaihumans	emailphone	none
visiogram.ai ↗	65 match 1 shared topics	Visiogram Sovereign \| Regulated Architecture Evidence Platform	en	information-and-network-security	robotsllmsaihumans	emailphone	none
herdprotect.com ↗	65 match 1 shared topics	herdProtect - Anti-Malware Multiscanning Platform in the Cloud	en	information-and-network-security	robotsllmsaihumans	emailphone	none
hoxhuntltd.com ↗	65 match 1 shared topics	The Hoxhunt Human Risk Management Platform	en	information-and-network-security Webflow	robotsllmsaihumans	emailphone	none
hoxhuntinsights.com ↗	65 match 1 shared topics	The Hoxhunt Human Risk Management Platform	en	information-and-network-security Webflow	robotsllmsaihumans	emailphone	none
hoxhuntexperts.com ↗	65 match 1 shared topics	The Hoxhunt Human Risk Management Platform	en	information-and-network-security Webflow	robotsllmsaihumans	emailphone	partial · 8
csintlarp.org ↗	65 match 1 shared topics	Sujrb \| OSINT Intelligence Platform	en	information-and-network-security	robotsllmsaihumans	emailphone	none
ctx.io ↗	65 match 1 shared topics	CTX \| Cyber Threat Intelligence Platform	en	information-and-network-security	robotsllmsaihumans	emailphone	none
authwire.ch ↗	65 match 1 shared topics	AuthWire - Identity Operations Platform	Switzerland en	information-and-network-security	robotsllmsaihumans	email phone	none
anonano.ai ↗	65 match 1 shared topics	Anonano - Securing the Future Through Innovation	en	information-and-network-security	robotsllmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.