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Sites similar to ctf101.org

Ctf101 alternatives & similar sites

CTF Handbook — 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
ethicalhackinghandbook.com ↗	66 match 1 shared topics	Ethical Hacking Handbook \| Ethical Hacking Handbook	en	information-and-network-security	robotsllmsaihumans	emailphone	none
ctfd.io ↗	63 match 1 shared topics	CTFd : The Easiest Capture The Flag Platform	en	information-and-network-security	robotsllmsaihumans	emailphone	none
defconkids.net ↗	63 match 1 shared topics	DEF CON® Hacking Conference Home	en	information-and-network-security	robotsllmsaihumans	emailphone	none
defcon.org ↗	63 match 1 shared topics	DEF CON® Hacking Conference Home	en	information-and-network-security	robotsllmsaihumans	emailphone	full · 20
defcon.net ↗	63 match 1 shared topics	DEF CON® Hacking Conference Home	en	information-and-network-security	robotsllmsaihumans	emailphone	full · 20
0day.net ↗	63 match 1 shared topics	DEF CON® Hacking Conference Home	en	information-and-network-security	robotsllmsaihumans	emailphone	full · 20
anishchand.com ↗	63 match 1 shared topics	Anish Chand	en	information-and-network-security	robotsllmsaihumans	emailphone	none
any.run ↗	63 match 1 shared topics	ANY.RUN - Interactive Online Malware Sandbox	en	information-and-network-security	robotsllmsaihumans	emailphone	none
anuragkhandelwal.com ↗	63 match 1 shared topics	Anurag Khandelwal	en	information-and-network-security	robotsllmsaihumans	emailphone	none
bsd-group.com ↗	63 match 1 shared topics	Home old - BSD GROUP	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
cwsandbox.org ↗	62 match 1 shared topics	The Sandbox \| Understanding CyberForensics	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
dataprotectcanada.com ↗	62 match 1 shared topics	Data Protect Canada	en	information-and-network-security PrestaShop WooCommerce	robotsllmsaihumans	emailphone	none
mcpjail.com ↗	62 match 1 shared topics	MCP Jail - Secure MCP Server Sandbox	en	information-and-network-security	robotsllmsaihumans	emailphone	none
cvpnt.com ↗	62 match 1 shared topics	cVPNt — Compare VPN Tech & Find Your Perfect Privacy Solution	en	information-and-network-security	robotsllmsaihumans	emailphone	none
dataimagegroup.com ↗	62 match 1 shared topics	Data Image Group / DSS Home Page	en	information-and-network-security	robotsllmsaihumans	emailphone	none
actiance.com ↗	62 match 1 shared topics	Smarsh: Digital Communications Governance and Archiving	United States~ en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
ericb.info ↗	62 match 1 shared topics	EricB.ca	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
resonanex.com ↗	62 match 1 shared topics	Resonanex \| Hands-On Cybersecurity Research Labs	en	information-and-network-security	robotsllmsaihumans	emailphone	partial · 8

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.