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Dc402 alternatives & similar sites

DC402: Omaha DEF CON Group — 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
defcon.org ↗	130 match 24 shared linkers · same topic	DEF CON® Hacking Conference Home	en	information-and-network-security	robotsllmsaihumans	emailphone	none
eff.org ↗	63 match 24 shared linkers · same topic	Electronic Frontier Foundation \| Defending your rights in the digital world	en	information-and-network-security Drupal	robotsllmsaihumans	emailphone	none
ic3.gov ↗	100 match 24 shared linkers · same topic	Home Page - Internet Crime Complaint Center (IC3)	en	information-and-network-security	robotsllmsaihumans	emailphone	none
thriftbooks.com ↗	76 match 24 shared linkers	New & Used Books \| Buy Cheap Books Online at ThriftBooks	en	shopping	robotsllmsaihumans	emailphone	none
libreoffice.org ↗	76 match 24 shared linkers · same topic	LibreOffice	en	software-and-applications	robotsllmsaihumans	emailphone	none
keybase.io ↗	51 match 24 shared linkers · same topic	Keybase	en	information-and-network-security	robotsllmsaihumans	emailphone	none
ubuntu.com ↗	46 match 24 shared linkers · same topic	Enterprise Open Source and Linux \| Ubuntu	en	operating-systems	robotsllmsaihumans	emailphone	none
usa.gov ↗	37 match 24 shared linkers	Making government services easier to find \| USAGov	en	government-support-and-welfare Drupal	robotsllmsaihumans	emailphone	none
nbcnews.com ↗	30 match 24 shared linkers	NBC News - Breaking Headlines and Video Reports on World, U.S. and Local Angles \| NBC News	en	politics	robotsllmsaihumans	emailphone	none
html5up.net ↗	22 match 24 shared linkers · same topic	HTML5 UP! Responsive HTML5 and CSS3 Site Templates	en	web-design-and-html	robotsllmsaihumans	emailphone	none
comodo.com ↗	65 match shared topic	Advanced Website Protection for Unmatched Cyber Defense	en	information-and-network-security WordPress WooCommerce	robotsllmsaihumans	email phone	none
proton.me ↗	65 match shared topic	Proton: Privacy by default	en	information-and-network-security	robotsllmsaihumans	emailphone	none
netcraft.com ↗	65 match shared topic	Next-Gen Digital Risk Protection \| AI-powered Cybercrime Defense by Netcraft	en	information-and-network-security	robotsllmsaihumans	emailphone	none
netplus-group.com ↗	65 match shared topic	NetPlus Group	en	information-and-network-security WordPress WooCommerce	robotsllmsaihumans	emailphone	none
deflect.ca ↗	65 match shared topic	Deflect - Get Protected, Stay Connected	Canada en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
pr.tn ↗	65 match shared topic	Proton: Privacy by default	en	information-and-network-security	robotsllmsaihumans	emailphone	none
openrightsgroup.org ↗	65 match shared topic	Home \| Open Rights Group	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
talosintelligence.com ↗	65 match shared topic	Cisco Talos Intelligence Group - Comprehensive Threat Intelligence	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.