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Privacy-First Captcha and Bot Protection | ALTCHA — 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
altcha.org ↗	85 match shared topic	Privacy-First Captcha and Bot Protection \| ALTCHA	en	information-and-network-security	robotsllmsaihumans	emailphone	none
ddosnull.com ↗	67 match shared topic	ddosNull Shield \| DDoS & Bot Protection for WordPress	Canada~ en	information-and-network-security WooCommerce	robotsllmsaihumans	email phone	none
iitr.us ↗	67 match shared topic	IITR: Privacy Products, External Data Protection Officer	United States en	information-and-network-security Joomla	robots llmsaihumans	email phone	none
ironwall.com ↗	67 match shared topic	Online Privacy Protection	en	information-and-network-security	robotsllmsaihumans	emailphone	none
europrivacy.com ↗	67 match shared topic	Europrivacy GDPR Certification of Personal Data Protection and Privacy Conformity	en	information-and-network-security Drupal	robotsllmsaihumans	emailphone	none
contentremoval.com ↗	67 match shared topic	Online Content Removal & Privacy Protection \| ContentRemoval.com	en	information-and-network-security	robotsllmsaihumans	emailphone	partial · 8
dmca.com ↗	61 match shared topic	Content Protection and Takedown Company Since 2006 \| DMCA.com	en	information-and-network-security	robotsllmsaihumans	emailphone	none
trustarc.com ↗	61 match shared topic	Data Privacy Management Software & Solutions \| TrustArc	United States~ en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
comodo.com ↗	61 match shared topic	Advanced Website Protection for Unmatched Cyber Defense	en	information-and-network-security WordPress WooCommerce	robotsllmsaihumans	email phone	none
sitelock.com ↗	61 match shared topic	Website Security Monitoring & Malware Protection \| SiteLock	en	information-and-network-security	robotsllmsaihumans	emailphone	none
proton.me ↗	61 match shared topic	Proton: Privacy by default	en	information-and-network-security	robotsllmsaihumans	emailphone	none
truste.com ↗	61 match shared topic	Data Privacy Management Software & Solutions \| TrustArc	United States~ en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
acronis.com ↗	61 match shared topic	AI-Powered Cybersecurity, Data Protection & IT Automation \| Acronis	en	information-and-network-security	robots llmsaihumans	emailphone	partial · 8
usercentrics.com ↗	61 match shared topic	Usercentrics \| Leading in Data Privacy & Compliance	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
paloaltonetworks.com ↗	61 match shared topic	Leader in Cybersecurity Protection & Software for the Modern Enterprises - Palo Alto Networks	en	information-and-network-security Adobe Experience Manager	robotsllmsaihumans	emailphone	none
iptwins.com ↗	61 match shared topic	IP Twins: domain names, brand protection & cybersecurity	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
sucuri.net ↗	61 match shared topic	Sucuri - Complete Website Security, Protection & Monitoring	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
gnupg.org ↗	61 match shared topic	The GNU Privacy Guard	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.