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Testssl alternatives & similar sites

/bin/bash based TLS/SSL tester: testssl.sh — 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
rapidssl.com ↗	65 match shared topic	Upgrade your TLS/SSL & Wildcard Certificates to GeoTrust \| RapidSSL	en	information-and-network-security Adobe Experience Manager	robotsllmsaihumans	emailphone	none
sectigostore.com ↗	65 match shared topic	Buy Sectigo SSL/TLS Certificates - Save 81% \| Formerly Comodo CA	en	information-and-network-security	robotsllmsaihumans	emailphone	none
positivessl.com ↗	60 match shared topic	PositiveSSL® - The Official PositiveSSL® Site \| PositiveSSL Certificates	en	information-and-network-security	robotsllmsaihumans	emailphone	none
ssllabs.com ↗	60 match shared topic	Qualys SSL Labs	en	information-and-network-security	robotsllmsaihumans	emailphone	none
webnamescorporate.com ↗	60 match shared topic	Webnames Corporate \| Domain Management, Brand Security, DNS & SSL	en	information-and-network-security WordPress	robots llmsaihumans	email phone	none
sectigo.com ↗	60 match shared topic	Certificate Management Solutions & SSL Certificates \| Sectigo® Official	en	information-and-network-security	robotsllmsaihumans	emailphone	none
thawte.com ↗	60 match shared topic	Smart Global SSL Security \| Thawte	en	information-and-network-security Adobe Experience Manager	robotsllmsaihumans	emailphone	none
openssl.org ↗	60 match shared topic	OpenSSL	en	information-and-network-security	robotsllmsaihumans	emailphone	none
ssl.com ↗	60 match shared topic	SSL Certificate & Digital Certificate Authority - SSL.com	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
gogetssl.com ↗	60 match shared topic	Cheap SSL Certificates as low as $14.21 per year \| GoGetSSL®	en	information-and-network-security	robotsllmsaihumans	emailphone	none
privatebin.info ↗	60 match shared topic	PrivateBin	en	information-and-network-security	robotsllmsaihumans	emailphone	none
exploit-db.com ↗	60 match shared topic	Exploit Database - Exploits for Penetration Testers, Researchers, and Ethical Hackers	en	information-and-network-security	robotsllmsaihumans	emailphone	none
trustlogo.com ↗	60 match shared topic	Sectigo Secure Site Seal \| Install Trusted SSL Site Seal	en	information-and-network-security	robotsllmsaihumans	emailphone	none
comodoca.com ↗	60 match shared topic	Certificate Management Solutions & SSL Certificates \| Sectigo® Official	en	information-and-network-security	robotsllmsaihumans	emailphone	none
pavion.com ↗	60 match shared topic	Ltorres@ctsi-usa.com, Author At Pavion	en	information-and-network-security WordPress	robots llmsaihumans	email phone	none
sslchecker.dev ↗	60 match shared topic	SSL Checker AI Agent	en	information-and-network-security	robots llmsaihumans	emailphone	none
ssltrust.com.au ↗	60 match shared topic	SSL Certificates \| No. 1 Provider with Australian Support	Australia en	information-and-network-security	robotsllmsaihumans	email phone	none
zerossl.com ↗	60 match shared topic	Free SSL Certificates and SSL Tools - ZeroSSL	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.