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testssl.sh vs Hardenize: catalog facts
testssl.sh	Hardenize
Free Free and open source.	Freemium The public report is free; continuous monitoring is a paid service.
macOS, Linux, Command line	Web
Tests any port, not only HTTPS on 443 Checks protocols, ciphers and known cryptographic flaws	Free public configuration report for any domain Continuous certificate and perimeter monitoring for organisations
Command-line output takes some TLS knowledge to interpret Intended for authorized testing of servers you run or may test	Monitoring features are aimed at organisations rather than individuals Little public detail about pricing
Downloadable app	Web application, Hosted service
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.