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SSLyze vs CryptCheck: catalog facts
SSLyze	CryptCheck
Free Free and open source.	Free Free to use in the browser.
Command line	Web
Fast TLS configuration scanning from the command line JSON output suited to automation	Checks HTTPS, SMTP and XMPP servers Detailed protocol and cipher information
No graphical interface Output assumes some knowledge of TLS	Interface is in French Little documentation on the home page
Downloadable app	Web application
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	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.