Compare software

sslscan vs CryptCheck: catalog facts
sslscan	CryptCheck
Free Free and open source under the GPL-3.0 license.	Free Free to use in the browser.
Windows, Linux, Command line	Web
Quick report of supported protocols and cipher suites Rewritten scanning backend in version 2	Checks HTTPS, SMTP and XMPP servers Detailed protocol and cipher information
Command line only, with no graphical interface No packaged releases on the GitHub page	Interface is in French Little documentation on the home page
Downloadable app	Web application
Open source	Closed source
License: GPL-3.0	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 October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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