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SSLyze vs GF.dev TLS Cipher Suite Scanner: catalog facts
SSLyze	GF.dev TLS Cipher Suite Scanner
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	Quick check of the negotiated TLS version and cipher suite Nothing to install
No graphical interface Output assumes some knowledge of TLS	Reports the negotiated suite rather than a full list of supported ciphers Only checks servers reachable from the internet
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.