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ssllabs-scan vs testssl.sh: catalog facts
ssllabs-scan	testssl.sh
Free The command-line client is open source under Apache-2.0; SSL Labs API use is free with…	Free Free and open source.
Command line	macOS, Linux, Command line
Supports scheduled and bulk server assessments Uses the SSL Labs reference API client	Tests any port, not only HTTPS on 443 Checks protocols, ciphers and known cryptographic flaws
Requires access to the SSL Labs API API use is subject to restrictions	Command-line output takes some TLS knowledge to interpret Intended for authorized testing of servers you run or may test
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-2.0
Account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 23, 2026

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