testssl.sh vs DigiCert SSL Installation Checker: catalog facts
 testssl.sh |  DigiCert SSL Installation Checker |
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Free Free and open source. |
Free Free to use; DigiCert sells certificates. |
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macOS, Linux, Command line |
Web |
- Tests any port, not only HTTPS on 443
- Checks protocols, ciphers and known cryptographic flaws
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- Diagnoses installation and chain problems
- Related CSR and S/MIME tools on the same site
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- Command-line output takes some TLS knowledge to interpret
- Intended for authorized testing of servers you run or may test
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- Focused on installation rather than a full protocol audit
- Surrounded by a certificate vendor's sales pages
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Downloadable app |
Web application |
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Open source |
Closed source |
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License: GPL-2.0 |
License not stated |
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No account needed |
Not stated if an account is needed |
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Needs internet |
Needs internet |
Checked September 23, 2026 | Checked September 23, 2026 |
Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.
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