Testing TLS/SSL encryption anywhere on any port
Checks a server's TLS setup from your own machine, including internal hosts, with no letter grade.
alternatives to
Qualys SSL Labs
Hosted service that tests a public server's TLS configuration and grades it. A closed product from Qualys.
testssl.sh and SSLyze. 2 alternatives to Qualys SSL Labs, in Shell, Python. Compare fit, licence, stars and the latest signed release.
Side by side
| Tool | Fit | Stars | Licence | Terms | Self-hosted | Language | Latest | Last push |
|---|---|---|---|---|---|---|---|---|
| testssl.sh | Partial | 9.2k | GPL-2.0 | Open source | Yes | Shell | v3.2.4 | 2026-10-18 |
| SSLyze | Partial | 3.8k | AGPL-3.0 | Open source | Yes | Python | 6.3.1 | 2026-10-18 |
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2 alternatives
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About Qualys SSL Labs
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