SSL Labs Alternative: Quick SSL and TLS Checks Compared

Qualys SSL Labs' SSL Server Test is the reference most people mean when they say "check my SSL". It is thorough, free and widely trusted. It is also built for a full configuration audit, which is more than you need when you only want to know whether a certificate is about to expire or why a browser shows a warning. This page compares it with the SSL and TLS tools on SiteDownCheck so you can choose the right level of depth.

SSL Labs details come from its test page and its public rating guide, read in October 2026. The guide itself notes that parts of its methodology are outdated, so treat grade rules as a description of the approach rather than an exact current formula. Our details come from how our tools work.

What SSL Labs does best

The SSL Server Test is operated by Qualys SSL Labs and describes itself as a comprehensive free SSL test for public web servers. It performs a deep analysis of server configuration, covering the certificate, protocol support, key exchange and cipher strength, and it returns a letter grade.

Its rating guide explains the structure. A certificate problem such as a name mismatch, an expired or untrusted certificate, a self-signed certificate or an insecure signature drives the score down hard. Otherwise the score is built from three categories: protocol support (30 percent), key exchange (30 percent) and cipher strength (40 percent). Grades run from A to F, with caps for known vulnerabilities and weak configurations, and an A+ for a strong setup with HSTS of at least six months. Missing TLS 1.3 or a weak HSTS setup can hold you at A-, according to the guide.

The test page also offers a "do not show the results on the boards" option if you do not want your result listed publicly. It states that it does not use submitted domain names or results for other purposes.

If you are preparing for a compliance review, tuning cipher suites, or want the most detailed second opinion on a public server, SSL Labs is the right tool. Scans take a while because the test is exhaustive.

What SiteDownCheck does

We split the job into smaller, faster checks.

• The SSL certificate checker connects to the host and reports certificate validity, issuer, subject, valid-from and valid-to dates, days remaining, the names the certificate covers (SANs), whether the hostname matches, the negotiated TLS version and cipher, the chain it received and any trust error. It flags an expired certificate, one expiring within 14 days, a hostname mismatch and an outdated negotiated TLS version.
• The TLS version checker tests TLS 1.0, 1.1, 1.2 and 1.3 with separate connections and reports which the server accepts, with a simple grade and fix tips. If our server cannot speak a legacy version, that version is marked untested rather than guessed, and the grade covers only what was tested.
• The SSL chain debugger helps when the certificate works in browsers but fails in apps, which is usually a missing intermediate.
• The HSTS checker और bulk SSL checker cover HSTS headers and many hostnames at once.
• Free uptime monitors alert you about SSL expiry at several points before the date, so you do not have to remember to rerun a test.

Side-by-side

When to use which

Use SSL Labs when you need an authoritative, detailed grade: after a server migration, before a security review, or when you want to justify changes to cipher suites, key sizes or protocol support to a team or auditor.

Use our SSL checker when a customer says "your site is not secure". It answers the common questions fast: is the certificate expired, does it match the hostname, is the chain complete, who issued it. SSL and TLS certificate errors explained maps each message to a cause.

Use the TLS version checker when you only need to confirm that TLS 1.0 and 1.1 are off and TLS 1.2 and 1.3 are on, for example after a hosting change or a vendor questionnaire.

Use monitors when the real risk is forgetting to renew. A one-off test cannot warn you in 30 days; an alert can. See how to renew an SSL certificate and automate it.

A combined workflow

1. Run the SSL checker. If the certificate is expired, mismatched or untrusted, fix that first, because it dominates every other result.
2. If it works in browsers but fails in curl or an app, run the SSL chain debugger and install the full chain.
3. Run the TLS version checker to confirm legacy protocols are off.
4. Check the HSTS checker and read the HSTS preload guide before adding preload.
5. Run SSL Labs for the full audit and keep the report with your change record.
6. Add a monitor so expiry and certificate changes alert you in future.

Honest limits of ours

We do not produce an SSL Labs-style graded audit. We do not enumerate every cipher suite, simulate handshakes for different client types or test for named vulnerabilities. Our TLS grade is a simpler score based on which protocol versions are accepted and the negotiated ciphers. Our tests run from our own servers, so a CDN or firewall that treats us differently from your visitors can affect results. For anything compliance-related, use a full audit tool and your own scanner.

अगले कदम

• Check a certificate with the SSL checker.
• Test protocol support with the TLS version checker.
• Set up automatic renewal using the Let's Encrypt renewal failures guide.
• Review SSL certificate types.
• Start a free uptime monitor with SSL expiry alerts.

सामान्य प्रश्न

Is SSL Labs better than SiteDownCheck for SSL?

For depth, yes: it is a full audit. For a fast answer about expiry, name match or chain, our checkers are quicker, and our monitors can alert before expiry.

Does an SSL Labs grade of A+ mean my site is secure?

It means the HTTPS configuration scored well. It says nothing about application vulnerabilities, so treat it as one piece of your security posture.

Why would a site show a certificate error in some apps but not browsers?

Often an intermediate certificate is missing. Browsers can fetch it, while many apps cannot. Serve the full chain.

Can I use both?

Yes. Use ours for quick checks and alerts, and SSL Labs for periodic deep audits.

Opinions here are our own; verify vendor details yourself. See our संपादकीय नीति और अस्वीकरण.