Nivaronix vs Mozilla HTTP Observatory
Mozilla's HTTP Observatory is a free, open-source scanner focused on HTTP response headers and TLS configuration, run as a single on-demand scan. It's a well-regarded tool for exactly what it covers. Nivaronix covers headers too, plus DNS/DNSSEC/CAA and SPF/DMARC email authentication, and adds continuous monitoring with alerts rather than a one-time score.
Last verified 2026-08-11. Tool capabilities change — check Mozilla HTTP Observatory's own site for its current feature set.
| Capability | Nivaronix | Mozilla HTTP Observatory |
|---|---|---|
| HTTP security headers (HSTS, CSP, X-Frame-Options, etc.) | Covered. Checks all six headers plus the deprecated X-XSS-Protection header. | Covered. This is the Observatory's core check, with a letter-grade score. |
| SSL/TLS certificate and protocol version | Covered. Expiry, hostname match, chain completeness, weak TLS version, trust chain. | Partially covered. The Observatory's TLS section defers to a live SSL Labs query rather than running its own certificate checks. |
| DNS / DNSSEC / CAA records | Covered. DNS resolution health, DNSSEC signing status, CAA issuer restrictions. | Not covered. Not part of what this tool checks — it's scoped to HTTP and TLS. |
| SPF / DMARC email authentication | Covered. SPF policy strength, DMARC enforcement level, lookup-limit warnings. | Not covered. Not part of what this tool checks — no email-authentication scope. |
| Cookie attributes (Secure, HttpOnly, SameSite) | Covered. Flags each missing attribute per cookie the site sets. | Partially covered. Cookie flags are folded into the header score rather than reported per-cookie. |
| HTTP → HTTPS redirect chain | Covered. Checks the redirect actually lands on HTTPS, not just that HSTS is set. | Not covered. Not directly checked as a separate item. |
| Continuous monitoring with alerts | Covered. Scheduled rescans with alerts on expiring certificates or new findings (paid plans). | Not covered. A one-time, on-demand scan — no scheduling or alerting. |
| Free to use | Covered. Free single scan, no signup. Paid plans add monitoring and more assets. | Covered. Fully free and open source. |
When Mozilla HTTP Observatory fits
You want a quick, no-signup header and TLS score for a single check, and you don't need DNS, email-authentication, or ongoing monitoring — Mozilla's Observatory does that well and it's genuinely free with no upsell.
When Nivaronix fits
You want the same header/TLS coverage plus DNS, DNSSEC, CAA, SPF and DMARC in one report, and you want to know automatically when a certificate is about to expire or a finding changes, rather than remembering to re-run a scan.