How to Compare Scans Over Time
Every scan is stored in history. Compare any two scans side by side to see what changed in DNS, SSL, security headers, SEO scores, or uptime.
How to Compare Scans Over Time
Every scan you run is permanently stored. You can go back to any historical scan and compare it against the current state or any other past scan. This lets you track changes, investigate incidents, and document improvements.
Accessing Scan History
- Open the domain detail page.
- Click the Scans tab (or History depending on your view).
- You will see a list of all past scans with:
- Date and time
- Scan type (Quick, Full, SEO, Port, etc.)
- Overall health score at time of scan
- Who triggered it (automated or manual)
Comparing Two Scans
- Select the scan you want to compare from the list.
- Click Compare or select a second scan to compare against.
- The comparison view shows both scans side by side.
Changed values are highlighted:
- Green — improved since the earlier scan
- Red — degraded since the earlier scan
- Yellow — changed but not clearly better or worse (e.g., DNS record value changed)
What Can Be Compared
| Data Type | What You See |
|---|---|
| DNS records | Records added, removed, or changed |
| SSL certificate | New issuer, expiry date change, SANs diff |
| WHOIS | Expiry date, registrar, nameserver changes |
| Security headers | Headers added or removed |
| Health score | Score timeline chart |
| SEO score | Score change and sub-dimension breakdown |
| Open ports | Ports added or closed |
| Subdomains | New subdomains discovered or removed |
| Tech stack | Technologies added or removed |
Use Cases
Post-Migration Verification
After moving a website to a new server or CDN, compare the scan from before the migration to the one after. Verify DNS points to the right IP, SSL is valid on the new host, and no security headers were lost.
Incident Investigation
When something breaks, compare the most recent scan to the last known-good scan to identify exactly what changed and when it changed.
Progress Tracking
After fixing SEO issues or adding security headers, compare scans to document the improvements — useful for client reporting.
Change Detection Audit
For domains you do not control (competitors, clients), scan history lets you build a timeline of every change that has occurred.