Comparison
ZeriFlow vs Mozilla Observatory
Mozilla Observatory scores websites out of 100 based on HTTP security headers and CSP — and it does that reliably. ZeriFlow extends the surface area to TLS configuration, DNS security, email authentication, cookie hygiene, and source code analysis. Both tools are valuable; they cover different ground.
Feature Comparison
| Feature | ZeriFlow | Mozilla Observatory |
|---|---|---|
| Checks | 80+ across 12 categories | 100-point header scan |
| CSP / CORS | CSP + full header suite | Strong CSP and CORS focus |
| TLS analysis | Full (10 checks) | Not included |
| DNS / Email | SPF / DKIM / DMARC | Not included |
| Cookie security | 6 checks | Not included |
| Source code scan | GitHub + ZIP analysis | Not available |
| PDF export | Available on Pro+ | Not available |
| Scoring | /100 + letter grade | /100 letter grade |
| History & tracking | Dashboard | No account needed |
| Free tier | 3 scans / day | Free, no account |
| Pricing | From €9.99 / mo | Free |
When to Use Each Tool
Use Observatory when...
- You need a trusted, authoritative header and CSP score
- You want a free tool with no account required
- Your primary concern is Content-Security-Policy tuning
- HTTP header compliance is sufficient for your audit scope
Use ZeriFlow when...
- You need TLS certificate and cipher suite validation
- You want DNS security and email authentication (SPF, DKIM, DMARC) covered
- You need cookie security checks beyond headers
- You manage multiple sites and want scan history in a dashboard
- You need PDF export for compliance reporting
- You want source code analysis alongside external scanning