SiteGuardian
EU-hosted continuous security, compliance & monitoring platform
Scope: TLS + DNS + email + headers + accessibility + cookies + compliance
Security Headers (Scott Helme)
HTTP response header audit
Pricing: Free. Paid Report URI integration for CSP reporting.
Visit their site →Feature-by-feature
Each row verified against the competitor's public documentation.
| Capability | Security Headers (Scott Helme) | SiteGuardian |
|---|---|---|
| HTTP response header grading | Yes | Yes |
| Subresource Integrity (SRI) audit | Yes | Yes |
| Mixed-content detection | Yes | Yes |
|
CSP reporting configured (report-uri / report-to)
securityheaders.com detects whether any CSP reporting endpoint is configured. SiteGuardian additionally provides the ingest endpoint itself — aggregation, alerting, and GDPR-compliant anonymisation — in every plan. |
Yes | Yes |
| TLS / certificate analysis | No | Yes |
| TLS 1.3 0-RTT (early_data) detection | No | Yes |
| DNS / CAA / DNSSEC | No | Yes |
| Nameserver redundancy (RFC 2182) | No | Yes |
| Email authentication (SPF/DKIM/DMARC) | No | Yes |
| Accessibility (WCAG 2.2 / EAA) | No | Yes |
| Cookie / GDPR consent scanner | No | Yes |
| Continuous monitoring | No | Yes |
| Public API | Yes | Yes |
| Compliance mapping (NIS2, GDPR, DORA) | No | Yes |
When Security Headers (Scott Helme) is the better choice
We'd rather be honest than waste your time.
Fast public scoring of HTTP response headers with a shareable grade badge.
- You only care about the HTTP header grade (A+, A, B…).
- You already use Report URI for CSP violation reporting.
- You don't need TLS depth, DNS, email or compliance output.
When SiteGuardian is the better choice
- You want continuous monitoring and alerts, not one-off scans.
- You need EU data residency and GDPR-by-design processing.
- You need TLS + DNS + email + headers + accessibility + cookies in one report.
- You need findings mapped to NIS2, GDPR, DORA, DSA, EAA, CRA articles.
- You want to benchmark your score against 700k EU sites.
Run the same scan on your domain — free, 60 seconds
See how your site scores across six dimensions. No registration required.
Scan my websiteThis comparison is based on publicly available documentation. Product names and trademarks belong to their respective owners. If you spot an inaccuracy, please let us know via contact.