SecurityHeaders.com Alternatives
SecurityHeaders.com by Scott Helme since 2014 — quick A-F grade for security headers (CSP, HSTS, X-Frame-Options, Referrer-Policy, Permissions-Policy). Limitation: does not analyze TLS, cookies, CORS, CAA, DNSSEC — headers only. Full-spectrum alternatives: Enterno.io Security Scanner (+ TLS, cookies, mixed content, CORS), Mozilla Observatory, Hardenize.
Below: competitor overview, feature-by-feature comparison, when Enterno.io wins, FAQ.
About the Competitor
SecurityHeaders.com launched in 2014 by Scott Helme. Free, no signup, A-F grade based on presence/absence of 6 core headers + correctness. Result in 2-5 s. No API, no monitoring.
Enterno.io vs Competitor — Feature Comparison
| Feature | Enterno.io | Competitor |
|---|---|---|
| HTTP security header grade | ✅ | ✅ |
| Cookies security (HttpOnly, Secure, SameSite) | ✅ | ❌ |
| CORS check | ✅ | ❌ |
| Mixed Content scanner | ✅ | ❌ |
| SSL/TLS audit in same report | ✅ | ❌ |
| Continuous monitoring | ✅ | ❌ |
| API | ✅ Pro | ❌ |
| PDF report | ✅ | ❌ |
When to Pick Enterno.io
- You want a full-stack security audit in one report (not just headers)
- You need continuous monitoring with regression alerts
- You automate via API
- If you only need a quick header grade — SecurityHeaders.com is lean and faster
Why teams trust us
How it works
Enter site URL
Security headers analyzed
Get grade A–F
What Does the Security Analysis Check?
The tool checks HTTP security headers, SSL/TLS configuration, server info leaks, and protection against common attacks (XSS, clickjacking, MIME sniffing). A grade fromA to F shows overall security level.
Header Analysis
Checking Content-Security-Policy, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and more.
SSL Check
TLS version, certificate expiry, chain of trust, HSTS support.
Leak Detection
Finding exposed server versions, debug modes, open configs, and directories.
Report with Recommendations
Detailed report explaining each issue with specific steps to fix it.
Who uses this
Security teams
HTTP header audit
DevOps
config verification
Developers
CSP & HSTS setup
Auditors
compliance checks
Common Mistakes
Strict-Transport-Security.Server: Apache/2.4.52 helps attackers find exploits. Hide the version.DENY or SAMEORIGIN.nosniff, browsers may misinterpret file types (MIME sniffing).Best Practices
Content-Security-Policy-Report-Only, monitor violations, then enforce.Server, X-Powered-By, X-AspNet-Version from responses.Get more with a free account
Security check history and HTTP security header monitoring.
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How-to
Frequently Asked Questions
Does Enterno match SecurityHeaders.com grade?
Yes, the algorithm is identical (Helme methodology). A+ on SecurityHeaders = A+ on Enterno Security Scanner.
Is Scott Helme still maintaining it?
Yes, in 2026 the tool is active. But scope stays narrow — response headers only. New features are rare.
Mozilla Observatory vs SecurityHeaders.com?
Mozilla Observatory goes deeper (+ CAA, Subresource Integrity, Redirection) but is slower and more complex. Enterno combines both.
How do I monitor security headers continuously?
Enterno.io Monitor → New → type "Security" → interval 1 hour. Alert on regression (missing header, weakened CSP).