Different tools for different jobs
ImmuniWeb is a security platform primarily known for enterprise web application penetration testing and its free Community Edition tools. The free website test performs a broad scan covering outdated software, known CVEs, malware blacklist status, and privacy compliance signals alongside a basic header review. It is oriented toward finding vulnerabilities in web applications.
SiteSecurityScore focuses specifically on website security configuration: the HTTP headers your server sends, how your TLS certificate and cipher suites are set up, whether your DNS records authenticate email correctly, and how your cookies are scoped and protected. The analysis goes deep on each of these areas rather than spreading across vulnerability types.
If you need to discover web application vulnerabilities, ImmuniWeb serves that purpose. If you need to know whether your security headers are correctly configured and what exactly to fix, SiteSecurityScore gives you the more thorough analysis.
Feature comparison
Security Headers
| Feature | SiteSecurityScore | ImmuniWeb |
|---|---|---|
| Security headers analyzed | 15+ | ~8 |
| COOP, COEP, CORP headers | ||
| Deep CSP directive analysis | ||
| DNS security (SPF, DKIM, DMARC) | ||
| Cookie security attributes | ||
| CORS configuration check | ||
| HSTS configuration and preload status | ||
| TLS/SSL configuration |
Features
| Feature | SiteSecurityScore | ImmuniWeb |
|---|---|---|
| Unlimited free scans | ||
| REST API access | ||
| Browser extension (scan authenticated pages) | ||
| PDF security reports | ||
| Free header generator tools | ||
| Actionable header fix recommendations |
What SiteSecurityScore checks in depth
15+ security headers
Checks all major headers including COOP, COEP, CORP, Origin-Agent-Cluster, and Permissions-Policy in addition to the core eight that most tools cover.
Deep CSP analysis
Evaluates every directive in your Content Security Policy. Flags unsafe-inline, wildcard sources, missing fallbacks, and configurations that exist on paper but offer little real protection.
DNS security records
SPF, DKIM, and DMARC record analysis. Identifies gaps in your email authentication setup before they can be exploited for phishing or domain spoofing.
Cookie security audit
Checks every cookie for HttpOnly, Secure, SameSite, Path, and Domain attributes. Surfaces session hijacking and CSRF risks at a glance.
TLS/SSL configuration
Protocol version, cipher suites, certificate validity, and HSTS preload status. Know whether your encryption setup meets current standards.
CORS review
Checks Access-Control-Allow-Origin and related headers for overly permissive cross-origin configurations that could expose data to untrusted origins.
Unlimited free scanning
ImmuniWeb's Community Edition rate-limits free scans. For teams managing multiple domains or running scans as part of a regular review cycle, this becomes a genuine bottleneck. You cannot run a scan every time you deploy a change or need a quick check across environments.
SiteSecurityScore has no scan limit on the free tier. Scan as many sites as you need, as often as you need, without hitting a daily cap or creating an account. This makes it practical for agencies managing client sites, developers checking configurations across staging and production, and security teams that monitor a portfolio of domains.
SiteSecurityScore
Unlimited
Free scans, no account needed
ImmuniWeb
Rate limited
Free Community Edition scans
API access for automation
The SiteSecurityScore API returns structured JSON for every scan, covering headers, CSP directives, TLS configuration, DNS records, and cookie data in a single request. Use it to integrate header checks into your CI/CD pipeline, set up scheduled monitoring, or feed results into a compliance dashboard.
curl -X POST https://www.sitesecurityscore.com/api/scan \
-H "x-api-key: sss_your_api_key_here" \
-H "Content-Type: application/json" \
-d '{"url": "example.com"}'Free security header generators
Finding a missing or misconfigured header is only half the work. You also need the right values. SiteSecurityScore includes free generator tools that produce server-specific configuration examples you can copy and deploy directly.
Scan pages behind login walls
Chrome Extension
Server-side scanners including ImmuniWeb can only reach publicly accessible URLs. The SiteSecurityScore browser extension reads real response headers directly from your authenticated browser sessions. Scan admin panels, staging environments, and internal tools that no external scanner can reach.
Try a free scan right now
Enter any URL and get a full security report covering 15+ headers, CSP, TLS, DNS records, and cookies. No account required, no scan limits.
Start scanningFrequently asked questions
Is SiteSecurityScore a free alternative to ImmuniWeb?
Yes. SiteSecurityScore offers unlimited free scans with no account required. Every scan covers 15+ security headers, TLS/SSL configuration, DNS security records (SPF, DKIM, DMARC), and cookie attributes. Paid plans add API access, PDF reports, and monitoring features.
What does SiteSecurityScore check that ImmuniWeb does not?
SiteSecurityScore checks more than twice as many security headers as ImmuniWeb's free test, including newer standards like COOP, COEP, and CORP. It performs a deep directive-by-directive CSP analysis, audits every cookie's security attributes, analyzes DNS security records (SPF, DKIM, DMARC), and checks CORS configuration. ImmuniWeb focuses more on web application vulnerabilities and software CVE detection, which SiteSecurityScore does not cover.
Does ImmuniWeb limit free scans?
ImmuniWeb's Community Edition rate-limits free scans. For teams that need to scan multiple sites or run scans regularly as part of a review cycle, this becomes a practical constraint. SiteSecurityScore has no scan limit on the free tier.
Does SiteSecurityScore have an API?
Yes. SiteSecurityScore provides a REST API that returns structured JSON results for every scan, covering headers, CSP directives, TLS configuration, DNS records, and cookie data. The API is available through paid plans and integrates into CI/CD pipelines, monitoring workflows, and compliance dashboards.
Which tool should I use for web application security testing?
If your goal is to audit security header configuration, TLS setup, DNS records, and cookie attributes, SiteSecurityScore gives you the deeper analysis. If you need to find web application vulnerabilities like SQL injection, XSS, or outdated software components, ImmuniWeb's vulnerability scanning capabilities are designed for that job.