
Sucuri Security Scanner
Mozilla Observatory
MxToolBox
Hardenize
HTTP Observatory
Qualys SSL Server Test
Check HTTPS, TLS certificates, security headers, DNS and email authentication (SPF, DMARC, DKIM) for free, with evidence and a prioritized fix list.

Mozilla Observatory
Hardenize
Qualys SSL Server Test
HTTP Observatory
Snyk
Sucuri Security Scanner
Detectify
Quickly and easily assess the security of your HTTP response headers.

Which is more popular?
Based on our record, Security Headers seems to be more popular. It has been mentioned 70 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | primedevforce.com | securityheaders.com |
| Pricing | — | |
| Company | Startup from the United States · 1 - 9 employees | — |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
Walkthroughs and reviews on video.
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HTTP Security Headers | Part 01
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Prime Dev Force Security and Security Headers.
Prime Dev Force Security's answer
The free check needs no account and takes seconds. Every finding explains why it was flagged and how to fix it, and the scoring method is published. When you want more, Pro adds daily monitoring with Slack, Discord or webhook alerts for $12/month, and Agency adds branded client reports for 30 domains at $49/month. It is honest about its scope: an outside-in configuration check, not a penetration test.
Prime Dev Force Security's answer
It checks web and email security in one report. Most free tools cover headers, or TLS, or DMARC; Prime Dev Force checks HTTPS, TLS, security headers, DNS and SPF/DKIM/DMARC together, and shows the evidence, severity and confidence behind every finding. The result is a ranked fix list, not just a grade.
Prime Dev Force Security's answer
Small business owners, developers and freelancers who run their own websites, and agencies who look after many client sites and need to show clients what was fixed.
Prime Dev Force Security's answer
Small business owners, developers and freelancers who run their own websites, and agencies who look after many client sites and need to show clients what was fixed.
Prime Dev Force Security's answer
Share your experience with using Prime Dev Force Security and Security Headers. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


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Recommendations tracked on public social media and blogs since March 2021.


Tracking Prime Dev Force Security since Nov 2026.
Since we were back in the security settings anyway, Claude and I went through the whole guide: added headers, set up CSP with no inline scripts, no-store. The securityheaders.com score went from F to A+. - Source: dev.to / 20 days ago
Check: Go to securityheaders.com and enter your URL. A grade below B means you're missing important ones. - Source: dev.to / 5 months ago
The curl above is the fastest check; all four lines should come back. In a browser, DevTools, Network tab, click the document request, read Response Headers. For a letter grade, securityheaders.com scores you against a known rubric. One... - Source: dev.to / 5 months ago
When comparing Prime Dev Force Security and Security Headers, you can also consider the following products.
Sucuri Security Scanner is a web-based tool that is used to protect the website from intruders and hackers.
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The Mozilla Observatory is a project designed to help developers, system administrators, and security professionals configure their sites safely and securely.
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Hardenize provides a comprehensive and free assessment of web site network and security configuration.
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All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.
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This free online service performs a deep analysis of the configuration of any SSL web server on the public Internet.
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Developed by Mozilla, the HTTP Observatory performs an in-depth assessment of a site’s HTTP headers and other key security configurations.
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