
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.

Postman
Proxyman.io
Hoppscotch
ngrok
HTTP Toolkit
Fiddler
Charles Proxy
A Powerful API Mocking and Testing Tool

Which is more popular?
Based on our record, Security Headers should be more popular than Requestly. It has been mentioned 70 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | securityheaders.com | requestly.com |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from the United States · 20 - 49 employees · 2021 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Security Headers yet.
Requestly is a modern and powerful companion for API Development and Testing. It is an open-source tool purpose-built to speed up and simplify API development workflow for developers and QAs. It is a combination of API Client and HTTP Interceptor that helps create and share API Contracts, testing...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Security Headers yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
HTTP Security Headers | Part 01
More videos
Get Started with Requestly
More videos
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Security Headers and Requestly.
Requestly's answer:
Requestly's answer:
Front-end developers, QAs, PMs, Digital Marketers
Requestly's answer:
Requestly is an open-source API development and testing tool that combines the capabilities of an API Client and HTTP Interceptor, making it a better alternative to Postman + Charles Proxy. It simplifies API mocking, request modification, and debugging with an intuitive no-code interface, enabling developers and QAs to test APIs efficiently.
Share your experience with using Security Headers and Requestly. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


On the pricing front, Requestly strikes a balance between affordability and functionality. It is an open-source tool, offering freemium to individual developers and affordable pricing plans for team collaboration. We...
Recommendations tracked on public social media and blogs since March 2021.


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 / 18 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
If you want to try a local-first workflow, you can start using Requestly here: https://requestly.com. - Source: dev.to / 11 months ago
That’s where automation changes the game. By pairing Cursor, an AI-powered coding assistant, with Requestly's local-first API testing and mocking platform, you can offload the grunt work of writing tests to AI while keeping execution... - Source: dev.to / 11 months ago
Requestly is a versatile browser extension and web client used to intercept, mock, and debug APIs in real-time—perfect for frontend developers. - Source: dev.to / over 1 year ago
When comparing Security Headers and Requestly, you can also consider the following products.

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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The Collaboration Platform for API Development
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Hardenize provides a comprehensive and free assessment of web site network and security configuration.
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Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
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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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Open source API development ecosystem
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