ModHeader vs Requestly: Which is Better in 2026?
Choosing between ModHeader and Requestly comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
ModHeader
Modify HTTP request and response headers directly from your browser for web development and debugging.
Best for you if:
- • You need browser devtools features specifically
- • Browser extension to modify HTTP request and response headers.
- • Speeds up web development and debugging by simulating various header scenarios.
Requestly
Build, test, and debug APIs faster with a lightweight, open-source API client and web debugger.
Best for you if:
- • You need API tools features specifically
- • Open-source API client and web debugger for building, testing, and mocking APIs.
- • Intercepts and modifies network requests, headers, and API responses in real-time.
| At a Glance |  ModHeader |  Requestly |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Browser DevTools | API Tools |
Rating | - | 4.7/5 |
Choose ModHeader or Requestly?
Choose ModHeader if
Modify HTTP request and response headers directly from your browser for web development and debugging.
- Simplifies web development and debugging by allowing quick header modifications.
- Helps simulate various user environments and edge cases.
- Reduces debugging time and potential production bugs.
- Your work is browser devtools-shaped, not API tools-shaped
Choose Requestly if
Build, test, and debug APIs faster with a lightweight, open-source API client and web debugger.
- Free and open-source, offering a cost-effective solution.
- Lightweight and fast, designed for quick operations.
- Comprehensive features for both API testing and web debugging.
- Your work is API tools-shaped, not browser devtools-shaped
| Feature | ModHeader | Requestly |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| User Rating | No ratings yet | ★4.7/5 5 reviews |
| Categories | Browser DevToolsAPI Tools | API ToolsDebugging |
In-Depth Analysis
ModHeader
Modify HTTP request and response headers directly from your browser for web development and debugging.
Strengths
- +Simplifies web development and debugging by allowing quick header modifications.
- +Helps simulate various user environments and edge cases.
- +Reduces debugging time and potential production bugs.
- +Supports testing of feature flags without code changes.
- +Offers additional tools for header testing and security policy editing.
Weaknesses
- -Primarily a browser extension, may not cover all advanced network debugging needs.
- -Specific pricing details are not immediately available on the provided pages.
Key features
Requestly
Build, test, and debug APIs faster with a lightweight, open-source API client and web debugger.
Strengths
- +Free and open-source, offering a cost-effective solution.
- +Lightweight and fast, designed for quick operations.
- +Comprehensive features for both API testing and web debugging.
- +Strong emphasis on security and compliance for enterprise use.
- +Supports collaboration with team workspaces and Git sync.
Weaknesses
- -Requires a desktop and desktop browser for full functionality.
- -Desktop app currently only explicitly mentioned for Mac, implying limited cross-platform desktop support.
- -May require some learning curve for users accustomed to other API tools.
Key features
Pricing: ModHeader vs Requestly
| Plan | ModHeader | Requestly |
|---|---|---|
| Tier 1 | Free Free | Free Free |
| Tier 2 | $4.00/month ModHeader Pro | $10/month Basic |
| Tier 3 | $2.00/month ModHeader Pro (Annual billing) | $25/month Pro |
| Tier 4 | $60.00 ModHeader Pro (One time payment) | N/A |
Pricing verified from each vendor's public pricing page. Compare in detail on ModHeader pricing and Requestly pricing.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: ModHeader
Want the highest-rated option?
Requestly is rated 4.7/5. ModHeader has no ratings yet.
Go with: Requestly
Value user reviews?
ModHeader: no ratings yet. Requestly: 5 reviews (4.7/5).
Go with: Requestly
3 Questions to Help You Decide
What's your budget?
Both are freemium. Pricing won't help you decide here.
What's your use case?
ModHeader is a browser devtools tool. Requestly is in API tools. Pick the category that matches your needs.
How important are ratings?
Requestly is rated 4.7/5; ModHeader has no ratings yet.
Key Takeaways
ModHeader
- Free tier available
- Our pick for this comparison
Requestly
- Better fit for API tools
The Bottom Line
ModHeader is our pick.
Frequently Asked Questions
Is ModHeader or Requestly better?
ModHeader is rated in our evaluation. Both are freemium.
What are ModHeader and Requestly used for?
ModHeader: Modify HTTP request and response headers directly from your browser for web development and debugging.. Requestly: Build, test, and debug APIs faster with a lightweight, open-source API client and web debugger..
What does ModHeader cost vs Requestly?
ModHeader is freemium (free tier + paid plans). Requestly is freemium (free tier + paid plans). Visit their websites for detailed pricing.