ModHeader vs Requestly: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for ModHeader and Requestly side by side. This page compares data; it is not a hands-on review.
On the data: On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, 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 want simplifies web development and debugging by allowing quick header modifications
Requestly
Build, test, and debug APIs faster with a lightweight, open-source API client and web debugger.
Best for you if:
- • You want free and open-source, offering a cost-effective solution
| At a Glance | ModHeader | Requestly |
|---|---|---|
Starts at | Free plan, paid from $2/mo, billed monthly ModHeader Pro (Annual billing) plan | Free plan |
Category | API Tools Testing & QA | API Tools Developer Tools |
Rating | n/a | 4.7/5 G2 4.7 5 reviews |
Free plan | Yes | Yes |
Watch out for | Monthly billing is double annual ($4 vs $2). | n/a |
Choose ModHeader or Requestly?
Choose ModHeader if
- You want simplifies web development and debugging by allowing quick header modifications
- You want helps simulate various user environments and edge cases
Choose Requestly if
- You want free and open-source, offering a cost-effective solution
- You want lightweight and fast, designed for quick operations
In-Depth Analysis
ModHeader
Modify HTTP request and response headers directly from your browser for web development and debugging.
ModHeader offers a very fair and generous pricing structure, especially for individual developers.
Watch out
Monthly billing is double annual ($4 vs $2).
Strengths
- Pro: Simplifies web development and debugging by allowing quick header modifications.
- Pro: Helps simulate various user environments and edge cases.
- Pro: Reduces debugging time and potential production bugs.
- Pro: Supports testing of feature flags without code changes.
- Pro: Offers additional tools for header testing and security policy editing.
Weaknesses
- Con: Primarily a browser extension, may not cover all advanced network debugging needs.
- Con: 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
- Pro: Free and open-source, offering a cost-effective solution.
- Pro: Lightweight and fast, designed for quick operations.
- Pro: Comprehensive features for both API testing and web debugging.
- Pro: Strong emphasis on security and compliance for enterprise use.
- Pro: Supports collaboration with team workspaces and Git sync.
Weaknesses
- Con: Requires a desktop and desktop browser for full functionality.
- Con: Desktop app currently only explicitly mentioned for Mac, implying limited cross-platform desktop support.
- Con: May require some learning curve for users accustomed to other API tools.
Key features
Plans and prices: ModHeader vs Requestly
| Tool | Plans and prices | Source |
|---|---|---|
| ModHeader |
| modheader.com/pricing read Sep 29, 2026 |
| Requestly | No plan prices on file | requestly.io/pricing |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on ModHeader pricing and Requestly pricing.
Key Takeaways
ModHeader
- Choose if you want modify HTTP request and response headers directly from your browser for web development and debugging
Requestly
- Choose if you want build, test, and debug APIs faster with a lightweight, open-source API client and web debugger
What the data shows
On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
- Only Requestly has a published user rating (4.7/5 from 5 reviews); ModHeader has none we can show.
- ModHeader starts at $2/mo, billed monthly; Requestly has no public paid plan price on file.
- Both have a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do ModHeader and Requestly compare in 2026?
On the data below the two are close or not directly comparable, so we do not name a winner for this pair. Only Requestly has a published user rating (4.7/5 from 5 reviews); ModHeader has none we can show. ModHeader starts at $2/mo, billed monthly; Requestly has no public paid plan price on file. Both have a free plan.
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's cheapest paid plan is ModHeader Pro (Annual billing) at $2/mo, billed monthly; it also has a free plan. Requestly has no public paid-plan price on file. Prices read on the vendors' pricing pages, latest check Sep 29, 2026.
What's the main difference between ModHeader and Requestly?
ModHeader's main strength: simplifies web development and debugging by allowing quick header modifications. Requestly's main strength: free and open-source, offering a cost-effective solution.