Open-Source API Mocking & Testing Tool

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Copyright © 2026 BrowserStack, Inc. All rights reserved.
Features
Redirect URL Replace Rule Modify API Response Modify Headers Insert Scripts Modify Query Param Cross Device Test GraphQL APIs
Resources
Pricing Blog Use Cases Academy Privacy Policy Terms of Service Refunds and Cancellations
Company
About Us Contact Us Careers Press EULA Community Guidelines
Compliance
SOC2 DPA GDPR Great Place
Developers
Release notes Report issues GraphQL support OSS friends Github Join Community
Compare Requestly with
Charles Proxy Wireshark Insomnia
Modheader Fiddler Bruno
Proxyman Mockoon
HTTP Toolkit Postman
Resource Override Hoppscotch
Download HTTP Interceptor
Desktop
Chrome
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Firefox
Safari
Compliance & accreditations
SOC 2
GDPR
GREAT PLACE

Privacy first API Client

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Copyright © 2026 BrowserStack, Inc. All rights reserved.
Features
Save & Organize Requests Environment Variables GraphQL APIs Pre & Post Scripts API Test Generator Collection runner Import / Export Collaboration & Sharing
Resources
Pricing Blog Use Cases Academy Privacy Policy Terms of Service Refunds and Cancellations
Company
About Us Contact Us Careers Press EULA Community Guidelines
Compliance
SOC2 DPA GDPR Great Place
Developers
Release notes Report issues GraphQL support Github Join Community
Compare Requestly with
Postman
Hoppscotch
Insomnia
Bruno
Download HTTP Interceptor
Desktop
Chrome
Edge
Firefox
Safari
Compliance & accreditations
SOC 2
GDPR
GREAT PLACE

How to Guides

Import Postman Collections into Requestly: Migration Guide

Introducing Dynamic Variables: Generate Realistic Test Data Instantly

How to Write Scripts to Validate API Response Data

What is cURL? Complete Guide to cURL Commands, Options & API Testing

How to convert OpenAPI spec to an API collection

Case Studies

How Upscayl Made API Testing Repo-Native with Requestly

How Cyrisma Managed 125K APIs with Requestly

AB Tasty scales testing and demos with Requestly