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Open-Source Postman alternative
Requestly helps developers build faster by intercepting, mocking, and testing API responses. No more waiting for backend developers, struggling with flaky staging environments, or fighting over API contracts. With 200,000+ active installs, Requestly is trusted by Google, Amazon, Workday, Indeed, and many other Fortune 500 companies.
Requestly is an open-source, privacy-first API client designed to send, test, and debug APIs with local-first workflows. It emphasizes local data control, Git-based syncing, and self-hosted or local workspaces as alternatives to cloud-based API clients.
Requestly provides a desktop-focused API client that lets you organize APIs into collections, manage environments, run API tests, and intercept/modify HTTP requests and responses. It supports pre-request and post-response scripts, import/export from Postman/OpenAPI, GraphQL testing, environment variables, local workspaces, and Git synchronization of API collections. It offers features like HTTP interception, URL redirects, header and body modification, and the ability to mock API/GraphQL responses, all while keeping data local with no mandatory cloud login.
Who it’s for: developers and engineering teams (frontend/backend) who build and test APIs, QA engineers, and organizations that require local-first data control and self-hosted workflows
mention of multiple platform availability (desktop, Chrome extension), SOC-II compliance, SSO, RBAC, enterprise features, and a sizable user base with 300,000+ developers cited
Sachin is the co-founder & CEO, Requestly. Sachin plays a leading role in defining the vision of the company, the product direction, talking to existing & potential customers. He has over 10 years of industry experience and has worked with Google, Adobe & Grofers in the past. He built many side projects & participated in many hackathons. Requestly was also started as a side-project on which he worked tirelessly for the sake of love of the product eventually making it into it full-time.
A better alternative to Postman & Charles Proxy
Requestly launches an API testing and mocking platform that lets developers intercept, mock, and test API responses in browsers and mobile apps, aiming to reduce dependency on backend teams and flaky staging environments. It targets frontend, QA, and enterprise teams and highlights collaboration, complete flow mocks, and a growing client base including Fortune 500 companies.
How Requestly’s homepage introduced itself over the years — each line is the page title the web actually saw, linked to that moment’s archived capture.
The open source Postman alternative.
Open-source API & UI test automation
