A curated collection of the 11 best open source alternatives to Postman.
The best open source alternative to Postman is Hoppscotch. If that does not suit you, we have compiled a ranked list of other open source Postman alternatives to help you find a suitable replacement.
Postman alternatives are mainly API Clients. Browse these if you want a narrower list of alternatives or are looking for a specific functionality of Postman.
Lightweight, fast, and feature-rich API client for developers. Test, debug, and document APIs with ease in a clean, modern interface.
Lightweight, fast, and feature-rich API client for developers. Test, debug...
A modern, user-friendly API client that simplifies API testing and development with a clean interface and powerful features.
A modern, user-friendly API client that simplifies API testing and develop...
Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collaborate on APIs with ease across platforms.
Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collabo...
A modern API client offering local-only data storage, Git integration, plugin extensibility, and multi-protocol support for developers.
A modern API client offering local-only data storage, Git integration, plu...
Scalar is an open-source tool for building, customizing, and hosting interactive API documentation with OpenAPI support.
Scalar is an open-source tool for building, customizing, and hosting inter...
Create, run, and share mock REST APIs without coding. Boost productivity with an intuitive interface and powerful features.
Create, run, and share mock REST APIs without coding. Boost productivity w...
A powerful browser extension and desktop app for developers to manipulate network requests, debug APIs, and improve web app testing
A powerful browser extension and desktop app for developers to manipulate ...
Intuitive, user-friendly CLI tool for making HTTP requests, debugging APIs, and testing web services with ease and efficiency.
Intuitive, user-friendly CLI tool for making HTTP requests, debugging APIs...
All-in-one platform for API testing, documentation, and collaboration, simplifying the entire API development lifecycle.
All-in-one platform for API testing, documentation, and collaboration, sim...
Offline-first API workspace that unifies specs, docs, tests, and mocks in programmable Markdown blocks. Version control everything in plain text files
Offline-first API workspace that unifies specs, docs, tests, and mocks in ...
Full-lifecycle API management platform that unifies synchronous and asynchronous ecosystems. Manage APIs, event streams, and AI agents with enterprise
Full-lifecycle API management platform that unifies synchronous and asynch...
