Alternatives
Open Source Alternatives to Postman
Postman alternatives listed by the directory.
Open Source Alternatives to Postman
Use the same directory search, ordering, and pagination controls inside this collection.
11 of 11 tools
Firecamp
AGPL-3.0
All-in-one platform for API testing, documentation, and collaboration, simplifying the entire API development lifecycle.
Scalar
MIT
Scalar is an open-source tool for building, customizing, and hosting interactive API documentation with OpenAPI support.
Mockoon
MIT
Create, run, and share mock REST APIs without coding. Boost productivity with an intuitive interface and powerful features.
Bruno
MIT
A modern, user-friendly API client that simplifies API testing and development with a clean interface and powerful features.
Gravitee
Apache-2.0
Full-lifecycle API management platform that unifies synchronous and asynchronous ecosystems. Manage APIs, event streams, and AI agents with enterprise security and 4x faster gateway performance.
Hoppscotch
MIT
Lightweight, fast, and feature-rich API client for developers. Test, debug, and document APIs with ease in a clean, modern interface.
HTTPie
BSD-3-Clause
Intuitive, user-friendly CLI tool for making HTTP requests, debugging APIs, and testing web services with ease and efficiency.
Insomnia
Apache-2.0
Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collaborate on APIs with ease across platforms.
Requestly
Unknown
A powerful browser extension and desktop app for developers to manipulate network requests, debug APIs, and improve web app testing
Voiden
Apache-2.0
Offline-first API workspace that unifies specs, docs, tests, and mocks in programmable Markdown blocks. Version control everything in plain text files.
Yaak
MIT
A modern API client offering local-only data storage, Git integration, plugin extensibility, and multi-protocol support for developers.