the open source movement

Replace Postman.

8 open source alternatives, ranked by health. We re-check every project weekly, so you don’t migrate to something abandoned.

Ranked by health

  1. HoppscotchAPI development platform for building and testing REST, GraphQL and WebSocket requests, available on web, desktop and CLI.★ 81k MIT TypeScript self-host managed
  2. BrunoOffline-first API client that stores collections as plain-text files on your filesystem for versioning with Git.★ 47k MIT JavaScript self-host
  3. InsomniaThe open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.★ 40k Apache-2.0 TypeScript self-host managed
  4. YaakDesktop API client for organizing and sending REST, GraphQL, WebSocket, Server-Sent Events and gRPC requests.★ 19k MIT TypeScript self-host
  5. ScalarAPI platform with a REST API client and interactive API reference docs generated from OpenAPI documents.★ 16k MIT TypeScript self-host managed
  6. ATACTerminal-based API client for building, sending and organizing HTTP requests in collections.★ 3.7k MIT Rust self-host
  7. API DashCross-platform desktop and mobile API client built with Flutter for creating and testing HTTP and GraphQL requests.★ 2.9k Apache-2.0 Dart self-host
  8. VoidenOffline API workspace for designing, testing and documenting APIs in Markdown files versioned with Git.★ 1.9k Apache-2.0 TypeScript self-host
How the ranking works

Health blends commit recency, release cadence, issue throughput, contributor breadth and star growth. Stars are shown but never ranked on. The full method.