> /v1/alternatives/postman
Open source alternatives to Postman[011]
Postman is an API client and collaboration platform for building, testing, documenting and mocking HTTP, GraphQL and gRPC requests. Below are 11 self-hostable open source alternatives, ranked by GitHub popularity.
Hoppscotch
Open source API development ecosystem
★ STARS
79.1k
⑂ FORKS
5.9k
Bruno
Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
★ STARS
43.6k
⑂ FORKS
2.4k
Insomnia
The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.
★ STARS
38.4k
⑂ FORKS
2.3k
Yaak
Intuitive desktop API client for REST, GraphQL, WebSockets, SSE and gRPC, built with Tauri.
★ STARS
18.9k
⑂ FORKS
791
Scalar
Scalar is an open-source API platform: Modern REST API Client �� Beautiful API References 1st-Class OpenAPI/Swagger Support
★ STARS
15.0k
⑂ FORKS
835
Mockoon
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
★ STARS
8.2k
⑂ FORKS
459
Requestly
Open-Source Postman alternative
★ STARS
6.7k
⑂ FORKS
647
HTTPie
HTTPie Desktop — cross-platform API testing client for humans. Painlessly test REST, GraphQL, and HTTP APIs.
★ STARS
3.9k
⑂ FORKS
56
Firecamp
Developer-first OpenSource API DevTool, Postman/Insomnia alternative.
★ STARS
2.6k
⑂ FORKS
166
Voiden
Design, Test and Document APIs in plain Markdown. Compose Requests with API blocks. Reuse, Replace & Version everything just like code. Offline, Truly Git Native, No Lock-in.
★ STARS
1.0k
⑂ FORKS
33
Gravitee
Gravitee.io - OpenSource API Management
★ STARS
414
⑂ FORKS
112
// EDITOR'S TAKE
Bruno is where most ex-Postman users land, because collections are plain files in your repo that get reviewed like code and no account is required. Hoppscotch suits teams who want a hosted, browser-based workspace instead, and Insomnia is still capable but has drifted toward the cloud-account friction people left Postman to escape.
// FREQUENTLY ASKED
What is the best open source Postman alternative?
Hoppscotch is the most popular open source Postman alternative by GitHub stars (79,134 stars). The other 10 options are ranked above.
Are these Postman alternatives self-hostable?
Yes — every project listed here is open source and runs on your own infrastructure. Click into a project to see its license, stars, language, and current health status.
Are they free?
All projects shown are free and open source. Check each project's license page for the terms — most are MIT, Apache 2.0, or AGPL.