Open-source alternatives to Postman
4 open-source projects are offered as replacements for Postman. Hoppscotch is the most starred. Running one yourself trades the subscription for your own hosting and upkeep, so the table below leads with what decides that trade: whether the project is alive, what its licence lets a business do, and whether there is a container command to start from.
Side by side
| Project | Stars | Activity | Licence | Self-host | Language |
|---|---|---|---|---|---|
 Hoppscotch | 80,654 | Active | Permissive | ○ | TypeScript |
 Insomnia | 40,057 | Active | Permissive | ○ | TypeScript |
 Karate | 8,988 | Active | Permissive | ○ | Java |
 Milkman | 1,342 | Active | Permissive | ○ | Java |
Each one, briefly
- Hoppscotch80,654 stars · permissive · active
Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia
- Insomnia40,057 stars · permissive · active
The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.
Where this comes from
Which projects are offered against Postman comes from opensourcealternative.to, re-read weekly. Every figure in the table is read from the project’s own repository. We have not run these projects, and we hold no price for Postman. Browse every open-source alternative.