Open Source Alternatives
Alternatives to Postman
API development and testing platform.
Postman is a trademark of its respective owner.
Updated May 2026
What you gain
- ✓No per-seat pricing that scales with your team
- ✓Full ownership of your API collections and test scripts
- ✓No cloud dependency for running local API tests
- ✓Community-driven development with open formats
What you give up
- △No Postman Flows for visual API workflow orchestration
- △No built-in Mock Server with automatic response generation
- △No Postman Interceptor for capturing browser HTTP traffic
- △No team workspace with real-time collection sync
Switching Cost
Postman collections export as JSON and import cleanly into most alternatives. That's the easy part. The hard part is Postman-specific features: mock servers, monitors, environment sharing across teams, and the collaboration layer. Solo developers can switch in an afternoon. Teams with shared workspaces, CI/CD integrations, and hundreds of collections should budget a few days to rebuild the workflow, not just the requests.
| Insomnia | Bruno | Hoppscotch | |
|---|---|---|---|
| Overlap | 82% | 78% | 75% |
| Migration | trivial | trivial | trivial |
| License | Apache License 2.0 | MIT License | MIT License |
| Best for | Everyone | Everyone | Everyone |
We find the alternatives so you don't have to
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Drop-in Replacements
Ranked by feature coverage
Insomnia
8382% coverageCross-platform API client for REST, GraphQL, gRPC
Insomnia is a desktop API client for designing, debugging, and testing REST, GraphQL, gRPC, and WebSocket APIs, organized into collections. It's a workbench for APIs: REST, GraphQL, gRPC, and WebSockets all in one interface.
Bruno
8378% coverageOpen source IDE for exploring and testing APIs
It's an API client that stores everything in plain text files on your filesystem. No cloud sync, no account required, no collections locked in a proprietary format.
Hoppscotch
8675% coverageOpen source API development ecosystem
REST, GraphQL, WebSocket, SSE, MQTT, and Socket.IO all in one tab. Open it, start testing.
Building Blocks
Postman is a platform. It bundles multiple capabilities into one subscription. These tools each cover one piece. Teams often assemble 2–3 of them instead of paying for the full suite.
AWS Cognito