List of Alternatives of Postman
1) Voiden
Modern, markdown-based API client focused on flexibility and avoiding vendor lock-in.
- Uses open formats
- IDE-friendly workflows
- Built for developers who prefer files over heavy UI platforms
- Lightweight, version-control friendly
GitHub: https://github.com/VoidenHQ/voiden
If you care about portability and control, this direction makes sense.
2) Insomnia
Popular REST/GraphQL client with a clean UI.
- Strong plugin ecosystem
- Environment management
- Good GraphQL support
GitHub: https://github.com/Kong/insomnia
Great if you want something lighter than Postman but still polished.
3) Bruno
File-based API client using .bru files.
- Git-friendly
- Offline-first
- Simple interface
GitHub: https://github.com/usebruno/bruno
Good for dev teams who want local collections — but uses its own file format.
4) Hoppscotch
Open-source, web-based API testing tool.
- Fast and lightweight
- REST, GraphQL, WebSockets
- Self-hostable
GitHub: https://github.com/hoppscotch/hoppscotch
Nice if you want something quick and browser-native.
5) Thunder Client
VS Code extension for API testing.
- Works inside VS Code
- Simple collections
- Minimal setup
GitHub: https://github.com/rangav/thunder-client-support
Good if you live inside VS Code and want zero context switching.
7) HTTPie
CLI-first HTTP client.
- Terminal-based
- Great for scripting
- Clean syntax
GitHub: https://github.com/httpie/httpie
Best for developers comfortable in the command line.
9) Paw
Mac-only API client.
- Native macOS UI
- Advanced request building
- Strong testing features
GitHub: ❌ Closed source (no public GitHub repo) Website: https://paw.cloud
More premium and Mac-focused.