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API clients

Send, test and document HTTP, GraphQL and other API requests.

Paid apps and their free alternatives

Open one to see every alternative, ranked.

Postman
4 free alternatives
Top pick:BrunoLicense: Open source
Saves $228 USD a year

Free API clients

Every free tool in this category, by name.

Filter alternatives

4 alternatives

Bruno
Open-source API client that stores collections as plain files in your Git repository, for REST, GraphQL, gRPC and WebSocket testing.
License: Open source
- Windows
- macOS
- Linux
- Command line
Status: Active
This replaces Postman
Hoppscotch
Open-source API client that runs in a browser, as a desktop app or on your own server, for REST, GraphQL and WebSocket testing.
License: Open source
- Windows
- macOS
- Linux
- Web
- Self-hosted
Status: Active
This replaces Postman
Insomnia
API client and design tool for REST, GraphQL, gRPC, WebSocket and SSE with Git sync, mock servers and the Inso command-line tool.
License: Open source
- Windows
- macOS
- Linux
- Command line
Status: Active
This replaces Postman
Yaak
Desktop API client built with Tauri and Rust for REST, GraphQL, gRPC, WebSocket and SSE, with an offline-first design.
License: Open source
- Windows
- macOS
- Linux
Status: Active
This replaces Postman