HTTPieSend HTTP requests and inspect API responses from the terminal.
Free and open source (BSD-3-Clause licence per GitHub).
Developer tools
Hoppscotch
Free optionOpen sourceBrowser
Send API requests, inspect responses and organise request collections.
What you can use it for
Send API requests, inspect responses and organise request collections.
- Covers the core everyday task of Postman and Insomnia: building, sending and organizing API requests.
- Creators report keeping it pinned in a browser tab for quick endpoint testing, WebSocket debugging and shareable team API documentation, and call it a simple Postman replacement.
Workflow coverage and comparison notes
Send REST, GraphQL and WebSocket requests and manage API collections for everyday endpoint testing. Replaces the API-client slice of the linked products; not mock-server infrastructure, full API design/governance, enterprise controls or hosted monitoring.
Before you switch
Not a 1:1 Postman replacement: one author who moved from years of Postman still recommends keeping Postman for complex workflows and using Hoppscotch for daily testing. Browser cross-origin requests may need the CORS extension or agent. Postman-specific collaboration, monitoring and marketplace features need separate evaluation.
Alternatives to these paid apps
Each comparison covers the workflow described above, rather than every paid feature.
More for the same workflow
See alternatives →HTTPie
InsomniaSend API requests, organise collections and run them locally.
Free Essentials · unlimited projects and collection runs · Git sync up to 3 users
REST Client for VS CodeSend HTTP requests from version-controlled files inside VS Code.
Free extension · local request files · no request quota