soapUI is a popular open-source API testing tool that allows users to test SOAP and REST APIs.
Best Hoppscotch Alternatives ranked by AI · updated Aug 2026
Hoppscotch is an open-source, browser-based API development and testing platform. It supports REST, GraphQL, WebSocket, SSE, and socket testing for developers who want a lightweight alternative.
Top 6 Hoppscotch alternatives
Postman is a collaboration platform for API development used by millions of developers.
Free with paid plans available
HTTPie is a command-line HTTP client that is user-friendly and intuitive.
Milkman is a free, open-source desktop API client for developers who need to create, send, and organize HTTP requests. Its plugin architecture...
Pros
- Free and open source without a required cloud account
- Extensible plugin architecture supports more than basic REST requests
- Local-first workflow is useful for privacy-sensitive development
Cons
- Smaller ecosystem and community than Postman or Insomnia
- Less polished collaboration and team management than commercial clients
- Desktop interface is less familiar to many developers than browser-first tools
GraphQL Centaur is a desktop client for developers who need to explore and test GraphQL APIs. It provides an interactive query editor...
Pros
- Dedicated GraphQL workflow rather than a general REST client
- Desktop application supports local development and custom API headers
- Interactive schema documentation helps explore unfamiliar APIs
Cons
- Smaller ecosystem and community than GraphiQL, Postman, or Insomnia
- Fewer collaboration and monitoring features than hosted GraphQL platforms
- Less actively maintained than newer GraphQL clients
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