soapUI is a popular open-source API testing tool that allows users to test SOAP and REST APIs.
Best Keploy Alternatives ranked by AI · updated Aug 2026
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Keploy is an open-source API test generation and observability platform for developers and QA teams. It records application traffic to generate test cases and mocks, then integrates them into automated testing and CI workflows.
Top 6 Keploy alternatives
Postman is a collaboration platform for API development used by millions of developers.
Free with paid plans available
KushoAI is an AI-assisted API testing platform for developers and QA teams. It generates and runs API tests from specifications or collections,...
Pros
- Generates API tests from existing API definitions and examples
- Uses AI to reduce manual test-authoring work
- Supports automated API validation for development and QA workflows
Cons
- Less established than Postman and SoapUI
- AI-generated tests may require manual review
- Pricing and feature limits are less transparent than open-source alternatives
Bruno is an open-source desktop API client that stores request collections as plain-text files in Git-friendly folders. It is designed for developers...
Pros
- Git-friendly plain-text collections are easier to review and version than ReqBin workspaces
- Works offline without requiring a cloud account
- Supports REST, GraphQL, and request scripting
Cons
- Requires installation while ReqBin runs directly in a browser
- Smaller integration and collaboration ecosystem than Postman
- Team synchronization features are less mature
Free, open source; paid team features available
5
Insomnia is a powerful API client with advanced features for designing and testing APIs.
Pros
- Intuitive interface
- Supports GraphQL and OAuth
Cons
- Less comprehensive API design features compared to StopLight
Free with paid plans starting at $10 per month
6
Hoppscotch
Hoppscotch
Hoppscotch is an open-source, browser-based API development and testing platform. It supports REST, GraphQL, WebSocket, SSE, and socket testing for developers who...
Pros
- Free and open-source, unlike proprietary APISpot alternatives
- Runs in a browser with a fast, low-overhead interface
- Supports several protocols beyond REST, including GraphQL and WebSocket
Cons
- Fewer enterprise governance and collaboration features than APISpot or Postman
- Documentation and monitoring workflows are less comprehensive
- Self-hosting requires operational work for teams that need private deployment
Free; hosted Pro plans available
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