Karate Labs
Test Automation Frameworks
Open source API testing framework combining test automation with API mocks and performance.
Rest API testingGraphql API testingAsync protocol testing
Alternatives to Keploy
- 1API Testing Tools, Test Automation Frameworks
- 2API Testing Tools
HTTP Toolkit
API Testing Tools
Open source tool for debugging, testing, and building with HTTP and HTTPS traffic interception.
Http traffic interceptionRequest and response inspectionTraffic filtering and searchPrice$10+ / month
- 3API Testing Tools
Hoppscotch
API Testing Tools
Hoppscotch is an open-source API development platform providing a fast, lightweight alternative to Postman for testing REST, GraphQL, WebSocket, and MQTT APIs.
Graphql API testing with query builder and schema explorerMcp server integration for AI agent accessPrice$6 / user / month
- 4API Testing Tools, Test Automation Frameworks
SoapUI
API Testing Tools
Open source API testing tool by SmartBear supporting REST, SOAP, and GraphQL with assertion-based validation.
Rest API testingSoap and wsdl testingSecurity testing - 5API Testing Tools, Test Automation Frameworks
REST-assured
API Testing Tools
Java library for testing and validating REST services with a domain-specific language for writing readable API tests.
Free planTest Automation FrameworksIndividual Contributor / Professional - 6API Testing Tools, Test Automation Frameworks
Schemathesis
API Testing Platforms
Property-based API testing tool that automatically generates test cases from OpenAPI and GraphQL specifications.
Free planDynamic Application Security TestingTest Automation Frameworks - 7API Testing Tools
mitmproxy
API Testing Tools
Open source interactive HTTPS proxy for intercepting, inspecting, modifying, and replaying web traffic for debugging.
Request and response modificationWeb interface with devtools like experience - 8API Testing Tools
Wiretap
API Testing Tools
Open-source OpenAPI-aware HTTP proxy for validating API requests and responses against schemas in real time.
API mocking and mock response generationRequest and response inspectionOpenapi and asyncapi support - 9API Testing Tools, Test Automation Frameworks
Pact
Contract Testing
Open source contract testing framework ensuring microservices communicate correctly by verifying API interactions between consumers and providers.
Consumer driven contract testingMulti language supportPact broker for contract management - 10API Testing Tools
Dredd
API Testing Tools
Language-agnostic HTTP API testing tool that validates API documentation against its backend implementation.
Free planAPI DocumentationAPI Reference Documentation
