k6 Open Source is designed for load testing. Extensible to support other types of testing.

Cloud-scale performance testing. Effortless load testing and synthetic checks at scale. Cloud-native and open-source. The next evolution of performance testing.

Built for developers and testers alike, SoapUI is the only open source tool that covers the entire testing spectrum (functional, security, load, mocking).

Free & OpenSource REST API Testing Tool for all levels in a Test Pyramid

Hoppscotch is an open-source API development ecosystem that helps you create and test your API requests saving precious time in development.

The world’s first API testing platform that auto-generates unit test cases with dependency mocks from API calls. Using advanced AI, it simplifies test creation, debugging, and evolution, ensuring comprehensive coverage and boosting software quality.