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

Bruno is a Fast and Git-Friendly Opensource API client, aimed at revolutionizing the status quo represented by Postman, Insomnia and similar tools out there.

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

Gatling is a powerful open-source load testing solution that integrates with your development pipeline. It includes a web recorder and colorful reports.

Unifying API testing, API Performance testing, API Mocks and UI testing.

Render your Android screens without a physical device or emulator.