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.

Voiden is a developer-first API client with local storage, Git-integrated, all based on markdown + offline support.

Requestly is an open-source tool that simplifies API development, testing, mocking, and integration for developers and QAs.

Playwright enables reliable end-to-end testing for modern web apps.

Professional software tool for HTTP testing and debugging