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

Selenium automates browsers. That's it! What you do with that power is entirely up to you.

Jest is a delightful JavaScript Testing Framework with a focus on simplicity.

Mockoon is the easiest and quickest way to design and run mock REST APIs.

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

RapidAPI for Mac is a full-featured HTTP client that lets you test and describe the APIs you build or consume. It has a beautiful native macOS interface to compose requests, inspect server responses, generate client code and export API definitions.