
Description: RESTtest is an open-source API testing tool that allows developers to easily test REST APIs. It provides a simple interface to send HTTP requests and view responses, has support for variables, assertions, authentication, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Advanced REST Client is an open-source API testing tool for developers. It allows making HTTP requests, inspecting responses, and testing REST and SOAP web services. It can export environments, save history, and authenticate requests.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API