
Description: Citrus is an open source automated testing framework for Integration testing. It simplifies writing tests for REST APIs, websockets, messaging protocols like JMS or AMQP, and many more. Citrus allows creating reusable test components and has built-in support for validating JSON and XML.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Selenium is an open-source automated testing framework used to test web applications across different browsers and platforms. It can be used to automate tasks like testing user interfaces, validating functionality, performance testing, etc.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API