
Description: SlimerJS is a scriptable browser for web scraping and testing, similar to PhantomJS, based on Gecko and Firefox. It provides a JavaScript API for controlling a browser to load pages, extract content, run tests, take screenshots, etc.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: PhantomJS is an open-source headless web browser scriptable with JavaScript. It is used for automating web page interactions, testing, web scraping, and capturing website screenshots. PhantomJS implements web standards and runs the latest web technologies without requiring a visual browser.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API