
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: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: CasperJS is an open source web testing and automation tool written in JavaScript that uses headless browsing powered by PhantomJS and provides a high-level API for scripting browser interactions and assertions.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API