
Description: Testling is an online test runner that allows you to easily run JavaScript unit tests in multiple browsers. It integrates with popular JavaScript unit testing frameworks like QUnit, Mocha and Jasmine.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: BrowserStack is a cross-browser testing tool that allows you to test your website or app across various browsers and devices. It provides an online testing environment and a large range of browsers and operating systems.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API