
Description: Polymer is an open-source JavaScript library for building web applications using Web Components. It allows developers to create custom, reusable HTML elements with encapsulated functionality and styles.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: StencilJS is an open-source toolkit for building reusable, standalone Web Components using TypeScript. It focuses on creating smaller, faster components that work natively in modern browsers without needing large frameworks or runtimes. Stencil components work with popular frameworks like React, Angular, and Vue.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API