
Description: SockJS is a JavaScript library that provides a WebSocket-like object in the browser. It automatically falls back to other transports like HTTP long-polling if WebSockets are not available.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: SocketCluster is an open source realtime framework for Node.js that allows for fast and scalable realtime communication between servers and clients. It provides a distributed architecture out of the box to build chat, IoT and other realtime applications.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API