
Description: ShareDB is a realtime database backend for building collaborative applications. It allows clients to concurrently edit database documents while maintaining consistency. It synchronizes data between clients automatically and supports rich data types like JSON.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: RxDB is an open-source, reactive database for JavaScript applications. It is indexedDB/WebSQL under the hood but brings a NoSQL interface with queries, schemas, sync and much more to the front-end browser environment.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API