
Description: Lemon Group Messenger is a free and open-source instant messaging app for groups. It allows users to chat in groups up to 500 people, make voice and video calls, share photos, audio, video and other files securely. It works across platforms like Windows, Mac, Linux, Android and iOS.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Telegram is a cloud-based instant messaging and voice over IP service. It offers end-to-end encrypted video calling, file sharing, and several other features. Telegram clients exist for both mobile and desktop systems.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API