
Description: PingPal Messenger is a free instant messaging and video chat app. It allows users to connect with friends and family for real-time conversations and video calls. The app has features including group chats, media sharing, customizable profiles, and end-to-end encryption.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Signal is a free, open source, encrypted messaging and voice calling app. It offers end-to-end encryption for secure communication. With Signal, users can send encrypted messages, make voice and video calls, and share media with individuals or groups.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API