
Description: Delta Chat is a free and open source email app that allows users to send and receive end-to-end encrypted emails. It uses email standards like SMTP and IMAP to communicate between users on different servers and systems.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: WhatsApp is a popular cross-platform instant messaging and voice over IP service owned by Meta. It allows users to send text messages, voice messages, video calls, images, documents and user location free over an internet data connection.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API