
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: SimpleX Chat is a free, open source instant messaging application allowing users to message, voice and video chat securely without disclosing their personal phone numbers. SimpleX is an alternative for messaging apps like WhatsApp, Telegram, Viber, Skype, Facebook messenger, etc. SimpleX aims to set a new standard for privacy and security.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API