
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: Session is a messaging app that focuses on privacy and security. It offers end-to-end encryption, the ability to delete messages after they are read, and does not store user data on servers.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API