
Description: Mailtrain is an open source newsletter application that allows you to easily create, send, and manage email newsletters. It has a simple and intuitive interface that makes it easy for anyone to get started with email marketing campaigns.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Shiftmail is an email service that focuses on privacy and security. It offers end-to-end encryption, anonymity, self-destructing messages, and more to protect user data and communications.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API