
Description: Microsoft Mail and Calendar is a free email and calendar service developed by Microsoft. It comes included with Windows 10 and integrates well with other Microsoft products and services.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Pantheon Mail is an open-source, privacy-focused email service. It features end-to-end encryption, zero-knowledge architecture, anonymous registration, and secure storage.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API