
Description: Mailgun is an email service built for developers. It provides a powerful API that allows sending, receiving, and tracking emails easily from within an application. Key features are flexible APIs, scalable infrastructure, and deliverability optimization.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: AltosMail is an open-source email service focused on security and privacy for personal and business users. It is self-hosted with custom domains and encrypted data storage. AltosMail offers inbox organization tools, email aliases, automatic encryption, and other features. It's designed for easy installation and use.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API