
Description: OpenMailBox is an open source email service that emphasizes privacy and security. It offers end-to-end encryption, anonymous registration, and doesn't collect personal data. As it's self-hosted, you have full control over your data.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Gmail is a free email service provided by Google. It offers great spam filtering, 15GB of storage, support for email labeling, automatic sorting, integrated chat, and robust search capabilities.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API