
Description: ProtonMail Bridge is an email client that connects your ProtonMail encrypted email account to your desktop email client like Outlook or Thunderbird. It allows you to use ProtonMail seamlessly with your preferred email program while maintaining encryption.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Enigmail is an extension for the Thunderbird email client that provides easy-to-use end-to-end encryption. It uses OpenPGP standards to encrypt, decrypt, sign and verify email communications.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API