
Description: GPGMail is an open-source email encryption plugin for Thunderbird and Seamonkey. It integrates OpenPGP encryption into the email client, allowing users to easily encrypt, decrypt, sign and verify emails and attachments.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Walnut Secure Email is an end-to-end encrypted email service that focuses on privacy and security. It offers features like encrypted storage, encrypted sending, zero access encryption, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API