
Description: Skiff Mail is an end-to-end encrypted email service that focuses on privacy and security. It allows users to send and receive encrypted emails that can only be read by the intended recipient.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Tuta is an open source, privacy-focused email service that emphasizes security and anonymity. It offers end-to-end encryption, anonymous sign up without a phone number, and servers located in privacy-friendly jurisdictions.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API