
Description: Firefox Relay is a free service from Mozilla that provides users with alias email addresses to protect their privacy and reduce spam. Users can generate unlimited email aliases that forward messages to their real inbox.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: 33Mail is a free, ad-supported email service that emphasizes privacy and security. It offers encrypted email transmission, spam filtering, email aliases to mask your real email address, and 2GB of email storage.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API