
Description: Groupmail is an email marketing software that allows users to create and send email newsletters to subscriber lists. It has simple drag-and-drop email design templates, A/B testing capabilities, and campaign analytics features.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Marble is a drag-and-drop email design software that allows anyone to easily create beautiful, responsive email templates without coding. It has an intuitive, user-friendly interface for quickly building and testing emails with custom web fonts and flawless rendering.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API