
Description: Litmus is an email marketing and campaign management platform that helps businesses design, test, and track marketing campaigns. It provides an intuitive drag-and-drop editor to create responsive email templates, A/B testing tools, analytics to optimize campaigns, and integrations with CRM and email providers.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Email on Acid is an email testing and analytics platform that helps ensure emails render correctly across different email clients and devices. It provides comprehensive email testing, debugging, monitoring and analysis.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API