
Description: SendGrid is a cloud-based email delivery platform that helps businesses send transactional and marketing emails at scale. It provides reliable email delivery, scalability, analytics, and APIs for integration.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Flute Mail is an open-source email client focused on simplicity and ease of use. It has a clean interface, support for multiple accounts, basic email features like contacts, calendar, and tasks. It is lightweight, customizable, and available on Windows, Mac, and Linux.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API