
Description: SparkPost is an email delivery service that focuses on delivering high volumes of email easily and reliably. It provides email infrastructure and services to help companies optimize their email programs.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Mailgun is an email service built for developers. It provides a powerful API that allows sending, receiving, and tracking emails easily from within an application. Key features are flexible APIs, scalable infrastructure, and deliverability optimization.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API