
Description: Postale.io is an easy-to-use email testing and analytics platform that allows you to test and optimize emails before sending them out. It provides detailed analytics on opens, clicks, rendering, spam testing, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Zoho Mail is a free, ad-supported email service that provides enterprise-level features for individuals and businesses. It offers unlimited storage, POP and IMAP access, mail forwarding, shared calendars, docs and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API