
Description: Postler is an open-source desktop email client for Windows, Mac, and Linux. It has support for multiple accounts and email providers like Gmail, Outlook, Yahoo Mail, and iCloud. Key features include customizable themes, powerful search tools, email scheduling, read receipts, and offline access.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Mozilla Thunderbird is a free and open-source email client and personal information manager developed by the Mozilla Foundation. Known for its flexibility, Thunderbird provides email, chat, and news client functionalities. It supports a variety of email protocols, offers customization through add-ons, and focuses on user privacy.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API