
Description: Audienceful is a social media campaign management platform that helps brands and agencies plan, execute, and optimize social media campaigns across platforms like Facebook, Instagram, and Twitter. It provides campaign scheduling, audience targeting, performance reporting, and automated bid optimization.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Substack is an email newsletter platform that allows writers and publishers to easily create, design, and distribute email newsletters. It aims to let freelance writers and bloggers build direct relationships with readers.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API