
Description: CallzApp is a cloud-based call center and phone system designed for small businesses. It includes features like call routing, IVR menus, call recording, call analytics, and more. Can be used as a full-featured call center or simply to route calls to mobiles and landlines.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Blacktel.io is a cloud-based business phone system designed for small and medium businesses. It provides a range of features like auto attendants, call routing, voicemail transcriptions, and integrations with popular business apps.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API