
Description: Zadarma is a cloud-based phone system and virtual PBX service that allows businesses to set up a professional phone system in the cloud. It provides VOIP calling, call routing, IVR menus, call recording, and other features without the need for on-premise hardware.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Grasshopper Virtual Phone is a cloud-based phone system for small businesses. It works with your existing phones and lets you use a virtual phone number to receive calls, access features like auto attendants, call routing, voicemail transcriptions, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API