
Description: Voxer is a walkie talkie app that works over cellular data or WiFi. It allows real-time voice communication, as well as the ability to send pre-recorded audio messages. Key features include end-to-end encryption, group messaging with up to 200 people, and integration with other apps like Zello and JioChat.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Telegram is a cloud-based instant messaging and voice over IP service. It offers end-to-end encrypted video calling, file sharing, and several other features. Telegram clients exist for both mobile and desktop systems.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API