Asterisk - An open source telephony switching and private branch exchange service for Linux.
PlayVox - With PlayVox you can run your QA, Coaching, Training and Motivation programs in one place in order to improve CSAT and other relevant KPIs.
FreeSWITCH - FreeSWITCH is an open-source media application designed to support popular protools such as SIP and WebRTC and provides a platform to develop voice and video applications.
Observe.AI - Observe.AI is a top-rated platform that helps you to ensure high-quality call center customer services.
FusionPBX - FusionPBX is an open source FreeSWITCH GUI.
Stella Connect - Stella Connect enables to build deeper customer connections, increase employee motivation and transform the QA and training approach.