Asterisk - An open source telephony switching and private branch exchange service for Linux.
Totango - Totango is a Customer Success Software Platform
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.
Churnzero - ChurnZero is the Customer Success Platform built for growing SaaS and subscription businesses.
freepbx - FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).
Planhat - Customer success has changed. Meet the modern Customer Platform!