freepbx - FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).
Interakt - Easily interact with every user of your app. Setup Your User Interaction Headquarter Today!
Asterisk - An open source telephony switching and private branch exchange service for Linux.
WATI - No-code chatbot builder for WhatsApp Business
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.
Apple Business Chat - New way for businesses to connect with customers directly