Meet Slack - Generate instant Google Meets by using /meet from any Slack channel, group or DM. Metings open with the correct Google Account and you Slack status updates to 'On a call' automatically.
Daily.co for Intercom - Free video calls & screen shares embedded in Intercom
Slack - A messaging app for teams who see through the Earth!
Pluot Communications - Big-screen video conferencing for startups
Calls on Slack - Make voice calls in Slack
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.