Yac - Take your time back from Zoom & Slack
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
LinkedIn Voice Messaging - Communicate when you want, how you want
GoSquared Live Chat - Beautiful, simple, and free live chat for your website
Slack - A messaging app for teams who see through the Earth!
Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors