Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors
Sonar - 2-way chat with your customers over SMS and FB Messenger
ThroughMessage - Uncomplicated customer chat for ecommerce websites
Video Live Chat for Websites - Provide real-time video chat support with screen sharing
Sendblue - Programmatically send iMessage and SMS