Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Outbound Apps by Intercom - Embed apps right inside your messages
Drift - A messaging app that helps you grow your business.
Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors
Talkus - Chat with your website users from Slack
Actions from Slack - Turn Slack messages into tickets, issues, tasks, and more.