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
Carrd - Simple, responsive one-page site creator.
Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors
Message.io - Make your chat bots cross-platform
Actions from Slack - Turn Slack messages into tickets, issues, tasks, and more.