Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Slack with your Users - Speak to your app's users entirely within Slack
SmoochBot - Open source on-boarding bot for conversational apps
Conversity - Easiest way to manage Facebook Messenger chats
Hotline - In-app chat,real-time engagement & self-service for your app
VECA - Your eCommerce assistant