RevTwo - In-app support in under 10 minutes
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Userfeed - Product feedback made for Intercom
Drift - A messaging app that helps you grow your business.
OpsGenie - Alerting and On-Call Management for Dev&Ops Teams
Talkus - Chat with your website users from Slack