Front App - multi-channel inbox service for collaborative teams
Guidde - A quick, context-based customer support widget
HelpScout - Help Scout is a simple, straightforward way to provide excellent support
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
ZenDesk - Zendesk is a beautiful, lightweight help-desk solution.
OmniChat by Freshchat - Engage, sell, and support from anywhere