HelpScout - Help Scout is a simple, straightforward way to provide excellent support
Talkus - Chat with your website users from Slack
Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Helpy.io - Helpy is a tightly integrated customer support platform that combines ticketing, knowledge base, community and AI support chat.
Aircall's Zendesk App - The best phone companion for Zendesk