HelpScout - Help Scout is a simple, straightforward way to provide excellent support
Ticketier - Superhuman for customer support tickets
HelpDesk - HelpDesk is a powerful and affordable ticketing system and help desk software for effortless customer support. Get started for free, no credit card required.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
HelpNinja - Simple & Affordable help desk
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.