HelpCrunch Knowledge Base - Deliver instant answers to customers 24/7 with help articles
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
Slab - Slab is a knowledge hub for the modern workplace. We help teams unlock their full potential through shared learning and documentation. Slab features a beautiful editor, blazing fast search, and dozens of integrations like Slack, GitHub, and G Suite.
Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
DuoCircle - DuoCircle provides enterprise spam filtering and email management solutions.