avaamo - Simple, Secure Business Messaging
BambooHR - Personalized HR software for SMBs
Facebook Messenger - Facebook Messenger is a faster way to message.
CharlieHR - Charlie automates many of the administrative headaches you'll experience when scaling a company, so you can spend less time doing admin and more time doing the things you love.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Namely - Namely is the end-to-end HR, payroll, and benefits platform for growing companies.