avaamo - Simple, Secure Business Messaging
Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
SupportKit - Embed Zendesk support into your iOS app with 1 line of code
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Fleep for Business - Simple, open collaboration and chat with admin capabilities
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.