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.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
BetterChat for WhatsApp - Gorgeous new full-featured WhatsApp client for the Mac.
Chatlio - When you have a business to run, your average instant messaging software just will not do. You need an internal presence upon which your entire team can collaborate on. Read more about Chatlio.
RELE.AI - RELE.AI is the first enterprise Virtual Bot Assistant, allowing you to document client conversations and interact with your CRM without ever leaving WhatsApp (desktop & mobile).
Avochato - Text messaging for your business.