Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Sonar - 2-way chat with your customers over SMS and FB Messenger
Carrd - Simple, responsive one-page site creator.
ThroughMessage - Uncomplicated customer chat for ecommerce websites
mmm.page - Dead simple, drag & drop personal websites
Sendblue - Programmatically send iMessage and SMS