Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
SmoochBot - Open source on-boarding bot for conversational apps
Carrd - Simple, responsive one-page site creator.
Hotline - In-app chat,real-time engagement & self-service for your app
mmm.page - Dead simple, drag & drop personal websites
MessageBird Chat API - Connect with your customers through different messaging apps