Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
Front - multi-channel inbox service for collaborative teams
Init.ai - Init.ai is the simplest way to build, train, and deploy intelligent conversational apps
Salesforce Service Cloud - Service Cloud integrates customer service with social networks and provides a self-service customer portal and knowledge base system.
Landbot - An intuitive no-code conversational apps builder that combines the benefits of conversational interface with rich UI elements.