Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
BotList - An app store for bots
Landbot - An intuitive no-code conversational apps builder that combines the benefits of conversational interface with rich UI elements.
Microsoft Bot Framework - Framework to build and connect intelligent bots.
ChatBot - Easy to use chatbot platform for business
Gomix - The easiest way to build the app or bot of your dreams