Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
Botsify - Ever wonder if you could replace your live chat support system with a chatbot?. Its possible now with Botsify Chatbot For Website.
ChatBot - Easy to use chatbot platform for business
Landbot - An intuitive no-code conversational apps builder that combines the benefits of conversational interface with rich UI elements.
BotList - An app store for bots
ManyChat - ManyChat lets you create a Facebook Messenger bot for marketing, sales and support.