Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
RoboRep - Create conversational chatbots with empathy
Botsify - Ever wonder if you could replace your live chat support system with a chatbot?. Its possible now with Botsify Chatbot For Website.
CSML Playground - Play with CSML, the programming language for chatbots
ManyChat - ManyChat lets you create a Facebook Messenger bot for marketing, sales and support.
ChatBot - Easy to use chatbot platform for business