Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
ManyChat - ManyChat lets you create a Facebook Messenger bot for marketing, sales and support.
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.
Flow XO - Connect your cloud apps together into automated workflows.
Gupshup Flow Bot Builder - Gupshup Flow Bot Builder enables users to build bot messaging flow with a graphical editor.