Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
Conversity - Easiest way to manage Facebook Messenger chats
ChatterOn for Messenger - Build Facebook chat-bots in under 5 minutes
Slack with your Users - Speak to your app's users entirely within Slack
VECA - Your eCommerce assistant
Octane AI - Octane AI offers tools to create a bot and engage customers and audience via messaging.