Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
Alexa Skill Kit - Effortless Alexa Skill development with AWS Lambda
ChatterOn for Messenger - Build Facebook chat-bots in under 5 minutes
BotTalk - Create Alexa skills and Google Assistant actions with Markup
Octane AI - Octane AI offers tools to create a bot and engage customers and audience via messaging.
OK Google - Explore over 150 Google Now voice commands in one place