Rasa Core - Rasa Core is a well-designed dialogue engine used to create chatbots.
Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
AWS Lambda + Motion AI - Build bots using Node.js, in your browser!
Botsify - Ever wonder if you could replace your live chat support system with a chatbot?. Its possible now with Botsify Chatbot For Website.
marbot - A Slack bot detecting and managing incidents on AWS.
Landbot - An intuitive no-code conversational apps builder that combines the benefits of conversational interface with rich UI elements.