Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
MessageBird Voice API - Add programmatic call capabilities to your app or service
Botsify - Ever wonder if you could replace your live chat support system with a chatbot?. Its possible now with Botsify Chatbot For Website.
MessageBird Chat API - Connect with your customers through different messaging apps
Landbot - An intuitive no-code conversational apps builder that combines the benefits of conversational interface with rich UI elements.
MessageBird API on StdLib - Purchase numbers, send SMS and more with one line of code