What are some alternatives?
When comparing Microsoft Bot Framework and ManyChat, you can also consider the following products
Botpress - Open-source platform to create, manage and extend bots
Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
Dialogflow - Conversational UX Platform. (ex API.ai)
Landbot - An intuitive, codeless platform that helps you build frictionless conversational interfaces for better CX and more effective lead gen.
Amazon Lex - Harness the power behind Amazon Alexa for your own conversational apps.
Tars - TARS enables users to create chatbots that replaces regular old webforms.