What are some alternatives?
When comparing Tars and Microsoft Bot Framework, you can also consider the following products
Chatfuel - Chatfuel is the best bot platform for creating an AI chatbot on Facebook.
Botpress - Open-source platform to create, manage and extend bots
ManyChat - ManyChat lets you create a Facebook Messenger bot for marketing, sales and support.
Dialogflow - Conversational UX Platform. (ex API.ai)
IBM Watson Assistant - Watson Assistant is an AI assistant for business.
Amazon Lex - Harness the power behind Amazon Alexa for your own conversational apps.