Meaning of RASA :-RASA. Receive, Appreciate, Summarize, Ask. Business » Management. Rasa is an open source machine learning framework for building AI assistants and chatbots Bascially two part of chat boat 1.Rasa NLU for understanding user messages 2.Rasa Core for holding conversations and deciding what to do next Rasa X is a tool that helps you build, improve, and deploy AI Assistants that are powered by the Rasa framework. Rasa X includes a user interface and a REST API. Rasa X is the latest release from Rasa. Two dependent Componet of RaSa Nlu:- Spacy (You need to install it separately) Tensorflow (By Default available with Rasa) Get more detail used https://rasa.com/docs/rasa/command-line-interface/