Rasa Open Source is an open source machine learning framework for natural language understanding and dialogue management. It enables developers to create sophisticated conversational AI applications that can understand user input, respond to inquiries, and guide users through complex conversations. With Rasa Open Source, developers can quickly build sophisticated chatbots and virtual assistants that can interact with users in natural language, allowing them to provide a better and more personalized user experience. The platform also offers powerful tools such as an NLU engine, dialogue manager, and interactive learning module for training and deploying AI applications. Additionally, Rasa Open Source provides an intuitive and easy-to-use interface, allowing developers of any skill level to get up and running quickly. With Rasa Open Source, developers can create sophisticated conversational AI applications that understand user input and provide a more engaging and interactive user experience.