The process of building, testing and deploying chatbots can be done on cloud-based chatbot development platforms offered by cloud Platform as a Service (PaaS) providers such as Oracle Cloud Platform  and IBM Watson. These cloud platforms provide Natural Language Processing, Artificial Intelligence and Mobile Backend as a Service for chatbot development.
This is where most applications of NLP struggle, and not just chatbots. Any system or application that relies upon a machine’s ability to parse human speech is likely to struggle with the complexities inherent in elements of speech such as metaphors and similes. Despite these considerable limitations, chatbots are becoming increasingly sophisticated, responsive, and more “natural.”
Messenger bots might also be able to revolutionize customer support. Facebook has become a popular platform for brands to interact with their customers. Many times customers will take a complaint to a brand’s Facebook page and have it resolved over chat. A Messenger bot makes it easier for you to get help. The quality of the support will vary but for smaller business that rely on Facebook for sales a bot is going to help them stay ‘online’ 24/7.