Amazon Lex is a service for building conversational interfaces into any application using voice and text. It powers the Amazon Alexa virtual assistant.

What is Amazon Lex used for?

You can use Amazon Lex to build chatbots for everyday consumer requests, such as accessing the latest news updates, game scores, or weather. After you build your Amazon Lex bot, you can deploy them on mobile devices, chat services, and IoT devices, with support for rich message formatting.

What is the difference between Lex and Alexa?

Amazon Lex is intended to help build custom conversational interfaces and chat bots for use cases like call centers or application based bots. Bots built with Lex can be highly customized and exist separately from Alexa but they do not take advantage of Alexa's built in capabilities or third party skills.