Amazon’s AI service for building conversational interfaces is Amazon Lex.
Amazon Lex is an Amazon Web Services product that lets developers create conversational interfaces using voice and text. It provides technologies for automatic speech recognition and natural-language understanding, allowing software to interpret spoken or typed requests and respond through a chatbot or voice application. The service is especially suited to task-oriented conversations, such as checking information, booking services, or managing customer-support interactions.
Amazon introduced Lex through AWS and made it broadly available to customers in 2017. Its technology is closely related to the conversational capabilities behind Alexa, but Lex is a developer service for building custom applications; Alexa is Amazon’s consumer-facing voice assistant and broader device ecosystem.
The wrong options are other Amazon AI services. Amazon Comprehend analyzes text, Amazon Rekognition analyzes images and video, and Amazon Polly converts text into natural-sounding speech. These services can complement a conversational system, but Lex is the Amazon service specifically associated with building conversational interfaces and chatbots.