Comprehend

Amazon Comprehend is a fully managed NLP service that analyzes unstructured text to detect sentiment, extract named entities (people, places, organizations), identify key phrases, determine the dominant language, and classify documents into custom categories — all without ML expertise. It is API-driven, so adding language understanding to pipelines processing reviews or support tickets requires no model training. The key exam distinction is Comprehend versus Comprehend Medical: the base service handles general-purpose text, while Comprehend Medical extracts clinical entities — conditions, medications, dosages, and protected health information — from medical notes. Match the service to the text domain.