AWS text-to-speech service that turns written text into lifelike spoken audio. Like having a professional narrator that can read any text in different voices.
Educational apps use Polly to read textbook content aloud to students with visual impairments or learning disabilities.
All four services convert text into spoken audio using neural voices. They typically support SSML for pronunciation and speaking style control, multiple languages/voices, and APIs/SDKs for app integration. Differences are mainly in available voices/languages, pricing units, and ecosystem integrations.