Google's service for converting text into natural-sounding spoken audio. Like having a professional voice actor that can read any text in multiple languages and voices.
Navigation apps use Text-to-Speech to provide driving directions in natural-sounding voices.
All four services convert text into spoken audio using neural voices, support SSML for control (rate, pitch, pauses), and provide multiple languages/voices. Differences are mainly in voice catalog, pricing units, regional availability, and integration with each cloud’s AI ecosystem.