Cartesia

About Cartesia

Cartesia offers real-time streaming text-to-speech technology with expressive, emotion-ready voices, including laughter, across 40+ languages. Its Sonic-3 API is designed for AI agents and interactive apps, delivering ultra-low-latency TTS with natural prosody and context-savvy accuracy. The solution is deployed for enterprise-grade use, with experiences cited from regions worldwide from San Francisco to Tokyo, and includes capabilities like voice cloning and curated voice libraries for diverse personas.