Cartesia

Cartesia focuses on real-time voice AI. Its Sonic family of streaming text-to-speech models is known for low latency and natural, expressive voices, supporting 40+ languages, emotional cues like laughter, and voice cloning, delivered mainly via API for AI customer service, voice agents, games, and interactive apps. For developers and product teams that need real-time voice.

• Ultra-low-latency TTS
• 40+ languages
• Voice cloning and emotion