Cartesia - Real-time TTS API with AI laughter and emotion
Integrate real-time text-to-speech with natural, expressive voices in 44 languages.
Experience Natural Speech
You can generate natural, expressive voices with Cartesia's Sonic-3.6 model, which is ranked #1 for naturalness. It offers sub-90ms latency and is natively multilingual across 44 languages for your applications.
Built For Voice Agents
Sonic provides seven capabilities that voice agents rely on, including naturalness, reliability, speed, scalability, multilingual support, consistency, and cost-effectiveness. These features help you create production-ready voice layers.
Customize Your Voice Output
You can clone any voice and localize it into 44 languages, fine-tuning every word for your specific needs. Sonic automatically interprets emotional subtext and allows you to insert non-verbal expressions like laughter.
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