The fastest, ultra-realistic generative voice API.
Powered by our next-gen state space model.
Purpose-built for developers.
Sonic
Powered by our next-gen state space model.
Purpose-built for developers.
With a time-to-first-audio of 95ms, Sonic is the fastest generative voice model—with best in class quality and controllability.
Built for streaming using our first-of-its-kind low latency state space model inference stack.
Fine-grained control over pitch, speed, emotion, and pronunciation.
And scale up to hours of speaker data for exact-fidelity voice cloning.
Source Audio
Clone
Make your content accessible to a global audience with Sonic Multilingual.
Power support experiences that make customers happy.
Bring your storytelling to life with immersive voices.
Create content that engages viewers and drives clicks.
Narrate content for podcasts, news, and publishing.
Empower care with voices that patients trust.
Scale sales with lifelike voices that lead to conversions.
Build responsive AI voice agents for any use case.
Go global with localized voices and accents.
Make AI avatars talk for any use case.
Automate logistics with voice-enabled systems.
Screen candidates with AI-powered voice interviews.
Make your content accessible to everyone.
Sonic for Support
95ms time to first audio across every language
Engage customers naturally like a human
Unlimited concurrency for traffic peaks
Get phone numbers and payment info right
Join the growing list of companies opting for Sonic.
Cartesia ships features quicker than any team I know. And their voices work—one of our healthcare customers reported that their patients were 4x more likely to stay on a call after switching to Cartesia’s voices compared to their previous text-to-speech provider.
Nikhil Gupta, CTO
Cartesia hit the mark perfectly. Their voices are incredibly expressive, and you can customize them to your heart's content. The emphasis on low latency makes them the perfect partner for real-time, interactive content. It’s a game-changer for our creators.
Michael Lingelbach, CEO
Voice quality and low latency generation are critical for our agents, which serve small businesses. Cartesia has set the new industry standard for voice. It's remarkable what they have delivered and the velocity of improvements.
Bob Summers, CEO