The fastest, ultra-realistic generative voice API
The fastest, ultra-
realistic generative voice API
Our flagship State Space Model for seamless, ultra-realistic AI voices.
Blazingly fast
Blazingly fast
Blazingly fast
With a Time-to-First-Audio of 40ms, Sonic is the fastest generative voice model built for streaming.
With a Time-to-First-Audio of 40ms, Sonic is the fastest generative voice model built for streaming.
SONIC
40MS
NEXT BEST COMPETITOR
130ms
Top-tier quality
Top-tier quality
Top-tier quality
Sonic consistently achieves the highest rankings among all tested models by independent evaluators.
Sonic consistently achieves the highest rankings among all tested models by independent evaluators.
SONIC
Fully Controllable
Control the speed and pronunciation of generated speech to create richer, more compelling voice experiences.
Speed
Positivity
Anger
Curiosity
Sadness
Surprise
Speak every language
Sonic supports native speech in 15 languages. Localize a given voice to any accent or language.
English
American
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English
American
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English
American
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Spanish
Latin
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Spanish
Latin
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Spanish
Latin
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French
Standard
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French
Standard
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French
Standard
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Portuguese
Brazilian
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Portuguese
Brazilian
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Portuguese
Brazilian
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Hindi
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Hindi
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Hindi
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Chinese
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Chinese
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Chinese
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Russian
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Russian
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Russian
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Dutch
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Dutch
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Dutch
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Japanese
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Japanese
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Japanese
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Turkish
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Turkish
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Turkish
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Korean
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Korean
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Korean
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German
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German
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German
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Swedish
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Swedish
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Swedish
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Italian
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Italian
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Italian
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Polish
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Polish
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Polish
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Coming soon...
Lifelike, expressive voices for every use case.
Leverage AI voice cloning for high-fidelity, realistic voice replication with unmatched accuracy.
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Gaming
Bring your storytelling to life with immersive voices
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Gaming
Bring your storytelling to life with immersive voices
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Gaming
Bring your storytelling to life with immersive voices
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Media
Narrate content for podcasts, news, and publishing.
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Media
Narrate content for podcasts, news, and publishing.
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Media
Narrate content for podcasts, news, and publishing.
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Support
Power support experiences that delight your customers.
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Support
Power support experiences that delight your customers.
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Support
Power support experiences that delight your customers.
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Content
Create content that engages viewers and drives clicks.
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Content
Create content that engages viewers and drives clicks.
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Content
Create content that engages viewers and drives clicks.
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Healthcare
Empower healthcare with voices that patients trust.
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Healthcare
Empower healthcare with voices that patients trust.
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Healthcare
Empower healthcare with voices that patients trust.
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Sales
Scale sales with lifelike voices that lead to conversions.
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Sales
Scale sales with lifelike voices that lead to conversions.
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Sales
Scale sales with lifelike voices that lead to conversions.
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Voice Agents
Build responsive AI voice agents for any use case.
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Voice Agents
Build responsive AI voice agents for any use case.
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Voice Agents
Build responsive AI voice agents for any use case.
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Dubbing
Go global with localized voices and accents for every language.
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Dubbing
Go global with localized voices and accents for every language.
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Dubbing
Go global with localized voices and accents for every language.
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Avatars
Create expressive, relatable AI avatars for any use case.
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Avatars
Create expressive, relatable AI avatars for any use case.
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Avatars
Create expressive, relatable AI avatars for any use case.
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Logistics
Automate complex logistics with voice-enabled systems.
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Logistics
Automate complex logistics with voice-enabled systems.
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Logistics
Automate complex logistics with voice-enabled systems.
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Recruiting
Screen candidates with AI-powered voice interviews.
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Recruiting
Screen candidates with AI-powered voice interviews.
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Recruiting
Screen candidates with AI-powered voice interviews.
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Accessibility
Make your content accessible to anyone, anywhere.
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Accessibility
Make your content accessible to anyone, anywhere.
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Accessibility
Make your content accessible to anyone, anywhere.
Meet the teams we empower
Bob Summers
CEO
“Sonic is the only product in existence with model latency of less than 100 ms, outperforming its next best alternative by a factor of four.”
Read the full story
Kwindla Hultman
CEO
“Cartesia Sonic is the best voice model today for real-time multimodal use cases.”
Read the full story
Spencer Chan
Head of Poe Product
“With Cartesia's Sonic model, users can interact with a wide range of high-quality, human-like voices in multiple languages, enhancing their experience on our platform.”
Read the full story
Meet the teams we empower
Bob Summers
CEO
“Sonic is the only product in existence with model latency of less than 100 ms, outperforming its next best alternative by a factor of four.”
Read the full story
Kwindla Hultman
CEO
“Cartesia Sonic is the best voice model today for real-time multimodal use cases.”
Read the full story
Spencer Chan
Head of Poe Product
“With Cartesia's Sonic model, users can interact with a wide range of high-quality, human-like voices in multiple languages, enhancing their experience on our platform.”
Read the full story
Meet the teams we empower
Jon Doe
CEO
“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.”
Bob Summers
CEO
“Sonic is the only product in existence with model latency of less than 100 ms, outperforming its next best alternative by a factor of four.”
Kwindla Hultman
CEO
“Cartesia Sonic is the best voice model today for real-time multimodal use cases.”