Cartesia Sonic-3.6Cartesia
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Inworld TTSInworld
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Related Products
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About
Sonic is a real-time text-to-speech model built for voice agents, combining natural delivery, sub-90ms latency, and native support for more than 40 languages. It is designed to make voice interactions feel effortless, with tone that adjusts to context, consistent pacing, and speech that follows the natural rhythm of conversation. By default, Sonic interprets the emotional subtext of a transcript and calibrates delivery automatically, while non-verbal expressions such as laughter can be inserted directly into the text. The model follows transcripts faithfully, produces clean audio across languages and voices, and handles alphanumeric content such as order numbers, phone numbers, IDs, and email addresses naturally without preprocessing. Context-aware pronunciation helps heteronyms sound correct from surrounding words, while custom pronunciation dictionaries let teams define how proper nouns and domain-specific terms should be spoken.
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About
Inworld TTS is a state-of-the-art text-to-speech platform designed to deliver ultra-realistic, context-aware speech synthesis and precise voice-cloning capabilities at a radically accessible price. The flagship model, TTS-1, is optimized for real-time applications and supports low-latency streaming (first audio chunk in ≈200 ms) as well as multiple languages (including English, Spanish, French, Korean, Chinese, and more). Developers can use instant zero-shot voice cloning (5-15 seconds of audio) or professional fine-tuned cloning, add voice-tags for emotion, style, and non-verbal sounds, and switch languages while preserving voice identity. The larger TTS-1-Max model (in preview) offers even more expressive speech and multilingual strength. The platform supports both API and portal access, streaming or batch mode, and is designed for everything from interactive voice agents and gaming characters to branded audio experiences.
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
|
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Audience
Developers, product teams, and enterprises seeking to build fast, natural, multilingual voice agents and text-to-speech experiences for customer-facing and business workflows
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Audience
Developers and businesses looking for a tool offering multilingual voice synthesis and custom-voice cloning at scale
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Support
Phone Support
24/7 Live Support
Online
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Support
Phone Support
24/7 Live Support
Online
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API
Offers API
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API
Offers API
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
$5 per month
Free Version
Free Trial
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Pricing
$0.005 per minute
Free Version
Free Trial
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Reviews/
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Reviews/
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Training
Documentation
Webinars
Live Online
In Person
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Training
Documentation
Webinars
Live Online
In Person
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Company InformationCartesia
Founded: 2023
United States
www.cartesia.ai/sonic
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Company InformationInworld
Founded: 2021
United States
inworld.ai/tts
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Categories |
Categories |
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Integrations
Claude
Fireworks AI
Google AI Overviews
Groq
Inworld
LiveKit
Mistral AI
OpenAI
Tenstorrent DevCloud
Vapi AI
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Integrations
Claude
Fireworks AI
Google AI Overviews
Groq
Inworld
LiveKit
Mistral AI
OpenAI
Tenstorrent DevCloud
Vapi AI
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