Inworld TTS

Inworld TTS

Inworld
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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.

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.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

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

Audience

Developers and businesses looking for a tool offering multilingual voice synthesis and custom-voice cloning at scale

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

$5 per month
Free Version
Free Trial

Pricing

$0.005 per minute
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Cartesia
Founded: 2023
United States
www.cartesia.ai/sonic

Company Information

Inworld
Founded: 2021
United States
inworld.ai/tts

Alternatives

Alternatives

Qwen3-TTS

Qwen3-TTS

Alibaba
Chirp 3

Chirp 3

Google
Voxtral TTS

Voxtral TTS

Mistral AI
Fish Audio

Fish Audio

Hanabi AI

Categories

Categories

Integrations

Claude
Fireworks AI
Google AI Overviews
Groq
Inworld
LiveKit
Mistral AI
OpenAI
Tenstorrent DevCloud
Vapi AI
gpt-oss-20b

Integrations

Claude
Fireworks AI
Google AI Overviews
Groq
Inworld
LiveKit
Mistral AI
OpenAI
Tenstorrent DevCloud
Vapi AI
gpt-oss-20b
Claim Cartesia Sonic-3.6 and update features and information
Claim Cartesia Sonic-3.6 and update features and information
Claim Inworld TTS and update features and information
Claim Inworld TTS and update features and information