Phonon

Phonon

Gradium
+
+

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About

Kokoro TTS is an efficient text-to-speech tool with multilingual and customizable voice support. Its 182M parameter architecture delivers high-quality audio, supporting languages like American English, British English, French, Korean, Japanese, and Mandarin. It features lifelike voice options, automatic content segmentation, and OpenAI compatibility, facilitating content creation and application integration. With NVIDIA GPU acceleration, it ensures real-time audio generation, making it suitable for various projects.

About

Phonon is an open-weight text-to-speech (TTS) model and inference runtime for developers adding speech generation to applications that need local, offline audio. It converts text into spoken audio and can stream speech as it is generated. The runtime provides Rust and Python interfaces, a Swift package for iOS and macOS, JavaScript for browsers, and Android libraries; it can also run as a self-hosted server with an OpenAI-compatible API. Depending on the model variant, it supports English, French, German, Spanish, and Portuguese. Phonon is intended for developers integrating speech into mobile, desktop, web, embedded, and server applications, including offline or privacy-sensitive use cases. The 31-million-parameter English model weights use the Apache 2.0 license; 40-million-parameter language-specific and multilingual weights use CC BY-NC 4.0. The runtime code is separately available under Apache 2.0 or MIT.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Not Supported
On-Premises Supported
iPhone Supported
iPad Supported
Android Supported
Chromebook Not Supported

Audience

Companies or users that need a cutting-edge AI text to speech solution

Audience

Developers and product teams building mobile, desktop, web, embedded, or server applications that need text-to-speech, including offline or privacy-sensitive use cases.

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

API

Offers API Not Supported

API

Offers API Supported

Screenshots and Videos

No images available

Screenshots and Videos

No images available

Pricing

$0
Free Version Not Supported
Free Trial Supported

Pricing

No information available.
Free Version Supported
Free Trial Not Supported

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 Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Kokoro TTS
Founded: 2024
Singapore
kokorottsai.com

Company Information

Gradium
Founded: 2025
France, United States
gradium.ai/phonon

Alternatives

Fish Audio

Fish Audio

Hanabi AI

Alternatives

Qwen3-TTS

Qwen3-TTS

Alibaba
Piper TTS

Piper TTS

Rhasspy
GPT-Live-1

GPT-Live-1

OpenAI
Simba 3.2

Simba 3.2

Speechify
Qwen3-TTS

Qwen3-TTS

Alibaba
Inkling

Inkling

Thinking Machines Lab

Categories

AI Models Supported
AI Voice Models Supported
Text to Speech Supported

Categories

Integrations

Heard Supported
Hugging Face Not Supported
Oxlo.ai Supported
Vision Agents Supported

Integrations

Heard Not Supported
Hugging Face Supported
Oxlo.ai Not Supported
Vision Agents Not Supported
Claim Kokoro TTS and update features and information
Claim Kokoro TTS and update features and information
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Claim Phonon and update features and information