Text to speech

StyleTTS 2

A lightweight English speech synthesis model with natural intonation. Many other models, such as Kokoro, are built on it.

The last open version came out in Nov 2023. The family has not been updated for a long time: the model still works, but do not expect fixes or new sizes.

Developer
Columbia University, USA
First release
Nov 2023
Latest release
Nov 2023
Sizes
about 150M
License
Commercial use with conditionsCode MIT; the pretrained weights require telling listeners that the voice is synthesized
Russian
Not supported
Running
On your own serverAlso runs without a GPU
Industries
Media and production, Software development, Education
Deploy on your server Hugging Face GitHub

What it does

  • Voicing texts in English
  • A base for fine-tuning your own voice
  • Voice service prototypes

Where it is used

Product developmentEducationMedia

Hardware requirements

LaptopLaptop or regular PC, up to 8 GB of VRAM — smaller versions
fits
1 GPUOne GPU with 16–80 GB — mid-size versions
no versions
ClusterServer with several GPUs — flagship versions
no versions

Versions

  1. StyleTTS 2 (LJSpeech, LibriTTS)

How to run it

On your own serverWeights are downloaded from Hugging Face and served with vLLM (load and API) or llama.cpp (modest hardware). The model then runs in a closed network with no per-request fees.Hugging Face
How much hardware you needCalculate the VRAM for the model size, context length and number of concurrent requests.Open the hardware calculator

I can set this up end to end: pick the model size, deploy it on your server and connect it to your systems.

Frequently asked questions

Can StyleTTS 2 be used in a commercial project?

With conditions. License: Code MIT; the pretrained weights require telling listeners that the voice is synthesized. Restrictions vary — region, company revenue, attribution requirements. Have a lawyer check the terms before a commercial launch.

What hardware does StyleTTS 2 need?

At minimum: Laptop or regular PC, up to 8 GB of VRAM — smaller versions. Some versions also run on an ordinary CPU, without a GPU. You can calculate the exact VRAM for your model size and context in the hardware calculator.

Does StyleTTS 2 support Russian?

No. The model card lists its languages and Russian is not among them.

Where can I download StyleTTS 2 and what does it cost?

The StyleTTS 2 weights are open and free to download. You only pay for the hardware it runs on and for the setup. Source links are at the bottom of this page.

How I deploy it for clients

  1. SelectionI pick the model size for your task and hardware and test it on your examples.
  2. DeploymentI deploy it on your server or in a closed network and provide an API.
  3. Fine-tuningI fine-tune it on your data (LoRA) or connect a knowledge base — whichever is cheaper for the task.
  4. IntegrationI connect it to your CRM, ERP, bot, website or team chat and set up monitoring.

Similar models

Text to speechKokorohexgrad (independent developer) · not disclosedCommercial use allowed

A tiny speech synthesis model (82M) that sounds on par with large ones. Runs on a regular CPU; English and a few other languages, no Russian.

DetailsText to speechPiperRhasspy / Open Home Foundation · USACommercial use with conditions

Very fast speech synthesis that runs even on a Raspberry Pi. Ready-made voices in 35+ languages, including several Russian ones.

DetailsText to speechF5-TTSShanghai Jiao Tong University and partners · ChinaNon-commercial only

A voice cloning model that needs only a few seconds of a sample, in English and Chinese. The community has released many fine-tuned versions for other languages, including Russian.

Details

Source: github.com/yl4579/StyleTTS2. Data checked against the model card on 22 Sep 2026. Have a lawyer review the license before commercial launch.