Voice: speakers and sound

Silero VAD

The most popular open speech detector: tells voice apart from silence and noise. Processes an audio chunk in under a millisecond on a single CPU core; trained on recordings in more than 6,000 languages.

Developer
Silero, Russia
First release
Dec 2020
Latest release
Nov 2025
Sizes
about 2 MB
License
Commercial use allowedMIT
Russian
Supported
Running
On your own serverAlso runs without a GPU
Industries
Customer support, Software development, Media and production
Deploy on your server GitHub

What it does

  • Cutting calls and recordings before speech recognition
  • Detecting when the customer is speaking in a voice bot
  • Filtering out silence and noise to save on transcription

Where it is used

Call centersVoice bots and assistantsMedia and podcasts

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. v6.2
  2. v6
  3. v5
  4. v4
  5. v3
  6. Первая версия

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.
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 Silero VAD be used in a commercial project?

Yes. License: MIT. It allows commercial use, but it is still worth having a lawyer review the license before launch.

What hardware does Silero VAD 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 Silero VAD support Russian?

Yes, Russian is listed on the model card.

Where can I download Silero VAD and what does it cost?

The Silero VAD 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

Voice: speakers and soundTEN VADAgora (TEN project) · USA / ChinaCommercial use with conditions

A lightweight speech detector for real-time voice assistants: it notices the start and end of a phrase faster than Silero VAD. Runs on servers, phones and in the browser.

DetailsVoice: speakers and soundFireRedVADFireRedTeam (Xiaohongshu) · ChinaCommercial use allowed

A speech and sound event detector: tells apart speech, singing and music. In a 102-language test (the FLEURS set, which includes Russian) it beat Silero VAD and TEN VAD. Has a streaming mode.

DetailsVoice: speakers and soundSmart TurnDaily (Pipecat) · USACommercial use allowed

Uses intonation to tell whether a person has finished a thought or just paused, so a voice bot does not interrupt. Version 3 is 8 MB, runs on a CPU and understands 23 languages, including Russian.

Details

Source: github.com/snakers4/silero-vad. Data checked against the model card on 22 Sep 2026. Have a lawyer review the license before commercial launch.