Speech Recognition

Our demo recognizes speech from microphone. Requires Google Chrome. Press a button and say something. The result will be displayed on the right.


Vosk Open Source

  • 18+ languages
  • works offline
  • mobile and server
  • 10 platforms

Vosk Enterprise

  • more languages
  • premium accuracy
  • ongoing support
  • technology training
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Vosk Mobile

  • more languages
  • efficiency for the edge
  • iOS and Unity
  • ongoing support
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New models release


We released Chinese, Italian and Spanish models for Vosk

Hindi and Dutch model release


We released Hindi and Dutch models for Vosk

Vosk talk on ClueCon Weekly


We presented Vosk updates on ClueCon Weekly.

Video available here

Japanese model release


We released Japanese model for Vosk

Vocabulary update documentation


Recently we released long-waited documentation on the update of the acoustic model with new vocabulary. Please follow to expand the model or tune the accuracy.


Alpha Cephei primary mission is scientific. We spent more than 10 years researching speech production, speech recognition and all related areas. We have made a significant progress in understanding the nature of such a marvelous communication method as speech.

At the same time we are also the experts in implementation of the state of the art algorithms in practical systems. We excelled our capabilities during numerous projects in many companies around the world.

We hope you'll find our software, our publications and thoughts useful.

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