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vosk-api

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Project Description

Offline speech recognition API for Android, iOS, Raspberry Pi and servers with Python, Java, C# and Node

vosk-api: Offline speech recognition API for Android, iOS, Raspberry Pi and servers with Python, Java, C# and

Project Title

vosk-api — Open Source Offline Speech Recognition API for Multiple Platforms

Overview

Vosk-api is an open-source offline speech recognition toolkit that supports over 20 languages and dialects. It offers continuous large vocabulary transcription, zero-latency response with streaming API, reconfigurable vocabulary, and speaker identification. Vosk-api is unique in its ability to scale from small devices like Raspberry Pi or Android smartphones to large clusters, making it versatile for various applications.

Key Features

  • Supports 20+ languages and dialects for speech recognition
  • Small model size (50 Mb) with continuous transcription capabilities
  • Zero-latency response and streaming API for real-time processing
  • Reconfigurable vocabulary and speaker identification
  • Bindings available for Python, Java, Node.JS, C#, C++, Rust, Go, and others

Use Cases

  • Chatbots and virtual assistants for improved user interaction
  • Smart home appliances for voice control
  • Creating subtitles for movies and transcriptions for lectures and interviews
  • Speech recognition in environments without internet access

Advantages

  • Offline operation eliminates the need for internet connectivity
  • Small model size allows for deployment on resource-constrained devices
  • Versatile language support for global applications
  • Scalability from small devices to large clusters

Limitations / Considerations

  • The project's license is currently unknown, which may affect its use in commercial applications
  • Performance may vary depending on the complexity of the language or dialect
  • The accuracy of speaker identification and transcription may be influenced by environmental factors such as background noise

Similar / Related Projects

  • Mozilla DeepSpeech: An open-source speech-to-text engine that is also capable of offline operation but focuses more on English language recognition.
  • Kaldi: A popular open-source speech recognition toolkit that offers more advanced features but at the cost of higher complexity and resource requirements.
  • CMU Sphinx: A toolkit for speech recognition providing multiple language support but with a steeper learning curve compared to Vosk-api.

Basic Information


📊 Project Information

  • Project Name: vosk-api
  • GitHub URL: https://github.com/alphacep/vosk-api
  • Programming Language: Jupyter Notebook
  • ⭐ Stars: 12,861
  • 🍴 Forks: 1,532
  • 📅 Created: 2019-09-03
  • 🔄 Last Updated: 2025-08-03

🏷️ Project Topics

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Project Information

Created on 9/3/2019
Updated on 9/16/2025