Know any other projects that use Sphinx? Please add them!


  • Cairo: Cairo provides an enterprise grade, Media Resource Control Protocol Version 2 (MRCPv2) compliant speech server solution utilizing sphinx 4.

  • Asterisk plugin: Integrates pocketsphinx into Asterisk.

  • Freeswitch: Asterisk alternative. It uses pocketsphinx to offer speech recognition.

  • jvoicexml: Free VoiceXML interpreter for Java with an open architecture for custom extensions.

  • Zanzibar: Zanzibar OpenIVR is a complete, standards based, open source IVR.

  • UniMRCP: open source MRCP implementation.

Desktop Voice assistants

  • Jasper : Personal assistant for Raspberry Pi.

  • Gnome-Voice-Control: Gnome-Voice-Control is a dialogue system to control the GNOME Desktop.

  • perlbox: Provides voice solutions for Linux and Unix desktop control.

  • Mammoth: Becoming a full blown high concurrency C++ Flash Streaming Server running on windows and *nix. Uses pocketsphinx for speech recognition.

  • Twitterkiller - TWiT podcast improver, filters advertizing

  • Arabisc - Arabic acoustic model.

  • Voicekey – voice-controlled keyboard for GNU/Linux.

  • SpeechLion – Desktop control application using Sphinx4 and FreeTTS written in python.

  • Nightingale - Voice Web Browser

  • Misterhouse – an open source home automation program.

  • Vedics – Yet another command-and-control specifically for guys from India! Only check if you are Indian from the Punjab!

  • Babble Planet – A serious game for children to learn spoken English thanks to Sphinx.

  • In Verbis Virtus – A fantasy first person game in which you cast spells using your voice.

  • PocketVox – Pocketsphinx-based voice control for GNOME

  • ILA voice assistant – ILA voice assistant


  • Inimesed – Android application to deal contacts.

  • Vague – Voice extension for Kual on Kindle

Other interesting things



Art Installations

Interoperation with other engines Speech Recognition Model Conversion (See also htk2s3conv in our sources).