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KAZOO Support Channels

This documentation is curated by 2600Hz as part of the KAZOO open source project. Join our community forums here for peer support. Only features in the space are included as part of our 2600Hz Support Services plan.

kazoo Speech#

This core library governs integrations with Text-to-Speech (TTS) providers and with (Automatic Speech Recognition (ASR) engines)[] to allow Kazoo callflows to take advantage of the advanced functionality these provide.


Kazoo, by default, will use the internal mod_flite to play the text from a TTS callflow action.

There are also modules for iSpeech and VoiceFabric.


Kazoo currently supports as an ASR engine:

  1. iSpeech
  2. Google Cloud Speech API

Service Plan Definitions#

  1. The ASR block defines usage rates for the providers
  2. The transcription block defines rates for having transcribe enabled on a vmbox
    "asr": {
           "google": {
               "rate": 1,
               "name": "Google ASR"
           "ispeech": {
               "rate": 1,
               "name": "ispeech ASR"
       "plan": {
           "voicemails": {
               "mailbox": {
                   "name": "Voicemail Box",
                   "rate": 1.99,
                   "cascade": true
               "transcription": {
                   "cascade": true,
                   "rate": 1,
                   "name": "VMBox Transcription MRC"