Text to speech is magical. This technology enables us to type out text and get the computer to read (or say) it just like a human! You will encounter Text to speech at various places in exotel platform such as Greeting and IVR applet. You just need to type in the text that you want to read out and voilà..! 

Exotel currently uses the free & open source Festival Text to speech engine presented to the world by the Center for speech technology research at the University of Edinburgh & Amazon Polly. This engine needs to be powered by a speech synthesis voice library which, for our understanding, is like a dictionary of all the possible pronunciations spoken by a single person packed as a library.

HMM based Synthesiser built by Carnegie Mellon University to be most understandable by an Indian audience.

Until we get our TTS highly suitable for Indian audience (If you have suggestions, Please send it to us!), Consider using our TTS only when testing your app (Typically on a trial number) or when you don't have a choice (Like reading numbers that the user has entered!)

How To:

  • Login to your Exotel Dashboard

  • Go to the Edit Call App, where you need to make changes

  • Click on the Greeting applet to add the text


  • Once the Greeting text is typed, Click on Save.