On the mashup side, we list 133 voice mashups. The most common tags within voice are 61 telephony voice APIs, 13 SMS voice APIs and 12 messaging voice APIs Our directory lists 43 voice XML APIs and 23 voice JSON APIs. There are 46 voice REST APIs and 23 voice SOAP APIs. In terms of the technical details, REST and XML lead the way. Below you'll find some more stats from the directory, including the entire list of voice APIs. The most popular, in terms of mashups, is the Twilio API. Our API directory now includes 73 voice APIs.
