Hoiio Voice API

Hoiio Voice
Hoiio is a global communication service seeking to allow people around the world to communicate via telephone or SMS by routing through Hoiio service. The Hoiio Voice API provides powerful APIs to make calls and handle voice responses (IVR). All these services are built on top of Hoiio's cloud infrastructure, so your app automatically scales as needed. Hoiio also provides virtual numbers for receiving inbound calls and free TTS services. No hardware is needed from the developer. It is a pay-per-use model, with zero setup fee.