Sounds a lot like what Twilio is offering with their OpenVBX. I am not sure how much statistics tracking is available with Twilio but you can host the service (

Sounds a lot like what Twilio is offering with their OpenVBX. I am not sure how much statistics tracking is available with Twilio but you can host the service (I don't recall if they provide some hosting plan). Additionally Twilio OpenVBX is opensource.