OnSIP is a business VoIP service that uses SIP to provide end users the ability to make unconventional phone calls in a very conventional way: picking up a desk phone and dialing a number. Crank open the hood, and you’ll find that SIP technologies operate a lot like Google [Services] while behaving more like a Verizon [Telco]. The OnSIP & Highrise Click-To-Call mashup, for example, is a new Chrome extension that highlights how phone service as a software opens the gates to smarter business solutions.
If you're in Antarctica, no Twilio for you. Otherwise, there's a chance that your country is one of the 40 now supported by the Twilio API. The company announced the news at its annual conference. Most recently, it added 20 new countries, including the ability to have local phone numbers for those countries.