We support calling calling over 170 countries: http://www.twilio.com/pricing/international-calling-rates
In addition, you can make client-to-client calls that never touch the traditional phone network and will work anywhere in the world.
In addition, you can make client-to-client calls that never touch the traditional phone network and will work anywhere in the world.
Hopefully you'll come to Europe in a year or two, because your product really does look fantastic :)