Their sample code page (https://developer.v.me/docs/sample_code https://developer.v.me/docs/sample_code) indicates they are using Chase Paymentech underneath.

Their sample code page (https://developer.v.me/docs/sample_code https://developer.v.me/docs/sample_code) indicates they are using Chase Paymentech underneath. V.me appears to be a service layer abstraction (read: middleman). It will be interesting to see if this gains traction; they obviously have the name recognition.