Nuance? Spinvox?
This is the same Nuance Communications that acquired Spinvox, which was doing it's voice-to-text conversion by outsourcing it to large calls centres in India (at a loss, incidentally, then not paying the staff which led to a few "please, we haven't been paid in days" messages turning up in the transcribed texts).
I don't know if its still done like that, but there's no reason to assume that a human will not be listening your speech at some point.
Biting the hand that feeds IT
