(Frank here, one of the co-founders of CallingVault.)

'Privacy' in the context of our service means two things, but in the comparison to GV, it really means that we'll never scrape your texts or voicemails for ad targeting or use your activity to build a profile of who you are.

It also means – and we share this with GV – that you can keep your personal number private by giving out your CallingVault number instead.

It's similar to what Gruber posted on daringfireball:

"Great new service, sort of like Google Voice but private."

I guess implying that Google have access to your phone calls and this company isn't going to.

Yeah, I couldn't figure out what Gruber meant by that. I guess it means that it's like Google Voice, except you have to pay for it, and it's not run by a big company that you can count on to stay in business for a long time.

Mostly it just means that Gruber is a clueless one-note hater.

More importantly, your voicemails are being used to process speech-text (Google's transcription service), and train Google's speech recognition algorithm.