Most AI voice tools send your text to a server, read it there and send the audio back. That's a problem for contracts, medical notes, school work, unpublished books and anything under an NDA, and it means paying for every minute you listen.
VoicedByMe runs its voice model on your own graphics card or Apple silicon chip. Nothing you read or record is uploaded, there is no account, and you can listen to as much as you like: no character limits and no monthly plan. It also works on a plane, on a train or behind a strict company firewall.