> The server does see the audio during processing (that's how GPU transcription works), but the final stored transcript is encrypted with a key derived from your password that never leaves your browser.
You conveniently omit mentioning that the server also sees the transcript before returning it to the client side browser. Whether it is "immediately" erased, is something the client must trust the server to do. You might as well save yourself the roundtrip by encrypting server side, returning the key, then deleting it, same outcome.