Reading the above comments, it seems that companies don't have much say when the government comes knocking.. Which is precisely why I think privacy should be a requirement and not an option in the design stage. The company heading towards that right now with the most advancements in technology is Snips. Data is stored on the device primarily. To help with AI(As an option), your data will be encrypted and sent to the developer along with all the data from other users as a whole big data(Data generating).