"Aren't you worried that it takes few weeks(days?) of coding for dropbox team and one update for your solution to become obsolete?" Wouldnt this logic apply to every project? What if Google Docs just builds a dropbox type app on top of it? Google certainly had more resources and superb tech talent. I think all companies have their focus and are already very busy getting their product right. If you think there is a need for which you have the right solution - build it. Who knows - Dropbox might just buy you out.

I agree that it's a risk, but they haven't done it so far. Even if they did, Safebox might still be useful for people using other cloud storage providers (or even corporate file shares).

Well, if you did not quit your job to do this project and did not spend all your savings on it - the risk might be worth it. Good luck! :)

Is it possible for Dropbox to update in any way that could let them read it? I'm not sure what you're worried about.

The answer to your question is: no, it's not possible. I was rather thinking about dropbox implementing the same feature directly to dropbox. If they do, there would be no point in using denishennessy's product.