[gwbas1c]

I'm the desktop client lead for Syncplicity. We are an enterprise file synchronization solution. EMC bought us in 2012.

1) Not only do we let you remove shared folders from a user's account, I designed our remote wipe feature that can go and delete those files from users computers. (It's a best-effort approach.)

2) We also support remote wipe from devices as well.

3) I'm not sure what kind of encryption you're looking for. In general, encryption with cloud storage introduces support difficulties, and makes it hard to do web-based access. We allow you to host your files on your own servers, so that might provide enough security to address your concerns.

4) We do allow reverting a folder to a known date, but you need to contact support.

5) Unfortunately, our APIs aren't public. Our management tools are in use at many large organizations, though.

[mcbain]

I won't be the first to ask but: Linux client, please.

[noir_lord]

Seconded.

Dropbox will keep me as a customer purely because my entire business is run on Linux (except for the Mac my business partner uses).