[klaukholm]

No, the Crushftp ihas to reside on a computer in your end.
You only have to have it on when you need to be transferring.

It is amazingly fast in your end once you have it set up, and it is very simple for your client.
You just drop the file in a folder you have created for them and rightclicking the folder copys an html link with the password embedded which you email the client,
They only have to click on the link and they are logged in.

It zips the material on the fly and it unzips on the fly so no time is lost.