Zoho on IntraNet

Is there any way to get Zoho so that it is not running on the internet, but rather an intranet? I don't want all of my data exposed to the interenet. I'd like to host it on a server in house. Is there another application that would let me do that? I'm trying to get out from under the thumb of Microsoft, but everyone seems to be rushing to put their data out on the Web. That doesn't seem smart to me. I have legal obligations for the data that I'm responsible for. For all I know, the staff at Zoho is a bunch of pimply faced 14 year olds. I'm sure their not, but my point is that I have no control over backups, UPS maintenance, etc. I want this product, but I want it in-house under my control.