What virtual data room providers does everybody use to ensure that investors have consistent and uniform access to deal information during the fundraise? Any other best practices/tips for maintaining an investor dealsite during the closing process?

Historically I have been a user of Dropbox, but it does not allow easy control of downloading some documents and it also shows a list to everyone of who has been invited. Ultimately, the three features most important to me are: (1) control who has access, ie members cannot invite other members; (2) control visibility of who has access, so nobody outside of me knows who all has been invited; and (3) monitor/control the download of certain documents that may be more commercially sensitive for the seller (eg just adding a watermark is fine)

The professional platforms I've seen all cost an arm and a leg and so I thought I'd poll the Searchfunder community on any reasonably cheap and serviceable options?