I would like to develop an app (with custom objects and tabs) and license it to some users. These users need each their own separate data and sometimes there need to be several users for one data sorce (eg. one company).
Which license is the most appropriate for me and which would be for the users? Do they need an account with Salesforce or do I issue them an account? And how do the payments go - salesforce for account and to me for licensing an app.
The app need not be on the market for beginning.