OP"On-Premise" is where you buy the software and host it on your own IT infrastructure.
You run the servers, you handle the upgrades, you do the maintenance and security (we will obviously help get you up and running!). For organizations with a large IT infrastructure with the right skillset, our on-premise option is a great option as it gives you maximum flexibility.
You also get the benefit of the lowest ongoing costs, if you consider that your IT infrastructure will probably be virtualized, and your IT staff are already paid for!
Just like SaaS, you will always own the data. In addition, because you bought it, you'll always own the software too. Customers that continue to invest in maintenance will get full access to all the latest releases at no extra cost.