On Premises: In an on-premises environment, resources are deployed in-house and within an enterprise's IT infrastructure. On Premises: For enterprises that deploy software on premise, they are responsible for the ongoing costs of the server hardware, power consumption, and space.
On-premises software (also referred to as on-premise, and alternatively abbreviated on-prem) is installed and runs on computers on the premises of the person or organization using the software, rather than at a remote facility such as a server farm or cloud.