On-premises software (commonly misstated 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. On-premises software is sometimes referred to as “shrinkwrap” software, and off-premises software is commonly called “software as a service” ("SaaS") or “cloud computing”.
There is some debate as to the grammatical correctness of the term on-premise as a synonym for on-premises. In normal English usage, a premise is a proposition or presupposition in a logical argument, while premises (as well as being the plural of premise) means a property and its grounds, and is used only in the plural form. People have mistakenly used what they believe to be the singular form premise, yet such use is incorrect in common or legal contexts. When referring to technology, many companies and news sources commonly misuse the term on-premise such that it has become a common variant of on-premises. 
- on-premises (Webopedia)
- "On-Premise vs On-Premises – Who Cares?". Adam Fowler IT. Adam Fowler. Retrieved 18 January 2018.
- Unscramble. "On-Premises VS on premise - removing some confusion".
- Brian Madden (May 2014). "So apparently we lost the grammar war, and on-premises is just called "on premise" now?".
- "Google Trends".
- Mary Jo Foley (June 2015). "Microsoft delivers tool for connecting on-premise directories to Azure Active Directory".
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