Hi Prashanth, Both are fundamently different things. Windows Service :- Windows service is basically an application that runs without a user logged in to the system means there is no requirement of user interaction to process some data which runs in background. Whatever windows services you make you can view it by services.msc command. Web Service :- Web service is totally different from windows service it it one kind of website that provides you some kind of data in format of JSON or XML or in any format which will be then used by the customer to process further. For more details, refer the below links https://www.quora.com/What-is-the-difference-between-Windows-service-and-web-services https://stackoverflow.com/questions/1033570/what-are-the-differences-between-a-web-service-and-a-windows-service