You plan to create the Azure web apps shown in the following Table.

NET Core 3.0: Windows and Linux ASP .NET V4.7: Windows only PHP 7.3: Windows and Linux Ruby 2.6: Linux only Also, you can’t use Windows and Linux Apps in the same App Service Plan, because when you create a new App Service plan you have to choose the OS type. You can ' t mix Windows and Linux apps in the same App Service plan. So, you need 2 ASPs. Reference: https://docs.microsoft.com/en-us/azure/app-service/overview