I remember reading that Portal for ArcGIS was to be released with 10.1. I can see the Geoportal extension but I believe that is only for ArcGIS server? and that Portal for ArcGIS is for ArcGIS Online. Any clarification?
What are the differences between Portal for ArcGIS and ArcGIS Server? Both require hardware setup Both are used to host services. Why should i buy ArcGIS Portal when ArcGIS Server is doing the job for me? How different is ArcGIS Portal from ArcGIS Server?
What are the differences between Portal for ArcGIS and ArcGIS Server?
As Richard mentioned in his post, "Portal for ArcGIS" is basically "ArcGIS Online" - but hosted on premise on your infrastructure (i.e., on your own physical hardware or private cloud), instead of being part of Esri's cloud solution.
Portal for ArcGIS is conceptually like a content management system for your GIS data and resources. While ArcGIS Server is the product that enables you to publish and share your GIS resources as GIS web services. They are complimentary products.
Both are used to host services.
ArcGIS Server supports many different types of web services, while Portal for ArcGIS only supports tiled and feature services. By "support", I mean it can only create these types of services. You can register other types of services with Portal.