What geoportals do you know built in commercial environment (ESRI ArcGis Server, Intergraph) and what do you know built with Open Source solutions (like geoserver, mapserver + Open layers)?
closed as not a real question by matt wilkie♦ Nov 8 '10 at 17:54
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, see the FAQ.
I have not seen a comparison documentation at any level (comparing websites). I think that the list is long on both sides for geoportals built with COTS, and with OS mapping engines. The question fails to ask about the data being open source. If you look at COTS geoservers with WMS or other openlayer solutions it coudl get even more confusing to ask if they are successful or not. As suggested... try to re-phrase your question.