Classification of Enterprise Portal systems (EP) based on their features is the topic of this paper. The authors propose a classification based on cluster analysis which depends on features collected from the internet. Results showed that systems were found to belong to different classes based on their features. This paper aspires to classify Enterprise Portals (EP). It outlines and uses Data Mining (DM) techniques to cluster EP solutions, also known as Knowledge Management (KM) tools, based on their features and capabilities, in order to help managers acquire or deploy the KM tools to choose the most appropriate tool for their organization.