This paper examines the potential of existing web-based collaboration services in supporting the inter-organizational connectivity throughout the collaboration process. In doing so, the paper initially presents a brief overview and a hierarchical classification with respect to the degree and complexity of service integration of existing collaboration services which are applicable in inter-organizational settings. Successively, their shortcomings in supporting the process of inter-organizational collaboration are herein determined and discussed. As a conclusion, the paper elucidates the rational and need for designing the dedicated web-based collaboration platforms for facilitating the inter-organizational connectivity within a particular business sector.