Athento ECM (based on Nuxeo) is part of a suite. All the components are offered under the same subscription. The document capture module (Athento SE) and the document management platform (Athento ECM-Nuxeo) are stand alone and can work separately.
Athento ECM is independent from the Athento Suite in the sense that it can be connected with other tools, for example, other document capture tools.
Athento SE is independent from Athento Suite in the sense that it can be connected to other document management tools, such as Alfresco, vía CMIS or Web Services integration.
Rhombus creates no dependency as all plugins generated by Rhombus may be edited and maintained manually or automatically with development tools.
If the customer wants to change one or more modules of the suite it is technically possible and not expensive.