It is possibe to add other data sources to Excel that can be used for visualisation or in creating dashabords. 

From the Administration Settings, select Subject 

The Upload Subject button allows the selection of a file with the following formats CSV, TSV, XLSX, XLS and ODS, to be loaded into inmydata as a Subject. The subject is then available and can be used for building Dashboards and Visualisations.

There is also an inmydata Publisher application that can automate the upload of data.