Pentaho has the capability to load data, process it and load out from pretty much anywhere to pretty much anywhere else. This includes all of the usual suspects and some pretty esoteric data sources.
Pentaho also has the capability to add additional data sources easily.
We suggest you point your techies at this collection (realising that it’s just a sample of capability). You’ll find that they will struggle to find data sources that Pentaho cannot easily talk to and take advantage of.