This seems useful for finding which site has routes between which major cities. I tested out a few routes on nightjet and if you aren't traveling between capita

This seems useful for finding which site has routes between which major cities. I tested out a few routes on nightjet and if you aren't traveling between capital cities then the route seems likely to include several transfers in the early morning hours (not exactly sleeper then). It would be nice if they showed the transfers up front, as I was only able to get them listed in a roundabout way.