The Germans built several Reisenflugzeugen. SSW and Dornier come to mind and other manufacturers had projects underway.
AEG,Aviatik, Junkers, Schuette-Lanz, Roland, Poll, Junkers, Linke Hoffman, Krupp-Germania, Union, Zschach and the Aldershof projects were involved. All were inspired by teh Ilya Mourametz.