Since his retirement from SAP, Plattner has been particularly active as a benefactor in the field of technological research. Media reports have named him one of Germany's most important private sponsors of scientific research. Plattner received his honorary doctorate in 2002 and his honorary professorship in 2004 from the University of Potsdam. Plattner had also received an honorary doctorate (1990) and an honorary professorship in Information Systems (1994) from the Saarland University, Saarbrücken. The same university named him an honorary senator in 1998.