At present, all 28 EU member states as well as Iceland, Liechtenstein, Norway, Turkey, and North Macedonia participate in the program. The database of partner universities gives an overview of those European universities that have already concluded an exchange agreement with the University of Mannheim. Yet, stays abroad in countries participating in the ERASMUS program can also be funded if you decide to go to an institution other than the partner universities; this applies, in particular, for staff members going abroad with ERASMUS.
Though, at present, Switzerland does not take part in the ERASMUS program, funding terms for stays abroad in Switzerland are similar to the ERASMUS exchange program as the country finances a similar program with national funds.