The skeptics society GWUP e.V. (Gesellschaft zur wissenschaftlichen Untersuchung von Parawissenschaften) was founded on October 11th, 1987. As of September 2017, GWUP has ca. 1600 members and an additional 2400 subscribers to its quarterly magazine Skeptiker. GWUP has members in Germany, Austria and Switzerland, as well as a small number in other countries. GWUP is a non-profit organisation registered in Darmstadt, Germany, which has been granted tax-free status.