Raab-Katzenstein was a 1920s German aircraft manufacturer based in Kassel.
The main character of the company was its designer Gerhard Fieseler. Following World War I, he returned to printing, but yearned to return to flying. In 1926, he closed his print shop in Eschweiler and became a flight instructor with Raab-Katzenstein and continued to hone his flying skills, becoming an accomplished stunt pilot. In 1927, he performed a particularly daring routine in Zürich and started to command increasingly high fees for appearances. In 1928, he designed his own stunt plane, the Fieseler F1, built by Raab-Katzenstein. He also designed Raab-Katzenstein RK-26 Tigerschwalbe aircraft in the end of the 1920s which was offered and sold to a Swedish company called AB Svenska Järnvägverkstaderna (ASJA), which built 25 of the type for Swedish Air Force in the beginning of the 1930s.