SBB GmbH, also known as SBB Deutschland, is a railway company that operates services in Germany and the cantons of Basel-City and Schaffhausen in Switzerland.

Swiss Federal Railways founded the original SBB GmbH in 2002 to operate the S5 and S6 services of the Basel S-Bahn.

THURBO, itself a subsidiary of Swiss Federal Railways with support from the canton of Thurgau, founded EuroTHURBO in 2003 to handle THURBO's cross-border operations on the Seehas route, which belongs to Bodensee S-Bahn (Lake Constance S-Bahn).

[1] In addition to the Seehas and Basel S-Bahn services, the company began operating the Schaffhausen S-Bahn service between Erzingen and Schaffhausen in 2018, and between Singen (Hohentwiel) and Schaffhausen in 2022.

[2] As of the December 2023 timetable change,[update] SBB GmbH operates the following services (Seehas and S62 also perate for Bodensee S-Bahn):[3][4] SBB GmbH owns 20 Stadler FLIRT multiple units and 4 Stadler GTW 2/6 railcars.