Low-cost high-speed rail services

thumb|right|The Ouigo logo Ouigo () is a low-cost service range of both conventional and high-speed trains run by SNCF in France, and also to Belgium in cooperation with NMBS/SNCB. The literal translation of Ouigo from French to English is "yes go"; the name is also a play on words with the English homonym "we go." It is composed of two different services: Ouigo Grande Vitesse, which is a brand of SNCF operating high-speed trains; and Ouigo Vitesse Classique, a brand under which Oslo, a subsidiary of SNCF, operates conventional speed trains.

FlixTrain GmbH is a German open-access operator of long-distance railway passenger services. It is a subsidiary of the mobility company , which also owns long-distance coach operator FlixBus and is supplementing the bus network with rail connections. The company operates closely with FlixBus, sharing its sales channels, marketing efforts, and network planning resources.

Avlo (, short for Alta Velocidad Low Cost, ) is a low-cost high-speed rail service operated by Spanish national rail company Renfe, offering services connecting major Spanish cities such as Madrid, Zaragoza, Barcelona, Valencia, Alicante and others on specific high-speed lines.

Izy () was a low-cost train service between Brussels and Paris. Services started on 3 April 2016, and ended on 10 July 2022.

Spanish railway operator, daughter company of SNCF