Hi Sisler,I don't think so, as they have a subsidiary to sell their rail passes:www.swisstravelsystem. comwww.swisstravelsystem. co.uk (for residents from the UK and Ireland)If you buy through them, you're in fact buying from the SBB. They are included amongst the resellers we list on our website as well.
All you need to know about traveling by train, bus or car in Switzerland.
Hand picked Swiss hotels and other accommodations are right here.
Swiss Travel Pass promotion: 25% discountAvailable until 11 December 2021. Book 11 months in advance. Free cancellation.https://shop.switzerlandtravelcentre.com/#/en/home.