In May 2021, European Sleeper launched a crowdfunding campaign and managed to raise €500,000 in seed capital by selling shares in the cooperative to more than 350 small investors,[7] reportedly in just fifteen minutes.

[10] In June 2022, a partnership with tour operator Sunweb Group was announced, with plans to start new night train services between the Netherlands and French ski resorts by the summer of 2023, and an extension to Southern France the following year.

[11] In November, it was announced by the two parties that these plans would be put on hold, citing difficulties in securing rolling stock, track access rights and an operator for the services.

The scaled-back route would commence operations on 25 May 2023 with a view to extending service to Prague to complete the original proposal in December 2023, dependent on whether track rights can be secured.

[16] In August 2024 European Sleeper announced a new seasonal service that would connect Brussels with the Austrian Alps and Venice in February and March 2025.

[4] It would be joined by the cooperative's new dining car which launched on the Brussels-Prague route on 1 October 2024, offering a reservation-only restaurant in the evening followed by a walk-in bar open late.

[19] In an article in The Sunday Times about the inaugural Brussels to Berlin service, travel writer Kate Leahy commented, "Orient Express-style luxury this is not,"[20] but concluded it was "undeniably an adventure.