Nordic countries have the safety net countered with a mentality that is borderline entrepreneur-hostile and the law of Jante on top of that so safety nets may be the few pro-entrepreneurship things they have. Finland of the lot is also capital poor so no huge investor funds or such.
Just Eat, Deliveroo and The Hut Group; Monzo, Starling and Revolut, from another era, there's ARM.
I'm sure there's fintech ones (not a sector I know much about) and the guy who sits near me in the office, who has an AI-healthcare startup, says the Britain is very good at those too.
The UK has an advantage here over the US in that the tech and finance sectors are both based in London whereas in the US they are split between California and New York.