Fun list to scroll through. I had no idea about most of these startups, although some where familiar. For example, I saw Grafana Labs in the list. And Klarna is not exactly a startup any longer...
Just because a company uses computers in some form, doesn't make them a tech company. I know many retailers who are just that: retailers, who use pretty sophisticated software and employ a ton of developers, but they aren't tech companies and would never claim to be one.
I tried to use a mix of "criteria" such as company age, whether it acts like a startup/scaleup (rapid innovation, invests heavily in growth, needs external funding to get going), whether it's covered intensely by the startup-focused tech media etc.
To me, Klarna ticks those boxes.
Aaah. Not a startup anymore.