"some startup from Estonia" happens to be bigger than the Bolt you are thinking of no matter how you measure it. Higher valuation, more employees, servers larger part of the world, was founded earlier etc. It makes sense to try to clear up confusion here, as anyone from Europe would assume you are talking about the very successful ride sharing company Bolt.
I was thinking about the car.
Why do you assume that? The Uber competitor is a huge company
Because the title (at least when I am reading this) states "Payment startup"