Well I never knew till the other day that Zendesk started off in Denmark. Also Podio. Probably by the time a Danish company becomes successful they've already moved part of their business to Silicon Valley and everyone thinks they are a US company, like I did with Zendesk.
Lars Bak is still in Aarhus I believe, along with the core of the Google V8 team. Unity also still has most of its tech team in Copenhagen, but many people think it moved to SF, because it moved its marketing & headquarters to SF (bigger market, etc.).
