How a product from South Korea can expand/penetrate into the US market? I will not promote.

The US is the dream market for software startups around the world. I know some Korean startups that made big in the US, but none of them shaped their products locally and exported to the US. So, my questions are... * Are there examples of SaaS that were built locally and expanded into the US market? Preferably from Asia (I know Typeform is from Spain and Tally is from the EU.) * How did they do that? I will try to research this topic also and share the results in comments if I get meaningful insight.