For me, it’s cheaper to run a company in Estonia than my country (an EU country). You don’t pay taxes if you company has benefits. You pay taxes for the dividends only, which makes the company perfect for very early stages.

Also, for an international business a company based in Estonia looks more reliable and “techie” than other countries. And this is important if You sell digital goods or services.

I think Singapore can be a good place too, but it’s much more complicated for me.