Basecamp's maternity/paternity policy is "Paid Parental Leave: When you welcome a new baby, Basecamp encourages you to take up to 16 weeks maternity leave and up to 6 weeks paternity leave, at 100% paid salary. Single fathers, or primary care givers, can also take up to 16 weeks." (correct as of 2016)
As I understand it that's amazing compared to most American companies. It's roughly equivalent to what you get in progressive European countries.
It's comparable to mainland Europe, and better than some: in Netherland, I believe paternity leave has just been expanded from 2 days to 2 weeks. 6 weeks is significantly better, but probably falls short of what Scandinavian parents get.
As I understand it that's amazing compared to most American companies. It's roughly equivalent to what you get in progressive European countries.