I have a team of developers (and data scientists) here in Sweden. Normal rates are around $100 / h for on-site work, and it would be nice to be able to get approximately the same online.

Comparing ourselves to freelancers on eg Upwork there is a massive price differential. Even for sites like Toptal.com you can only expect to get $75 or so (not hard data, just my impression, could be wrong on that).

What is a decent strategy for overcoming this obstacle?

I'm guessing the answer has something to do with "finding a really special niche" and "selling on value, not on cost"?