I use Deel to hire people internationally. It's mostly an EOR company. They promised a lot though, I once thought about moving my entire HR workflow to Deel (even for local employees), but quickly decided against it.
As someone outside the US who has worked with several of those companies before. The best one for the employees was Globalization Partners. Of course they were the most expensive.
Deel is the opposite: they provide US companies with gray area (or you could even say illegal in some countries) trickstery to reduce cost of employing people.