My company uses it

They have a PEO option, but FWIW they can also be used as a payroll provider / HR system (benefits access, vacation tracking, etc.) without a PEO.

Thank you for the explanation. It's been something I've been meaning to research because I'd never encountered this before my current employer and it's become something I will actually ask about in the future. I prefer smaller employers (500 or less) but this is pretty fantastic. I've worked for a Fortune 500 employer with a solid, expensive-but-generously-subsidized healthcare plan, a tiny employer with expensive coverage that wasn't all that great but I've never been able to select from three different providers with a few options a piece. It was a "killer feature" for me. My family has low-to-moderate medical needs, I like HSA eligible PPOs if the deductible/cost is right. I was able to find three plans that were taken by my family's specific specialists where I could max out the HSA deduction and pay less than half what I had at the last "typical employer plan" company. This came too…

I personally use Deel so that as a one-person company I can access large group benefits. Using their EOR saves me about $5000/year on health insurance compared to an ACA policy.