TriNet

TriNet is a strong fit for growing businesses that are tired of juggling payroll, benefits, and compliance on their own.

The biggest upside is access to large-employer-level benefits packages that would otherwise be out of reach for a small team. The main downside is cost and opacity — pricing is custom and not published, so you'll need to go through a sales process before knowing what you'll pay, and the per-employee fees can add up quickly as your team grows.