Gusto
Gusto is a modern, online people platform that helps small businesses take care of their teams. On top of full-service payroll, Gusto offers health insurance, 401(k)s, expert HR, and team management tools.
Rippling
If you've outgrown Gusto or are looking to combine payroll and benfits with the IT components of onboarding, then Rippling might be right for you. They make it easy to manage your team's payroll, benefits, hardware (computers, phones, etc), and apps — all in one, modern platform.
Papaya Global
If you are hiring employees who live outside of the US, a company like Papaya Global can help with hiring, onboarding, paying, and managing global employees or contractors.