PEOs can share certain employment responsibilities with businesses by entering into a contractual relationship with the business, called co-employment. PEOs are able to group multiple businesses’ employees under one umbrella, giving them greater negotiating power with benefits providers. This can help them secure health insurance, retirement plans, workers’ comp and even gym memberships for their employees that rival what the big companies are offering.

Justworks is the only PEO solution that was built with startups in mind. Founded in 2012, the company has raised more than $140 million and is accredited by the Employer Services Assurance Corporation—the gold standard for PEO best practices—which means it has demonstrated financial stability, regulatory-compliant operations and ethical conduct. The accreditation comes with peace of mind—$15 million worth—in the form of surety bonds held in trust to protect the PEO’s customers, employees, insurers and taxing authorities. Another advantage of Justworks is that it focuses on the startup market, so its team knows what you’re up against. The company’s software is easy to use, and live support is available 24/7.