Oasis is a professional employer organization that operates as a subsidiary of Paychex, one of the largest payroll and HR companies in the United States.
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PEO Software Alternatives
Alternatives to a PEO: HR software, standalone payroll, benefits administration and EOR, and when each costs less than co-employment.
Updated Sep 25, 2026
Co-employment is not the only way to get benefits and compliance help. Companies with an internal HR person often need software rather than an outsourced employer. The price gap is large: HR software is quoted in the single or low double digits per employee, while PEOs run into the hundreds.
Alternative categories and vendors
HR software typically costs $6 to $30 per employee per month compared with $150 to $350 for a PEO, according to our category research. It suits companies that can handle benefits brokerage and workers' comp themselves. Standalone payroll such as Gusto costs $49 to $180 a month plus $6 to $22 per employee, while Paychex quotes each package.
Benefits administration software helps when payroll and HR run well but enrollment and deductions do not. For international hiring, an EOR like Deel replaces the PEO model entirely in countries where you have no entity. Leaving a PEO mid-year can reset benefit deductibles, so plan any exit around the plan year.
Browse the current field
Infiniti HR is a professional employer organization focused on small businesses with 5 to 200 employees that need full-service HR outsourcing without hiring an in-house HR team.
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ScalePEO is an ESAC-accredited PEO for small businesses, offering Aetna and MetLife benefits and Slavic401k retirement plans.
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CoAdvantage is a PEO for service-industry businesses, known for workers' comp and risk management alongside payroll and benefits.
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Amplify PEO is a regional professional employer organization that runs payroll, benefits, compliance and workers' comp for small businesses.
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Engage PEO is an ESAC-accredited professional employer organization for companies with roughly 10 to 300 employees.
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Justworks is a professional employer organization that packages payroll processing, compliance support, HR tools, and access to large-group benefits into a single monthly per-employee fee.
Per-employee pricingCloudFree trial
Insperity is the premium PEO for small and mid-sized businesses that want Fortune 500-level employee benefits, dedicated HR consulting, and comprehensive compliance management without building an internal HR department.
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ADP TotalSource is the PEO division of ADP, the largest payroll and HR technology company in the world.
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Paychex is a long-established US payroll and HR provider whose Flex platform includes 401(k) administration and a PEO option.
Tiered pricingCloud
Zenefits, now sold as the TriNet HR Platform, is the HR platform that SMBs choose when benefits administration is the buying trigger.
Per-employee pricingCloudFree trial
Rippling is the HR platform that refused to stay in its lane.
Modular pricingCloud
Deel is a global hiring platform covering employer of record, contractor payments, global payroll, US PEO and a free HRIS for smaller teams.
Per-employee pricingCloudFree trial
Gusto is the payroll platform that most small businesses encounter first when they realize they need more than a spreadsheet and a quarterly trip to the accountant.
Per-employee pricingCloudFree trial
Prestige PEO is a Florida-based professional employer organization that primarily serves small businesses with 5 to 150 employees in the Southeast United States.
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Research PEO software further
Frequently asked questions
What replaces a PEO when a company grows?
Usually its own payroll, an HRIS and a benefits broker. The switch works best at plan-year end so employees do not lose progress toward deductibles.