PEO Comparison Guides
Independent side-by-side comparisons of the top Professional Employer Organizations. Compare pricing, IRS certification, service models, and find the right fit for your business.
Justworks is the stronger choice for businesses that want a true IRS-certified PEO with transparent pricing and reliable HR support.
Insperity and ADP TotalSource are genuinely comparable — both IRS CPEO certified, both serving the full range of business sizes, both with the depth to handle complex HR needs.
Justworks and TriNet are both excellent choices — but for different businesses.
For businesses looking for a true PEO co-employment arrangement, TriNet is the stronger choice.
ADP TotalSource and TriNet serve overlapping but distinct markets.
For startups and smaller SMBs, Justworks is the stronger recommendation.
Insperity and TriNet are remarkably evenly matched — both CPEO certified, both established 35+ year companies, both serving the mid-market well.
For businesses that want a true PEO co-employment arrangement with maximum tax protection, ADP TotalSource is the stronger choice.
Justworks and Gusto are not direct competitors — they serve different needs at different stages of business.
Insperity has the edge in this comparison, particularly because of its dedicated HR team model and consistently high client satisfaction.
PEO Authority comparison guides are editorially independent. Featured placements elsewhere on the site are paid visibility — they do not influence comparison outcomes or verdicts. All analysis is based on publicly available information, IRS CPEO certification data, and editorial review.