Professional employer organizations (PEOs) provide comprehensive HR solutions for small and mid-sized businesses, handling payroll, benefits administration, regulatory compliance, and risk management. By entering a co-employment arrangement, businesses can offer Fortune 500-level benefits to their employees while offloading administrative burdens.
The PEO market has grown significantly, with more options than ever for businesses of all sizes. This guide covers the best PEO companies in 2025 and explains how they compare to modern alternatives like South for international hiring.
What Is a PEO and How Does It Work?
A PEO establishes a co-employment relationship with your business. In this arrangement, the PEO becomes the employer of record for tax and benefits purposes, while you maintain day-to-day control over your employees' work. The PEO handles payroll processing, tax filing, workers' compensation, health insurance, and HR compliance.
This model is particularly beneficial for small businesses (10-150 employees) that lack dedicated HR departments but need to comply with employment regulations and offer competitive benefits packages.
Top 10 PEO Companies in 2025
1. South
Best for: PEO-level services for hiring talent from Latin America.
While not a traditional PEO, South provides the same core value — handling payroll, compliance, benefits, and HR administration — specifically for U.S. companies hiring remote talent from Latin America. South acts as the employer of record in LatAm countries, managing all employment complexity so you can focus on managing your team.
Key Strengths
Full employer-of-record services for LatAm hires, payroll processing in local currencies, benefits administration including health insurance and paid time off, labor law compliance across multiple countries, and 70%+ total cost savings versus domestic hires.
2. ADP TotalSource
Best for: Enterprise-grade PEO with comprehensive technology platform.
ADP TotalSource is one of the largest PEOs in the U.S., serving businesses with 5 to 1,000+ employees. Their technology platform integrates payroll, benefits, talent management, and analytics.
3. Paychex PEO
Best for: Small business PEO with scalable services.
Paychex offers PEO services designed for small businesses, with flexible packages that scale as your company grows. Their dedicated HR professionals provide hands-on support.
4. Insperity
Best for: Mid-market PEO with premium benefits packages.
Insperity provides comprehensive PEO services with a strong emphasis on premium benefits — including health insurance, retirement plans, and employee assistance programs.
5. TriNet
Best for: Industry-specific PEO solutions.
TriNet offers PEO services tailored to specific industries including technology, financial services, professional services, and life sciences. Their industry expertise helps ensure compliance with sector-specific regulations.
6. Justworks
Best for: Modern, technology-first PEO for startups.
Justworks combines PEO services with an intuitive, modern platform designed for startups and small businesses. Their transparent pricing and user-friendly interface set them apart.
7. Rippling PEO
Best for: All-in-one HR, IT, and finance platform with PEO option.
Rippling offers PEO as part of their comprehensive workforce management platform, combining HR, payroll, benefits, device management, and app provisioning in one system.
8. Amplify PEO
Best for: Customized PEO solutions for growing businesses.
Amplify provides tailored PEO services with flexible configurations, allowing businesses to choose which services to outsource and which to keep in-house.
9. Oasis (a Paychex Company)
Best for: PEO with strong compliance and risk management.
Oasis specializes in compliance-heavy industries, providing robust risk management, workers' compensation, and regulatory compliance support.
10. CoAdvantage
Best for: PEO with personalized, dedicated support teams.
CoAdvantage assigns dedicated HR, payroll, and benefits specialists to each client, providing a more personalized experience than larger PEO providers.
PEO vs. EOR vs. South: Understanding the Differences
| Feature | Traditional PEO | Employer of Record (EOR) | South |
|---|---|---|---|
| Relationship | Co-employment | Full employment | Full employment (in LatAm) |
| Geographic Focus | Domestic (U.S.) | Global | Latin America |
| Talent Sourcing | You source talent | You source talent | South sources and vets talent |
| Cost Savings | 10-20% on HR admin | Varies | 70%+ on total labor costs |
| Best For | U.S. HR outsourcing | Global hiring compliance | Hiring LatAm talent end-to-end |
How to Choose the Right PEO
Company Size Compatibility
Some PEOs are designed for small businesses (5-50 employees) while others target mid-market or enterprise. Choose one that matches your current size and growth trajectory.
Benefits Quality
Compare the benefits packages offered. Larger PEOs like ADP and Insperity can negotiate better insurance rates due to their aggregate employee count.
Technology Platform
Evaluate the PEO's technology — payroll processing, benefits enrollment, time tracking, and reporting should be modern, intuitive, and integrate with your existing tools.
International Capabilities
If you plan to hire internationally, traditional PEOs will not suffice. South provides PEO-equivalent services specifically for U.S. companies hiring in Latin America.
Pricing Transparency
PEO pricing typically ranges from $900-$1,500 per employee per year, or 2-12% of payroll. Ensure you understand all fees, including administration charges and benefits markups.
Why South Is the Best Choice for PEO and Employment Services
South specializes in connecting U.S. companies with pre-vetted, English-fluent professionals from Latin America. With timezone-aligned talent, rigorous screening, and end-to-end support for payroll, compliance, and onboarding, South delivers the quality of a top-tier hire at a fraction of the cost.
Schedule a free consultation with South today →
The Takeaway
PEOs are a powerful solution for U.S. businesses looking to outsource HR complexity. For domestic employees, traditional PEOs like ADP TotalSource, Insperity, and Justworks are excellent choices. But if you want to expand your team internationally — hiring exceptional talent from Latin America at 70%+ savings — South provides PEO-level service with the added benefit of talent sourcing, vetting, and placement.
Frequently Asked Questions
What is a PEO?
A Professional Employer Organization (PEO) is a company that provides comprehensive HR services through a co-employment arrangement. The PEO handles payroll, benefits, compliance, and risk management while you manage your employees' day-to-day work.
How much does a PEO cost?
PEO pricing typically ranges from $900-$1,500 per employee per year, or 2-12% of gross payroll. Costs vary based on the services included, company size, and industry.
What is the difference between a PEO and an EOR?
A PEO creates a co-employment relationship for domestic employees. An EOR (Employer of Record) becomes the full legal employer, which is necessary for international hiring. South acts as an EOR for LatAm hires.
Can a PEO help with international hiring?
Traditional PEOs focus on U.S. employment. For international hiring, you need an EOR service. South provides EOR services specifically for LatAm hiring, with the added benefit of sourcing and vetting talent.
