Top PEO Companies: An Insider's Guide (2026)

By Cesar Figueroa, Owner, ReUp Benefits · Licensed health insurance and PEO broker

What are the top PEO companies? The six I see most often are ADP TotalSource, TriNet, Insperity, Justworks, G&A Partners and Vensure. ADP is the biggest. Justworks is the most open about price. Insperity and G&A are the most hands-on. TriNet offers the most health plan choice, and Vensure the most flexibility.

I spent more than ten years inside the PEO industry, at three different PEOs. I've sat across the table from every company on this list, pitched against them and watched clients move between them. Every one of them is a real company that does real work. None of them is right for everyone, and the sales pitch rarely tells you where each one falls short.

So this guide does. For each PEO you'll get what it does well, where it falls short and who it fits. Everything here comes from public sources or my own experience, and nothing from any former employer's internal information. If you're new to PEOs, start with our guide to what a PEO is in insurance.

How I judged these PEO companies

This isn't a ranking. The best PEO for a 12-person software startup in Brooklyn is the wrong PEO for a 60-person roofing company in Texas. I looked at each company on five things:

1. Pricing transparency. Can you see what you're paying for, and where the PEO makes its margin?
2. Technology. How easy is the platform for you and your employees to use?
3. Service. Do you get a team that knows your company, or a queue?
4. Health plans. How many carriers, how much plan choice, and how much flexibility in how you offer them?
5. Flexibility. Can the PEO grow and change with you, or are you locked into one way of doing things?

I also checked one hard fact for each: whether it's an IRS-certified PEO (CPEO). A CPEO takes on liability for federal employment taxes on the wages it pays, which protects you if the PEO ever mishandles tax deposits. The IRS publishes its list of active CPEOs.

Top PEO companies at a glance

Best PEO for Complexity: ADP TotalSource PEO

ADP TotalSource is ADP's PEO, and it's the largest PEO in the country. It wins for best PEO for complexity, they have been doing this for decades and truly know what you will get with them. It paid an average of 762,000 worksite employees in fiscal 2026, more than twice as many as TriNet or Insperity. If you've heard of only one PEO, it's probably this one.

Top PEO for: companies that want a household name and one vendor that can handle payroll, benefits, HR, compliance and insurance in every state.

What ADP TotalSource's PEO does well

• Brand and staying power. ADP has been in payroll for decades. Nobody worries that ADP will be gone next year.
• It can do everything. Multi-state payroll, benefits, workers' comp, retirement, HR support, compliance. There's very little a growing company needs that ADP can't provide somewhere in its product line.
• Health plan reach. ADP TotalSource offers plans from Aetna, Anthem, Kaiser Permanente and UnitedHealthcare, depending on where your employees are. Our guide to the best PEO for health insurance covers carriers by PEO.
• Certified. ADP TotalSource entities are on the IRS list of certified PEOs.

Where ADP TotalSource's PEO falls short

• Older technology. In my experience, ADP's PEO platform feels dated next to newer players. It works, but it isn't where you go for a modern employee experience.
• No published pricing. ADP doesn't publish TotalSource prices. Its own guide to PEO costs gives an industry range of 2% to 12% of payroll, or about $40 to $160 per employee per month, and says TotalSource includes workers' comp in its service fee. Bundled pricing makes it hard to see what each piece costs.

What ADP's own numbers say about its PEO

Here's the part most buyers never look at. ADP's brand is built on enterprise clients and big logos. But in fiscal 2026, its PEO brought in $7.13 billion of ADP's $21.95 billion in total revenue, about 32%, according to ADP's fourth-quarter results. Nearly a third of the company runs through a business built for small and mid-size employers.

To be fair, most of that $7.13 billion is pass-through: health premiums ADP collects and pays to carriers at no markup. Take those out and PEO revenue is $2.52 billion. But the PEO still earned $936 million in segment earnings, a 13.1% margin. Spread across 762,000 worksite employees, that's roughly $1,230 per employee per year, or about $100 a month, that ADP kept after its costs.

None of that makes ADP a bad choice. It means ADP TotalSource is a very good business for ADP, and you should negotiate like it. Ask for an unbundled view of the invoice. ADP's own guide recommends exactly that. Then compare the workers' comp and state unemployment tax lines against outside numbers. Our PEO pricing guide shows where to look.

My take: ADP TotalSource is the safe, capable choice. You pay for that safety, and you won't see exactly how much unless you push for it.

Best Industry Specific PEO: TriNet PEO

TriNet is one of the largest PEOs in the country, with about 334,000 worksite employees and $5.0 billion in revenue in 2025. They have industry specific divisions and tailor their solution and teams to those industries. Founded in 1988, it has built its business around industry verticals.

Best PEO for: companies in industries TriNet specializes in that want a lot of health plan choice and room to customize.

What TriNet does well

• Industry focus. TriNet organizes its service by industry, including technology, financial services, life sciences, nonprofits, professional services, manufacturing, hospitality and more, per TriNet's own company profile. A biotech startup and a nonprofit get teams that know their world.
• Lots of health insurance options. TriNet offers one of the widest carrier lineups of any PEO, including Aetna, UnitedHealthcare, Kaiser Permanente and several Blue plans, based on where employees live.
• Customization. In my experience, TriNet gives clients more room than most to shape their benefits package and service setup.
• Certified. A TriNet subsidiary is on the IRS list of certified PEOs.

Where TriNet falls short

• No way to consolidate your health offerings. In my experience, the wide menu cuts both ways: you can't consolidate your health insurance offerings into one simpler lineup for your team.
• Older technology. In my experience, TriNet's PEO platform feels dated compared with newer platforms.
• Health plan risk. TriNet's 2025 annual report says risk-based policies make up the majority of its health plans, and its insurance cost ratio was 91% in 2025. That means TriNet carries real claims risk, and that pressure can show up at your renewal. Our guide to PEO underwriting explains how that works.

My take: If you're in one of TriNet's core industries and benefits choice matters most, it belongs on your shortlist. Go in knowing the technology and the plan structure won't feel modern. For the full picture, read our TriNet PEO review.

Best White Glove PEO: Insperity

Insperity is the white-glove PEO. Based in Houston, it paid about 310,000 worksite employees and brought in $6.8 billion in revenue in 2025.

Best PEO for: companies that want deep, hands-on HR help and are willing to pay for it.

What Insperity does well

• High-touch service. In my experience, Insperity offers more in-depth HR services than most PEOs. If you want an HR team that acts like an extension of your company, this is its strength.
• Inexpensive health insurance. In my experience, Insperity's health rates are often among the lowest you'll see. Most of its participants are on one UnitedHealthcare contract, which runs through 2028 and is partially self-funded, per its 2025 annual report.
• Certified. Insperity's PEO entities are on the IRS list of certified PEOs.

Where Insperity falls short

• Expensive fees. In my experience, the low health rates are offset by high service fees. Insperity prices as a percentage of payroll, so the fee grows with every raise and bonus. In 2025 it kept an average of $242 in gross profit per worksite employee per month after direct costs.
• Little health plan flexibility. With essentially one carrier, you get fewer choices in how you group and offer plans.
• No UCR out-of-network plans. In my experience, Insperity doesn't offer plans that pay out-of-network claims based on usual, customary and reasonable (UCR) charges. If your team uses out-of-network doctors, that matters. We explain the difference in our health insurance guide.

My take: Insperity is worth it if you'll use the service. If you mostly want cheap health insurance and a payroll platform, you'll pay for a level of service you don't need.

Best PEO for Small Businesses: Justworks

Justworks is the PEO that made pricing public and was built for small businesses. It's one of the few that lists prices on its website, and its platform is built for people who don't want to learn HR software.

Top PEO for: startups and small teams that want a modern, simple platform and a price they can see before they talk to sales.

What Justworks does well

• Transparent pricing. Justworks publishes its prices: $79 per employee per month for PEO Basic and $124 for PEO Plus, which adds medical, dental and vision administration. It says it charges no implementation fees (October 2026).
• A modern, intuitive platform. Employees can onboard, enroll in benefits and find their pay stubs without a training session. For a lean team, that saves real time.
• Around-the-clock support. Both PEO plans include 24/7 support.
• Built for global teams. Justworks pays international contractors in more than 60 countries and offers employer of record service for full-time hires abroad, so a growing company can stay on one platform.
• Certified. Justworks' employment entities are on the IRS list of certified PEOs.

Where Justworks falls short

• Less payroll flexibility. In my experience, Justworks' payroll is built to run one standard way. If your payroll is complex, you'll feel the limits.
• Few built-in add-ons. Justworks doesn't offer its own applicant tracking or performance management tools. You'll connect outside software for those.

My take: For a straightforward, white-collar team that values simplicity and wants to know the price up front, Justworks is hard to beat. Companies with complex payroll, or that want one vendor for every HR tool, should look further.

Running a startup and choosing between Justworks, Deel and Rippling? Our guide to the best PEO for startups compares their benefits, perks, global hiring and pricing.

Best Blue Collar White Glove Service PEO: G&A Partners

G&A Partners is a Houston-based PEO founded in 1995. It serves more than 6,000 clients and 130,000 worksite employees and has been growing through acquisitions, including New York's Ethan Allen HR Services in January 2026.

Best for: blue-collar and mixed workforces that want a high-touch service team.

What G&A Partners does well

• Strong with blue-collar teams. G&A serves construction, food service and hospitality, healthcare and other hands-on industries, and offers workers' comp, safety consulting and claims support.
• White-glove service. Clients get a named Client Success Manager and a dedicated team, per G&A's company profile. In my experience, its service feels a lot like Insperity's.
• More than one model. Besides its PEO, G&A offers ASO (HR and payroll support without co-employment) and HR technology with G&A support.
• Certified. A G&A entity is on the IRS list of certified PEOs.

Where G&A Partners falls short

• Older Platform: G&A like many other PEOs are built on PrismHR. Which is a completely fine technology, but is white labeled across a variety of PEOs, so it is not their own technology.
• No published pricing. Like most PEOs, you'll only see the price in a proposal.

My take: If you run a blue-collar business and want Insperity-style service, put G&A on your shortlist.

Best PEO for Optionality: Vensure

Vensure Employer Solutions is based in Chandler, Arizona, and has grown mostly by buying other PEOs and payroll companies: 108 acquisitions as of 2026. It says it serves more than 161,000 businesses.

Best for: blue-collar companies, and any company that wants options as it grows.

What Vensure does well

• Real optionality. Vensure is one of the few PEOs that can offer you almost any model: a PEO, payroll and HR technology on its own platform, Namely's HRIS, staffing services and global employer of record. In my experience, that includes self-funded health plans. You can start in one model and move to another without changing vendors.
• Blue-collar or white-collar, it doesn't matter. Vensure serves construction, specialty trades, manufacturing, food service, hotels and oil and gas alongside professional services, IT and financial firms.
• One technology platform. VensureONE pulls payroll, benefits, HR, time and attendance and reporting into one system.

Where Vensure falls short

• Not a certified PEO. Vensure doesn't appear on the IRS list of active CPEOs (August 2026). That doesn't make it a bad PEO, but it means you keep more of your federal employment tax liability, and joining mid-year can reset payroll tax wage bases.
• Uneven service. In my experience, service can leave a lot to be desired at times. A company built on 100-plus acquisitions doesn't always deliver the same experience everywhere.

My take: Vensure is a strong fit if you're blue collar, or if you want the freedom to change your setup later. Ask exactly who will service your account, and talk to a reference client your size.

Which PEO company is right for you?

Start with what matters most to you, not with the brand:

Then get real quotes from at least three. The same company can be priced very differently by each PEO, and the admin fee is only part of the price. Ask every one of them the 20 questions in our main guide, compare the full cost per employee per year, and check what PEO fees typically run for your service level. Hiring in New York? Our guide to PEO companies in New York covers where each plan is issued and which leave rules to ask about. Hiring in California? See our PEO California buying guide.

That side-by-side work is exactly what a PEO broker does: one census, several PEOs, and quotes broken down line by line.

Frequently asked questions about top PEO companies

What is the largest PEO in the United States?

ADP TotalSource. It paid an average of 762,000 worksite employees in ADP's fiscal 2026, more than twice TriNet's or Insperity's count.

Is ADP TotalSource a PEO?

Yes. ADP TotalSource is ADP's PEO. It co-employs your team, runs payroll and taxes, and puts employees on its benefit and workers' comp programs. ADP's other payroll products, like RUN and Workforce Now, are not PEOs.

How much does ADP TotalSource cost?

ADP doesn't publish TotalSource pricing. Its own guide gives an industry range of 2% to 12% of payroll, or about $40 to $160 per employee per month, with workers' comp included in the TotalSource service fee. Your quote depends on your headcount, industry and states.

Which PEO companies are IRS-certified?

Of the six in this guide, ADP TotalSource, TriNet, Insperity, Justworks and G&A Partners all have entities on the IRS active CPEO list as of August 2026. Vensure does not. You can check any PEO on the IRS list yourself.

Which PEO is best for small businesses?

It depends on what you need. For a simple team that wants transparent pricing, Justworks. For hands-on HR help, Insperity or G&A Partners. For the most health plan choice, TriNet. Compare quotes before you decide.

Which PEO is best for construction and other blue-collar businesses?

G&A Partners and Vensure are the two on this list I'd look at first. Both serve construction and the trades and offer workers' comp and safety support. Compare their workers' comp rates by class code against a standalone quote.

Want help figuring out which of these fits your company? Book a 20-minute review with me. Bring your current invoice or a PEO proposal.

Sources

This guide is general information, not legal, tax or insurance advice. Opinions marked "in my experience" are my own. Company figures are from public sources, as of October 2026 unless a different date is shown, and PEO offerings change often, so confirm details with each company.

• ADP: Fourth quarter and fiscal 2026 results (July 2026)
• ADP: What is the cost of a PEO? (2026)
• TriNet: Fourth quarter and fiscal year 2025 results (February 2026)
• TriNet: Company profile
• TriNet: 2025 annual report (Form 10-K)
• Insperity: Fourth quarter and full year 2025 results (February 2026)
• Insperity: 2025 annual report (Form 10-K)
• Justworks: Pricing
• G&A Partners: Acquisition of Ethan Allen HR Services (January 2026)
• G&A Partners: Company profile
• Vensure: 108th acquisition release (April 2026)
• Outsource Accelerator: Vensure hits 108 acquisitions (2026)
• Vensure: What blue-collar and white-collar businesses need from a PEO
• IRS: CPEO public listings (active list dated August 7, 2026)