Every PEO leads with either its software or its service team, and that choice shapes your day-to-day more than the admin fee does.
Picture two proposals on your desk. Same benefits carriers, similar workers’ comp, admin fees about $25 per employee per month apart. The cheaper one has a beautiful app. The pricier one comes with a named HR person who called you twice during the sales process. It’s easy to decide on the fee and find out six months later what you actually bought.
That’s a reasonable way to decide — the fee is the number you can see. But the thing you’ll work with every week isn’t the fee. It’s the PEO service model: whether the company is built around a platform you run yourself or a team of people you call. Every PEO is one or the other at its core, and the quote won’t tell you which.
The Two Buckets, as I Sort Them
Platform PEOs are built around the software. Onboarding, payroll, PTO, benefits enrollment, document signing — all designed to be done by you or your employees in the app, quickly and without a phone call. Support exists, but it’s structured: a help center, a chat, a ticket, tiers. Justworks and Rippling lead with this model, and they’re very good at it.
People PEOs are built around the service team. You get an assigned HR specialist or a small team, a phone number that reaches them, and a culture of “send it to us and we’ll handle it.” The software works, but it isn’t the point. Insperity and Infiniti HR lead this way, and so do most of the regional and mid-size PEOs I place clients with.
Neither bucket is the wrong answer. There are about 500 PEOs in the U.S. serving more than 200,000 businesses, and both PEO service models exist because both kinds of owners exist. The mistake isn’t choosing platform or people. It’s not knowing which one you chose, and why.
One caveat before you take the labels too literally. This is my sorting, put together from years of client feedback and the situations they’ve brought me — not an official category that PEOs check a box for. It isn’t an exact science. Plenty of PEOs will tell you they’re the best of both, and some genuinely blend the two. The buckets are a way to ask sharper questions, not a verdict on any provider.
What the PEO Service Model Changes Day to Day
Take a termination in a state where you’ve never let anyone go. On a platform PEO, you’ll find the workflow, the final-pay rules are probably in a help article, and if you open a ticket you’ll get a competent answer, usually within a business day or two. On a people PEO, you call your rep, they walk you through it, and they may run the final check for you. Same outcome. A very different hour of your life.
Or an employee with a benefits question at 5:15 on the last day of open enrollment. Platform: they use the chat or the help center, and most of the time that works. People: they call the service line and talk to a human who has answered that exact question a thousand times.
That difference is priced in. A service team costs money, and it shows up in the admin fee. A platform can charge less because it has built the answer into the software instead of into a person’s calendar. When you compare quotes side by side, a big gap in the admin fee often isn’t one PEO overcharging. It’s two different products.
Where owners get burned is the middle: buying a platform PEO and expecting people-PEO handling, or paying for a people PEO and never calling them. The first group feels abandoned. The second is paying for a relationship they don’t use.
Which Bucket You Belong In
Headcount is the first filter, but it isn’t the whole answer. What matters more is who does HR in your company today and how much judgment your workforce demands.
If you’re under about 20 employees, mostly salaried, with an owner or office manager who’s comfortable living in software, a platform PEO can be an excellent fit. A tech startup with a 12-person engineering team rarely needs a phone call. It needs clean onboarding and benefits that don’t embarrass it at the offer stage.
If you run hourly or field staff, operate in more than one state, have real turnover, or nobody on your team owns HR, you’ll lean people. A 40-person contractor with crews across two states generates the kind of questions — classifications, workers’ comp claims, terminations — that don’t resolve well in a ticket queue. You want someone who knows your account.
There’s a middle path, too. Some owners pair a platform PEO with fractional HR for the judgment calls. That works when the fractional person is genuinely available. It doesn’t when they’re a name on a retainer.
The Questions That Expose the Model Before You Sign
Sales won’t hide this if you ask directly. Most reps just don’t get asked. Ask who picks up when you call — a named person, a team, or a queue. Ask what the response target is on a ticket and whether it’s written into the agreement. Ask what’s included in the fee versus sold as a service tier. Ask to speak with someone on the service team, not sales, before you sign; a PEO that’s confident in its model will put you on the phone within a day. And ask them to walk you through one specific scenario start to finish — a termination in the state you’re about to expand into, say — and listen to whether the answer is “here’s the article” or “here’s who does it.”
None of those answers is disqualifying. They just tell you which PEO service model you’re about to buy. Sorting providers by model before anyone talks about price is part of what an independent broker should do for you, because the rep with the best pitch shouldn’t be the one deciding how your HR gets handled.
Not sure which bucket you’re buying?
A 30-minute conversation about how your company actually handles HR today usually settles it, and it tells you which PEOs are even worth quoting. No sales pitch. Just the model, the fee, and the fit.
Related: What to Ask Before Signing a PEO Contract · How PEO Pricing Actually Works · PEO vs. Fractional HR