TriNet vs OnPay
A head-to-head comparison to help you pick the right tool
Last updated: April 30, 2026
TriNet
TriNet is a Professional Employer Organization (PEO) that provides comprehensive HR, payroll, and benefits services to small and mid-size businesses. By acting as a co-employer, TriNet gives SMBs access to enterprise-grade benefits and HR expertise. TriNet is particularly strong in regulated industries like technology, financial services, and life sciences.
OnPay
OnPay is a full-service payroll and HR platform designed for small and mid-size businesses. It offers unlimited payroll runs, automatic tax filing, and built-in HR tools at an affordable flat rate. OnPay is consistently rated as one of the best value payroll solutions for small businesses and supports a wide range of industries including restaurants, farms, and nonprofits.
Pros
- ✓Access to premium benefits packages typically available only to large enterprises
- ✓Strong industry-specific HR expertise and compliance support
- ✓Dedicated HR advisors for each client
- ✓Comprehensive risk mitigation and employer liability protection
Cons
- ✗Expensive compared to software-only alternatives
- ✗Long-term contracts with limited flexibility
- ✗Less suitable for companies that want full control over their HR processes
Pros
- ✓Excellent value — flat monthly pricing with no per-run fees
- ✓Supports multiple pay schedules and unlimited payroll runs
- ✓Strong industry-specific features for restaurants, farms, and nonprofits
- ✓US-based customer support included on all plans
Cons
- ✗US-only — no international payroll support
- ✗Mobile app is less polished than competitors
- ✗Limited advanced HR features compared to full HRIS platforms
TriNet vs OnPay: Side by Side
| Factor | TriNet | OnPay |
|---|---|---|
| User Rating | N/A | N/A |
| Category | HR Software | Payroll Software |
| Pricing Model | Paid | Paid |
| Starting Price | Custom pricing | $40/mo + $6/person |
| Best For | SMBs in regulated industries needing full HR outsourcing | Small businesses wanting affordable, full-service payroll with no hidden fees |
| Our Pick | — | — |
TriNet Features
- ✓PEO co-employment
- ✓payroll
- ✓benefits
- ✓risk mitigation
- ✓HR support
OnPay Features
- ✓Unlimited payroll runs
- ✓automatic tax filing
- ✓direct deposit
- ✓employee self-service
- ✓HR tools
- ✓benefits administration
- ✓PTO management
- ✓integrations
Pricing Comparison
Our Take
Choose TriNet if smbs in regulated industries needing full hr outsourcing. Choose OnPay if small businesses wanting affordable, full-service payroll with no hidden fees.
Best For
SMBs in regulated industries needing full HR outsourcing
Best For
Small businesses wanting affordable, full-service payroll with no hidden fees
Also Consider
If neither TriNet nor OnPay is the right fit, Justworks is worth evaluating.
Justworks
Small businesses wanting Fortune 500 benefits
From $59/employee/mo
Frequently Asked Questions
What is the difference between TriNet and OnPay?
TriNet is best for smbs in regulated industries needing full hr outsourcing. OnPay is best for small businesses wanting affordable, full-service payroll with no hidden fees.
Which is better, TriNet or OnPay?
Choose TriNet if smbs in regulated industries needing full hr outsourcing. Choose OnPay if small businesses wanting affordable, full-service payroll with no hidden fees.
How much does TriNet cost?
TriNet starts at Custom pricing. Pricing model: Paid.
How much does OnPay cost?
OnPay starts at $40/mo + $6/person. Pricing model: Paid.
Who should use TriNet?
SMBs in regulated industries needing full HR outsourcing
Who should use OnPay?
Small businesses wanting affordable, full-service payroll with no hidden fees