A clear-eyed head-to-head comparison of TriNet and ADP TotalSource — pricing, service model, software, benefits, and where each one fits best. Updated for 2026.
| Attribute | TriNet | ADP |
|---|---|---|
| Best for | 20–500 employees | 50–10,000+ employees |
| Tag | Industry vertical | Enterprise scale |
| CPEO certified | Yes | Yes |
| ESAC accredited | Yes | Yes |
| Typical pricing | $120–$180 PEPM. Mid-market pricing aligned with industry-vertical expertise. | $130–$200 PEPM (~6%–10% of payroll on bundled pricing). Higher end for large organizations. |
| Service model | Industry-vertical model — dedicated teams for technology, life sciences, financial services, non-profits, professional services, and other verticals. Pod-based service rather than single named partner. | Mature enterprise model with deep multi-state and federal contractor capabilities. Named HR business partner plus extensive specialist pool. Larger client account teams. |
| Health benefits | UnitedHealthcare, Aetna, Kaiser, plus regional carriers. Strong network depth for tech-centric markets (CA, NY, MA, TX). | Aetna, UnitedHealthcare, Cigna, Kaiser. Strong national network access and large group-style buying power. |
| Technology | TriNet Platform — modern web/mobile, clean UX. Solid reporting and integrations with common SaaS tools (NetSuite, QuickBooks, Slack). | ADP Workforce Now backbone — robust, configurable, extensive reporting and analytics. Some legacy UX feel; payroll/tax engine is best-in-class. |
| ICHRA support | Limited — TriNet historically focused on group plans; ICHRA support varies by vertical and is not the default offering. | Yes — supports ICHRA administration and integration with marketplace plans. |
Mid-market businesses (20–250 employees) in tech, SaaS, life sciences, fintech, or other specialized verticals. Particularly strong for venture-backed companies.
Mid-to-large businesses (75+ employees), federal contractors, multi-state operations, regulated industries that need depth of specialist support.
The choice between TriNet and ADP TotalSource comes down to your size, complexity, and what kind of service relationship you want.
Choose TriNet if mid-market businesses (20–250 employees) in tech, saas, life sciences, fintech, or other specialized verticals. particularly strong for venture-backed companies.
Choose ADP TotalSource if mid-to-large businesses (75+ employees), federal contractors, multi-state operations, regulated industries that need depth of specialist support.
For a personalized recommendation that factors in your industry, headcount, location, and specific compliance needs, take our 2-minute quiz — we'll evaluate both of these against the rest of the 30+ PEOs we work with and recommend the three that actually fit.
TriNet typically prices at $120–$180 PEPM. Mid-market pricing aligned with industry-vertical expertise.. ADP typically prices at $130–$200 PEPM (~6%–10% of payroll on bundled pricing). Higher end for large organizations.. Actual pricing depends on your headcount, industry, and benefits selections — request custom quotes from both to compare.
Yes — moving between PEOs is mid-year possible but most companies time switches to coincide with January 1 (to align with benefits plan year and to reset payroll year-to-date wage bases). Plan 60–90 days for transition.
TriNet: Yes. ADP: Yes. CPEO certification means the PEO assumes federal payroll tax liability — important in regulated industries.
Both TriNet and ADP offer master 401(k) plans you can join. Investment lineups and fees vary — compare expense ratios and employer match flexibility during sales process.
Easiest path: use our matching quiz — we'll share your profile with both (if they fit your business) and you'll get apples-to-apples quotes. Otherwise contact each PEO's sales team directly with your headcount, industry, and zip code.
Tell us about your business in 2 minutes — we'll match you with the three PEOs that actually fit. Free service.