VETTED SAAS
Head to head · HR and Payroll

ADP vs Paychex

The two payroll institutions, head to head. ADP RUN and Paychex Flex both deliver full service payroll, tax filing and PEO options to small and growing businesses, backed by decades of compliance experience. They look alike on paper, so the difference is in fit. Here is how they compare.

Reviewed by M. HALLORAN·Updated APRIL 2026·How we vet
★ Our pick
ADP
84 /100
vs
Challenger
Paychex
83 /100
◂ ADP Advantage Paychex ▸
A close call between two payroll institutions · ADP wins on scale, breadth and HR depth, Paychex on dedicated service and small business simplicity.

These are affiliate links marked rel=“sponsored”. We may earn a commission if you buy · it never affects our scores or who wins. Disclosure.

How they score

Criteria ADP Paychex Winner
Payroll and tax depth
92
90
ADP
Compliance and scale
92
86
ADP
Dedicated support
82
88
Paychex
HR and benefits breadth
88
84
ADP
Ease of use
70
72
Paychex
Pricing transparency
60
62
Paychex

Scores are our editorial assessment against the VettedSaaS rubric · not vendor supplied.

Choose ADP if…
+You expect to scale or are mid sized
+Deep payroll, tax and compliance come first
+You want the broadest HR and benefits options
+You value a long established global provider
Choose Paychex if…
+You are a small business that wants simplicity
+You want a dedicated payroll specialist
+Hands on service matters more than breadth
+You may want a PEO or benefits bundle

Feature by feature

✓ full  ·  ∼ partial  ·  — none
Capability ADP Paychex
Full service payroll and tax filing ✓ ✓
Dedicated payroll specialist ∼ ✓
PEO option ✓ ✓
HR and talent modules ✓ ∼
Scales to large enterprise ✓ ∼
Published transparent pricing — ∼

Feature support verified as of June 2026 · check the vendor for current details.

Pricing, side by side

Base fee plus per employee, where listed
ADP Our pick
Essential $79
Enhanced Quote
Complete Quote
HR Pro Quote
Paychex Challenger
Essentials $39
Select $47
Pro Quote

Pricing as of June 2026, per employee per month unless noted. ADP RUN is quote based across four tiers; third party estimates put Essential near $79 a month plus about $4 per employee. Paychex Flex publishes Essentials at $39 a month plus $5 per employee; Select has historically been about $47 a month plus $3 per employee and is now custom quoted, and Pro and PEO plans are quote based. Vendors change plans often · check the vendor for current pricing.

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