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ADP

Full-service PEO of ADP, the largest PEO segment by revenue in this list

Overview

RUN Powered by ADP is the small-business payroll platform of Automatic Data Processing, the largest US payroll processor, which reported fiscal 2026 revenue of US$21.95 billion[1]. ADP states that RUN serves more than 980,000 small businesses and pairs its software with 24/7 support from payroll professionals[1][2]. It is designed for businesses with 1–49 employees[2].

RUN is sold in four packages. Essential Payroll covers payroll processing and tax filing, recurring automatic payroll and 24/7 support; Enhanced adds ZipRecruiter hiring tools, state unemployment insurance services, background checks and wage garnishment processing; Complete Payroll & HR+ adds live HR support, an employee handbook wizard and salary benchmarks; and HR Pro adds legal assistance from a third party (Upnetic Legal Services), workplace training, a CareerPlug applicant tracking system and a learning management system[2]. The software flags likely errors before payroll is submitted, pays by direct deposit, Wisely pay card or cheque, and prepares and e-files W-2 and 1099 forms[2]. Its weaknesses are the absence of published prices and the reliance on promotions (up to six months free, under separate terms) that make the long-run cost hard to compare[2].

ADP features

  • Payroll tax calculation and filing
  • Direct deposit, Wisely pay card or cheque
  • W-2 and 1099 preparation and e-filing
  • AI error flagging before submission (RUN)
  • Mobile app for running payroll
  • PEO option through ADP TotalSource
  • AI error flagging before submission
  • W-2 and 1099 e-filing

ADP pricing

Quote-based. RUN Powered by ADP is sold as Essential, Enhanced, Complete Payroll & HR+ and HR Pro Payroll & HR; each requires a quote. ADP advertised up to six months of free payroll on RUN, subject to terms.

ADP strengths and limitations

Strengths

  • Largest disclosed client base and jurisdiction coverage
  • Products for every size, from RUN to Workforce Now
  • 24/7 live payroll support on RUN
  • PEO available for firms wanting co-employment
  • Largest small-business payroll user base
  • 24/7 live support

Limitations

  • No published pricing for any package
  • Different platforms by company size
  • HR features require higher-priced packages
  • Promotional free months carry separate terms
  • No published prices
  • HR help only on higher packages

Appears in

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