Company lists · Data refreshed November 2026

Top 25 Payroll and human resources services based in the United States

RevenueBase identified 4,185 company matches for payroll and human resources services associated with the United States as of November 2026 and tracks 124,798 professional contacts across them, including 43,803 with verified work emails. New York is the largest hub.

This list covers company matches for payroll and human resources services associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
4,185Companies
124,798Contacts tracked
43,803Verified emails
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The 25 largest payroll and human resources services based in the United States

Ranked by team size
Top 25 of 4,185 company matches for payroll and human resources services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchRochester, NY, United StatesHQ recorded Nov 6, 202610001+18,792 contacts →

Exact match

“As the future of work continues to evolve, Paychex leads the way by making complex HR, payroll, and benefits brilliantly simple.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchAtlanta, GA, United StatesHQ recorded Nov 6, 20261,001-5,0009,496 contacts →

Exact match

“Randstad North America, Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchThe Woodlands, TX, United StatesHQ recorded Nov 6, 20265,001-10,0005,991 contacts →

Exact match

“With over 30 years as a global people, payroll, and technology leader, Strada specializes in removing complexity to simplify workforce management.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchKingwood, TX, United StatesHQ recorded Nov 6, 20261,001-5,0004,943 contacts →

Exact match

“Since 1986, Insperity’s mission has been to help businesses succeed so communities prosper.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchDublin, CA, United StatesHQ recorded Nov 6, 20261,001-5,0004,432 contacts →

Exact match

“TriNet (NYSE: TNET) provides small and medium-size businesses (SMBs) with full-service HR solutions tailored by industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchSan Francisco, CO, United StatesHQ recorded Nov 6, 20261,001-5,0004,083 contacts →

Exact match

“Gusto has been growing the small business economy with technology and heart for more than a decade.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchChandler, FL, United StatesHQ recorded Nov 6, 20261,001-5,0002,771 contacts →

Exact match

“VensureHR is the direct employer services business unit of Vensure Employer Solutions, the largest privately held organization in the HR technology and services sector, delivering…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchLowell, MA, United StatesHQ recorded Nov 6, 20265,001-10,0002,056 contacts →

Exact match

“Built from the merger of Ultimate Software & Kronos Inc, we are now UKG.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchVancouver, WA, United StatesHQ recorded Nov 6, 2026501-1,0001,708 contacts →

Exact match

“We started as a staffing company in 1972, and over the past 50 years, evolved into a Professional Employer Organization or PEO.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchNew York, NY, United StatesHQ recorded Nov 6, 20261,001-5,0001,686 contacts →

Exact match

“Justworks takes the busyness out of growing a business and alleviates the unknown.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchHouston, CA, United StatesHQ recorded Nov 6, 2026501-1,000915 contacts →

Exact match

“Managing HR, payroll, benefits, and compliance can stretch your team thin, and mistakes are costly.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchWest Palm Beach, FL, United StatesHQ recorded Nov 6, 2026501-1,000883 contacts →

Exact match

“Oasis, A Paychex Company, is a leading Professional Employer Organization (PEO).”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchDallas, TX, United StatesHQ recorded Nov 6, 2026501-1,000860 contacts →

Exact match

“OneSource Virtual (OSV) delivers patented in-tenant technology and expert services that efficiently automate the administrative, transactional tasks of Workday payroll, taxes…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchSpringfield, KS, United StatesHQ recorded Nov 6, 2026n/a786 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchPortland, OR, United StatesHQ recorded Nov 6, 2026201-500757 contacts →

Exact match

“Trusted by more than 1 million companies, Mineral is the HR and compliance leader for growing businesses.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchTroy, MI, United StatesHQ recorded Nov 6, 2026n/a729 contacts →

Exact match

“Populus Group makes managing contingent workforces easier.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchAustin, TX, United StatesHQ recorded Nov 6, 2026501-1,000723 contacts →

Exact match

“Asure (NASDAQ: ASUR) sees Human Capital Management (HCM) through the lens of entrepreneurs and executives with an owner’s mentality.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchFrederick, MD, United StatesHQ recorded Nov 6, 2026n/a665 contacts →

Exact match

“ESIC Corporation is a company based out of 38 S Market St, Frederick, MD, United States.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchHauppauge, NY, United StatesHQ recorded Nov 6, 2026n/a617 contacts →

Exact match

“Since AccountantsWorld By IRIS is a leader in providing HR and payroll software for accountants and CPA firms.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchRichfield, NC, United StatesHQ recorded Nov 6, 2026501-1,000611 contacts →

Exact match

“We provide comprehensive HR solutions to companies of all sizes throughout the United States.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchIrving, TX, United StatesHQ recorded Nov 6, 202651-200534 contacts →

Exact match

“For over 35 years, MMC has been a trusted leader in Staffing and Payroll solutions, serving the private, public, and federal sectors with unparalleled excellence.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchBradenton, FL, United StatesHQ recorded Nov 6, 2026201-500519 contacts →

Exact match

“CoAdvantage is now CoAd.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchWichita, KS, United StatesHQ recorded Nov 6, 2026501-1,000517 contacts →

Exact match

“In today's fast-paced business landscape, multi-unit companies demand more than just basic operations-they need expert guidance and cutting-edge technology to thrive.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchSan Diego, CA, United StatesHQ recorded Nov 6, 2026201-500506 contacts →

Exact match

“Managing a contingent workforce requires careful coordination across onboarding, compliance, and ongoing workforce operations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchAjman Free Zone, United StatesHQ recorded Nov 6, 2026n/a501 contacts →

Exact match

“OBM is a leading business process management company in UAE which provides client driven business management solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 4,185 payroll and human resources services based in the United States

See the full list, filter by size, metro and specialty, and access 43,803 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Payroll and human resources services based in the United States at a glance

As of Nov 6, 2026
35.1%Verified-email coverage
29.8Average contacts per company
1-10Median size (employees)
2.2%Largest-city concentration · New York
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
2,383
11-50
1,136
51-200
388
201-500
111
501-1,000
50
1,001-5,000
62
5,001-10,000
21
10001+
22

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 4,185 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “payroll and human resources services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 43,803 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “payroll and human resources services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many payroll and human resources services are there based in the United States?

RevenueBase identified 4,185 company matches for payroll and human resources services associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Paychex tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most payroll and human resources services?

New York leads with 90 company records, followed by Houston (71) and Atlanta (63).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 43,803 professional contacts with verified work emails tracked across these 4,185 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.