Company lists · Data refreshed November 2026

Top 25 Human resources services based in the United States

Name: Human resources services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 7,522 companies tracked

RevenueBase identified 7,522 company matches for human resources services associated with the United States as of November 2026 and tracks 189,668 professional contacts across them, including 48,651 with verified work emails. New York is the largest hub.

This list covers company matches for 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

7,522Companies

189,668Contacts tracked

48,651Verified emails

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The 25 largest human resources services based in the United States

Ranked by team size

Top 25 of 7,522 company matches for 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Paychex	Exact match	Rochester, NY, United StatesHQ recorded Nov 6, 2026	10001+	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
2	LHH	Exact match	Jacksonville, TX, United StatesHQ recorded Nov 6, 2026	10001+	13,920 contacts →
	Exact match “At LHH, we believe work should be meaningful, fulfilling, and connected.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Express Employment International	Exact match	Oklahoma City, OK, United StatesHQ recorded Nov 6, 2026	10001+	12,387 contacts →
	Exact match “Founded in 1983 and corporately headquartered in Oklahoma City, Express Employment International supports the Express Employment Professionals franchise and related brands.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Randstad USA	Exact match	Atlanta, GA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	9,496 contacts →
	Exact match “Randstad North America, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	City Of Chicago	Exact match	Chicago, IL, United StatesHQ recorded Nov 6, 2026	10001+	7,872 contacts →
	Exact match “The City of Chicago is the third largest city in the United States, with a population of nearly three million people.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Insperity	Exact match	Kingwood, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	4,943 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
7	Trinet	Exact match	Dublin, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	4,432 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
8	GUSTO	Exact match	San Francisco, CO, United StatesHQ recorded Nov 6, 2026	1,001-5,000	4,083 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
9	Elwood Staffing Services, INC	Exact match	Columbus, ND, United StatesHQ recorded Nov 6, 2026	n/a	3,786 contacts →
	Exact match “Whether you're looking to find your next great employee, make your next career move, or help a friend find a new job, you can trust that Elwood puts its passion and expertise into…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Staff Management SMX	Exact match	Chicago, IL, United StatesHQ recorded Nov 6, 2026	501-1,000	2,945 contacts →
	Exact match “Founded in 1988, Staff Management is a recognized leader of comprehensive workforce solutions that deliver best talent, drive compliance, yield tangible savings and build…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	CSI Companies	Exact match	Jacksonville, TN, United StatesHQ recorded Nov 6, 2026	n/a	2,237 contacts →
	Exact match “Headquartered in Jacksonville, FL, CSI Companies partners with organizations nationwide to deliver solutions-focused workforce services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Remedy Intelligent Staffing	Exact match	Atlanta, GA, United StatesHQ recorded Nov 6, 2026	10001+	2,182 contacts →
	Exact match “Remedy Intelligent Staffing is a nationwide professional staffing organization with more than 50 years of recruiting and selection expertise to match job candidates with positions…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	BBSI	Exact match	Vancouver, WA, United StatesHQ recorded Nov 6, 2026	501-1,000	1,708 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
14	Ultimate Staffing	Exact match	Orange, FL, United StatesHQ recorded Nov 6, 2026	501-1,000	1,121 contacts →
	Exact match “Meet Ultimate Staffing: Ultimate Staffing Services, a business line of Roth Staffing Companies, specializes in delivering temporary, temporary-to-hire, and direct hire services…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Hire Dynamics	Exact match	Duluth, GA, United StatesHQ recorded Nov 6, 2026	201-500	1,101 contacts →
	Exact match “Opportunities.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	G&a Partners	Exact match	Houston, CA, United StatesHQ recorded Nov 6, 2026	501-1,000	915 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
17	Columbus Consolidated Government	Exact match	Columbus, United StatesHQ recorded Nov 6, 2026	501-1,000	838 contacts →
	Exact match “As one of this area's largest employers, the consolidated city/county government offers an exciting challenge for special people that love their community and have a strong desire…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Penmac Staffing Services, INC	Exact match	Springfield, KS, United StatesHQ recorded Nov 6, 2026	n/a	786 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Mineral, Part Of Mitratech	Exact match	Portland, OR, United StatesHQ recorded Nov 6, 2026	201-500	757 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
20	Corestaff Services	Exact match	Atlanta, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	736 contacts →
	Exact match “Corestaff recruits and staffs essential operational support positions, from the production floor to the executive suite.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Harrisburg School District	Exact match	Harrisburg, PA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	733 contacts →
	Exact match “Harrisburg School District-Human Resources Department.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Comsys	Exact match	Milwaukee, WI, United StatesHQ recorded Nov 6, 2026	501-1,000	718 contacts →
	Exact match “On April 5, 2010, COMSYS became part of ManpowerGroup.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Esic Corporation	Exact match	Frederick, MD, United StatesHQ recorded Nov 6, 2026	n/a	665 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
24	Group Management Services, INC	Exact match	Richfield, NC, United StatesHQ recorded Nov 6, 2026	501-1,000	611 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
25	HTI	Exact match	Greenville, NC, United StatesHQ recorded Nov 6, 2026	1,001-5,000	610 contacts →
	Exact match “Industrial Staffing \| Professional & Skilled Hourly Recruiting \| HR Services \| Retention Strategies \| Outplacement \| Greenfield Start Ups & Expansions \| Talent Management At HTI…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “human resources services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 7,522 human resources services based in the United States

See the full list, filter by size, metro and specialty, and access 48,651 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Human resources services based in the United States at a glance

As of Nov 6, 2026

25.7%Verified-email coverage

25.2Average contacts per company

1-10Median size (employees)

3.4%Largest-city concentration · New York

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

4,981

11-50

1,524

51-200

550

201-500

181

501-1,000

1,001-5,000

114

5,001-10,000

10001+

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 7,522 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 “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 48,651 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.

Human resources services by metro

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 “human resources services”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 7,522 company matches for 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 human resources services?

New York leads with 254 company records, followed by Atlanta (180) and Houston (154).

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 48,651 professional contacts with verified work emails tracked across these 7,522 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.