Company lists · Data refreshed September 2026

Top 25 HR business process outsourcing firms based in the United States

Name: HR business process outsourcing firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 7,660 companies tracked

RevenueBase identified 7,660 company matches for HR business process outsourcing firms associated with the United States as of September 2026 and tracks 310,183 professional contacts across them, including 93,226 with verified work emails and 82,500 with mobile numbers. New York is the largest hub.

This list covers company matches for HR business process outsourcing firms 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 September 30, 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 Sep 30, 2026 How this list was built

7,660Companies

310,183Contacts tracked

93,226Verified emails

82,500Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest HR business process outsourcing firms based in the United States

Ranked by team size

Top 25 of 7,660 company matches for HR business process outsourcing firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 30, 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	ADP	Exact match	Roseland, NJ, United StatesHQ recorded Sep 30, 2026	10001+	84,166 contacts →
	Exact match “Designing better ways to work through cutting-edge products, premium services and exceptional experiences that enable people to reach their full potential.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
2	Paychex	Exact match	Rochester, NY, United StatesHQ recorded Sep 30, 2026	10001+	17,911 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 · Sep 30, 2026 · View company records in RevenueBase
3	Insight Global	Exact match	Atlanta, GA, United StatesHQ recorded Sep 30, 2026	n/a	15,553 contacts →
	Exact match “Insight Global is an international talent and consulting company that delivers business outcomes in an ever-changing world.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
4	LHH	Exact match	Jacksonville, FL, United StatesHQ recorded Sep 30, 2026	10001+	12,889 contacts →
	Exact match “At LHH, we believe work should be meaningful, fulfilling, and connected.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
5	Randstad USA	Exact match	Atlanta, GA, United StatesHQ recorded Sep 30, 2026	1,001-5,000	8,522 contacts →
	Exact match “Randstad North America, Inc.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
6	Paylocity	Exact match	Schaumburg, IL, United StatesHQ recorded Sep 30, 2026	5,001-10,000	6,153 contacts →
	Exact match “Paylocity (NASDAQ: PCTY) is an award-winning provider of cloud-based HR, payroll and spend management software solutions.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
7	Insperity	Exact match	Kingwood, TX, United StatesHQ recorded Sep 30, 2026	1,001-5,000	4,761 contacts →
	Exact match “Since 1986, Insperity’s mission has been to help businesses succeed so communities prosper.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
8	Trinet	Exact match	Dublin, CA, United StatesHQ recorded Sep 30, 2026	1,001-5,000	4,056 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 · Sep 30, 2026 · View company records in RevenueBase
9	PSG Global Solutions	Exact match	Marina Del Rey, CA, United StatesHQ recorded Sep 30, 2026	1,001-5,000	4,000 contacts →
	Exact match “PSG is a global leader in recruitment process optimization, delivering high-performance outsourced recruiting solutions that drive real business results.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
10	GUSTO	Exact match	San Francisco, CA, United StatesHQ recorded Sep 30, 2026	1,001-5,000	3,543 contacts →
	Exact match “Gusto has been growing the small business economy for 15+ years.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
11	Datamatics Business Solutions	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	1,001-5,000	3,000 contacts →
	Exact match “Datamatics Business Solutions is a global Business Process Management (BPM) company delivering technology-led and AI-enabled solutions that help organizations improve efficiency…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
12	Allegis Global Solutions	Exact match	Hanover, MD, United StatesHQ recorded Sep 30, 2026	1,001-5,000	2,866 contacts →
	Exact match “At Allegis Global Solutions (AGS), we’re in the human enterprise business.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
13	Stream Global Services	Exact match	Eagan, MN, United StatesHQ recorded Sep 30, 2026	10001+	2,772 contacts →
	Exact match “Stream Global Services is a premium business process outsource (BPO) service provider specializing in customer relationship management solutions including sales, customer care…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
14	Paycor	Exact match	Cincinnati, OH, United StatesHQ recorded Sep 30, 2026	1,001-5,000	2,615 contacts →
	Exact match “Paycor’s HR, payroll, and talent platform connects leaders to people, data, and expertise.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
15	Enshored	Exact match	Signal Hill, CA, United StatesHQ recorded Sep 30, 2026	1,001-5,000	2,247 contacts →
	Exact match “Enshored powers the growth of ambitious high growth companies by delivering and managing teams of elite outsourcers.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
16	Kronos Incorporated	Exact match	Lowell, MA, United StatesHQ recorded Sep 30, 2026	5,001-10,000	1,889 contacts →
	Exact match “Built from the merger of Ultimate Software & Kronos Inc, we are now UKG.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
17	Bamboohr	Exact match	Draper, UT, United StatesHQ recorded Sep 30, 2026	1,001-5,000	1,812 contacts →
	Exact match “For 16 years, BambooHR has embarked on a mission to help organizations and their employees build better workplaces and achieve their unique missions.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
18	E-Solutions	Exact match	San Jose, CA, United StatesHQ recorded Sep 30, 2026	1,001-5,000	1,669 contacts →
	Exact match “Empowering Technology Services” Founded in 2003, we are in our 22th year of structured growth.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
19	HIBOB	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	1,001-5,000	1,669 contacts →
	Exact match “HiBob is on a mission to transform how organizations operate in the modern world of work with its HR platform,"Bob." Leading the way for the future workplace, Bob offers…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
20	Broadpath	Exact match	Tucson, AZ, United StatesHQ recorded Sep 30, 2026	1,001-5,000	1,275 contacts →
	Exact match “BroadPath provides transformational outsourcing and managed services powered by our one-of-a-kind, 100% remote business model.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
21	SEBPO	Exact match	Marlton, NJ, United StatesHQ recorded Sep 30, 2026	1,001-5,000	1,237 contacts →
	Exact match “SEBPO transforms operational complexity into a seamless, strategic advantage.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
22	Peoplescout	Exact match	Chicago, IL, United StatesHQ recorded Sep 30, 2026	1,001-5,000	1,173 contacts →
	Exact match “PeopleScout, a TrueBlue company, is a global talent solutions leader.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
23	W3global	Exact match	Frisco, TX, United StatesHQ recorded Sep 30, 2026	501-1,000	1,149 contacts →
	Exact match “W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
24	Intelligroup	Exact match	Princeton, NJ, United StatesHQ recorded Sep 30, 2026	1,001-5,000	1,121 contacts →
	Exact match “Intelligroup is a global provider of innovative consulting, technology, and outsourcing services.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
25	247hire	Exact match	Oak Brook, IL, United StatesHQ recorded Sep 30, 2026	201-500	1,059 contacts →
	Exact match “At 247Hire, our mission is simple: to empower yours.” Recorded in the RevenueBase company graph · Sep 30, 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 “HR business process outsourcing firms”. 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 7,660 HR business process outsourcing firms based in the United States

See the full list, filter by size, metro and specialty, and access 93,226 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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HR business process outsourcing firms based in the United States at a glance

As of Sep 30, 2026

30.1%Verified-email coverage

26.6%Mobile-number coverage

40.5Average contacts per company

1-10Median size (employees)

3.9%Largest-city concentration · New York

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

4,527

11-50

1,805

51-200

788

201-500

263

501-1,000

101

1,001-5,000

124

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 32.0d

27,1320–30

61,65031–60

3,25761–90

10190–180

1,086180+

Company record updated

Median 94.0d

00–30

40,50031–60

87,66261–90

160,52890–180

21,493180+

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 “HR business process outsourcing firms” 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 93,226 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 September 30, 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.

HR business process outsourcing firms 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 “HR business process outsourcing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many HR business process outsourcing firms are there based in the United States?

RevenueBase identified 7,660 company matches for HR business process outsourcing firms associated with the United States as of September 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?

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

Which city has the most HR business process outsourcing firms?

New York leads with 299 company records, followed by Atlanta (172) and Houston (139).

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 93,226 professional contacts with verified work emails tracked across these 7,660 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 September 30, 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.