Company lists · Data refreshed November 2026

Top 25 HR consulting and implementation services based in the United States

Name: HR consulting and implementation 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 20,803 companies tracked

RevenueBase identified 20,803 company matches for HR consulting and implementation services associated with the United States as of November 2026 and tracks 290,725 professional contacts across them, including 85,259 with verified work emails. New York is the largest hub.

This list covers company matches for HR consulting and implementation 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

20,803Companies

290,725Contacts tracked

85,259Verified emails

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The 25 largest HR consulting and implementation services based in the United States

Ranked by team size

Top 25 of 20,803 company matches for HR consulting and implementation 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	Insight Global	Exact match	Atlanta, FL, United StatesHQ recorded Nov 6, 2026	n/a	17,957 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 · Nov 6, 2026 · View company records in RevenueBase
3	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
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	Strategy	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	1,001-5,000	5,343 contacts →
	Exact match “From strategy to execution.” 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	The Judge Group	Exact match	Wayne, WA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,363 contacts →
	Exact match “The Judge Group is an international leader in business technology consulting, talent solutions, and learning and development.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Addison Group	Exact match	Chicago, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,031 contacts →
	Exact match “Addison Group provides comprehensive talent solutions and consulting services across diverse practice areas, including Finance & Accounting, Non-Clinical Healthcare, Information…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Gyansys INC	Exact match	Carmel, IN, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,961 contacts →
	Exact match “Founded in 2005, GyanSys is a leading global system integrator company supporting enterprise customers worldwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	North Highland	Exact match	Atlanta, GA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,936 contacts →
	Exact match “North Highland helps businesses move from strategy to reality, taking a pragmatic and practical approach to build solutions that work and create impact that lasts.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Yoh, A DAY & Zimmermann Company	Exact match	Philadelphia, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,825 contacts →
	Exact match “When progress demands experience, that’s where we come in.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Sequoia	Exact match	San Mateo, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,359 contacts →
	Exact match “Sequoia is the strategic partner helping investor-backed companies of all sizes achieve their business goals through smarter people spend.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	SEGAL	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,213 contacts →
	Exact match “Segal is a leading employee-owned consulting firm with more than 1,100 professionals across North America, including 150+ credentialed actuaries.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Intelligroup	Exact match	Princeton, NJ, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,185 contacts →
	Exact match “Intelligroup is a global provider of innovative consulting, technology, and outsourcing services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Optimum Healthcare IT	Exact match	Jacksonville Beach, FL, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,122 contacts →
	Exact match “Optimum Healthcare IT, an Infosys Company, is a Best in KLAS healthcare IT digital transformation and consulting firm based in Jacksonville Beach, Florida.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	The Planet Group	Exact match	Westlake, OH, United StatesHQ recorded Nov 6, 2026	1,001-5,000	887 contacts →
	Exact match “The Planet Group is a global advisory and staffing firm operating at the intersection of talent and transformation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Russell Tobin	Exact match	New York, VA, United StatesHQ recorded Nov 6, 2026	201-500	872 contacts →
	Exact match “Bring top talent to your company with Russell Tobin.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Turnberry Solutions	Exact match	Philadelphia, PA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	817 contacts →
	Exact match “Turnberry Solutions is a business and technology consulting and implementation firm that believes brilliant strategy only matters when paired with excellent execution.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Topbloc	Exact match	Chicago, IL, United StatesHQ recorded Nov 6, 2026	501-1,000	774 contacts →
	Exact match “Everforth TopBloc leverages proprietary automation to deploy Workday’s Human Capital Management, Payroll, and Financials business services quickly and efficiently, reducing…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	NET At Work	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	201-500	763 contacts →
	Exact match “At Net at Work, we help organizations unleash the power of their business performance.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Clark Schaefer Hackett	Exact match	Dayton, OH, United StatesHQ recorded Nov 6, 2026	501-1,000	722 contacts →
	Exact match “Clark Schaefer Hackett is more than an accounting and advisory firm; we’re striving to be your most valued advisor.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	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
24	Embark	Exact match	Dallas, TX, United StatesHQ recorded Nov 6, 2026	501-1,000	671 contacts →
	Exact match “Embark is shaking up the consulting industry with a radical belief: Happy is good for business.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Infopro Learning, INC	Exact match	Princeton, United StatesHQ recorded Nov 6, 2026	501-1,000	640 contacts →
	Exact match “Infopro Learning is an award-winning workforce transformation consultancy that unlocks the potential of people to power business performance.” 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 “HR consulting and implementation 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 20,803 HR consulting and implementation services based in the United States

See the full list, filter by size, metro and specialty, and access 85,259 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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HR consulting and implementation services based in the United States at a glance

As of Nov 6, 2026

29.3%Verified-email coverage

14.0Average contacts per company

1-10Median size (employees)

4.1%Largest-city concentration · New York

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

14,613

11-50

4,114

51-200

1,431

201-500

364

501-1,000

107

1,001-5,000

100

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 20,803 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 “HR consulting and implementation 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 85,259 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.

HR consulting and implementation 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 “HR consulting and implementation services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many HR consulting and implementation services are there based in the United States?

RevenueBase identified 20,803 company matches for HR consulting and implementation 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 HR consulting and implementation services?

New York leads with 859 company records, followed by Atlanta (563) and Houston (488).

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 85,259 professional contacts with verified work emails tracked across these 20,803 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.