Company lists · Data refreshed September 2026

Top 25 Managed service providers for HR based in the United States

Name: Managed service providers for HR based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 7,952 companies tracked

RevenueBase identified 7,952 managed service providers for HR headquartered in the United States as of September 2026 and tracks 242,065 professional contacts across them, including 88,315 with verified work emails. New York is the largest hub.

This list covers managed service providers for HR headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

7,952Companies

242,065Contacts tracked

88,315Verified emails

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

The 25 largest managed service providers for HR based in the United States

Ranked by team size

Top 25 of 7,952 managed service providers for HR based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to managed service providers for HR: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	ADP	Indirect evidence	Roseland, NJ, United StatesHQ checked Sep 28, 2026	10001+	84,166 contacts →
	Indirect evidence “Designing better ways to work through cutting-edge products, premium services and exceptional experiences that enable people to reach their full potential.” Source: RevenueBase Database · checked Sep 28, 2026
2	Paychex	Partial evidence	Rochester, NY, United StatesHQ checked Sep 28, 2026	10001+	17,911 contacts →
	Partial evidence “As the future of work continues to evolve, Paychex leads the way by making complex HR, payroll, and benefits brilliantly simple.” Source: RevenueBase Database · checked Sep 28, 2026
3	Compucom	Indirect evidence	Fort Mill, SC, United StatesHQ checked Sep 28, 2026	5,001-10,000	7,753 contacts →
	Indirect evidence “Unleash Your Digital Workplace Potential with Compucom To be at the forefront of your industry, having the right technology is non-negotiable.” Source: RevenueBase Database · checked Sep 28, 2026
4	DEEL	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	5,001-10,000	6,510 contacts →
	Strong evidence “Deel is one platform for payroll, HR, benefits, mobility, performance, and device management across 150+ countries.” Source: RevenueBase Database · checked Sep 28, 2026
5	Insperity	Indirect evidence	Kingwood, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	4,761 contacts →
	Indirect evidence “Since 1986, Insperity’s mission has been to help businesses succeed so communities prosper.” Source: RevenueBase Database · checked Sep 28, 2026
6	Trinet	Partial evidence	Dublin, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	4,056 contacts →
	Partial evidence “TriNet (NYSE: TNET) provides small and medium-size businesses (SMBs) with full-service HR solutions tailored by industry.” Source: RevenueBase Database · checked Sep 28, 2026
7	GUSTO	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	3,543 contacts →
	Indirect evidence “Gusto has been growing the small business economy for 15+ years.” Source: RevenueBase Database · checked Sep 28, 2026
8	IT Convergence	Indirect evidence	Irving, IL, United StatesHQ checked Sep 28, 2026	501-1,000	1,950 contacts →
	Indirect evidence “IT Convergence is a global Oracle Platinum Partner with a comprehensive service offering across all three pillars of the Cloud (IaaS, PaaS, SaaS), including Consulting/Advisory…” Source: RevenueBase Database · checked Sep 28, 2026
9	GURU	Partial evidence	Rockville, MD, United StatesHQ checked Sep 28, 2026	n/a	1,906 contacts →
	Partial evidence “Established in 1995, GURU is an IT managed service provider that specializes in infrastructure support, systems integration, data architecture, data hosting, and cloud services.” Source: RevenueBase Database · checked Sep 28, 2026
10	Eplus INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,749 contacts →
	Indirect evidence “ePlus is a customer-first, services-led, results-driven and trusted industry leader that helps organizations secure, modernize, optimize, and scale every aspect of their IT…” Source: RevenueBase Database · checked Sep 28, 2026
11	SSS	Indirect evidence	Littleton, CO, United StatesHQ checked Sep 28, 2026	n/a	1,376 contacts →
	Indirect evidence “Employee Based Systems (EBS) is a innovative HRMS software development, implementation training, support, and services company specializing in helping companies improve…” Source: RevenueBase Database · checked Sep 28, 2026
12	Solugenix	Indirect evidence	Brea, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,063 contacts →
	Indirect evidence “Technology only matters when it helps the business run better.” Source: RevenueBase Database · checked Sep 28, 2026
13	Synoptek	Partial evidence	Costa Mesa, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,037 contacts →
	Partial evidence “Synoptek is a leading global managed services provider and technology consulting firm that delivers transformative business results.” Source: RevenueBase Database · checked Sep 28, 2026
14	CCB Technology	Indirect evidence	Racine, WI, United StatesHQ checked Sep 28, 2026	n/a	1,018 contacts →
	Indirect evidence “CCB Technology provides award-winning IT support and project services to customers nationwide.” Source: RevenueBase Database · checked Sep 28, 2026
15	Intellipro	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	501-1,000	990 contacts →
	Indirect evidence “IntelliPro Group Inc.” Source: RevenueBase Database · checked Sep 28, 2026
16	IT By Design	Indirect evidence	Freehold, NJ, United StatesHQ checked Sep 28, 2026	501-1,000	928 contacts →
	Indirect evidence “For more than 20 years, IT By Design has been the growth partner MSPs trust to scale profitably.” Source: RevenueBase Database · checked Sep 28, 2026
17	Harvard Maintenance	Partial evidence	Miami, FL, United StatesHQ checked Sep 28, 2026	5,001-10,000	819 contacts →
	Partial evidence “Harvard Maintenance is one of the largest and fastest growing privately owned providers of high quality managed services in the US.” Source: RevenueBase Database · checked Sep 28, 2026
18	Buchanan Technologies	Indirect evidence	Grapevine, TX, United StatesHQ checked Sep 28, 2026	501-1,000	818 contacts →
	Indirect evidence “As a leading IT consulting and outsourcing services firm, Buchanan Technologies helps organizations across North America turn their business technology into a powerful competitive…” Source: RevenueBase Database · checked Sep 28, 2026
19	Apptix	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	n/a	762 contacts →
	Indirect evidence “Apptix was acquired by Fusion Connect in 2016.” Source: RevenueBase Database · checked Sep 28, 2026
20	Topbloc	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	501-1,000	756 contacts →
	Partial evidence “Everforth TopBloc leverages proprietary automation to deploy Workday’s Human Capital Management, Payroll, and Financials business services quickly and efficiently, reducing…” Source: RevenueBase Database · checked Sep 28, 2026
21	TPX	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	751 contacts →
	Indirect evidence “TPx is the reliable sidekick every growing business deserves, powering your tech while you take the lead.” Source: RevenueBase Database · checked Sep 28, 2026
22	System Soft Technologies	Partial evidence	Tampa, FL, United StatesHQ checked Sep 28, 2026	501-1,000	732 contacts →
	Partial evidence “System Soft Group is an IT services and solutions company that helps organizations overcome limited managed IT capabilities and achieve key technology goals.” Source: RevenueBase Database · checked Sep 28, 2026
23	Talent Solutions Tapfin	Partial evidence	Milwaukee, WI, United StatesHQ checked Sep 28, 2026	5,001-10,000	700 contacts →
	Partial evidence “TAPFIN is the industry-leading Managed Service Provider that works with organizations to enable an integrated approach to analyze and manage external talent on a global basis.” Source: RevenueBase Database · checked Sep 28, 2026
24	IT Solutions	Partial evidence	Fort Washington, PA, United StatesHQ checked Sep 28, 2026	501-1,000	683 contacts →
	Partial evidence “With 30 years of experience as a trusted managed services provider, we're your dedicated partner in navigating the complex world of technology, so you can focus on growing your…” Source: RevenueBase Database · checked Sep 28, 2026
25	Populus Group	Partial evidence	Troy, MI, United StatesHQ checked Sep 28, 2026	n/a	636 contacts →
	Partial evidence “Populus Group makes managing contingent workforces easier.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: managed service providers for HR. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names managed service providers for HR.
Partial evidence: Its own public description names part of managed service providers for HR, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name managed service providers for HR. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 7,952 managed service providers for HR based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 88,315 reachable decision-makers.

Free signup · no credit card

View the full list →

Managed service providers for HR based in the United States at a glance

As of Sep 28, 2026

36.5%Verified-email coverage

30.4Average contacts per company

1-10Median size (employees)

2.9%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

4,550

11-50

2,533

51-200

614

201-500

127

501-1,000

1,001-5,000

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 7,952 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among managed service providers for HR, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “managed service providers for HR”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names managed service providers for HR), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among managed service providers for HR, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 88,315 across the full list. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Managed service providers for HR by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names managed service providers for HR, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many managed service providers for HR are there based in the United States?

RevenueBase identified 7,952 managed service providers for HR headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

ADP, headquartered in Roseland, tops this list with the largest team on record.

Which city has the most managed service providers for HR?

New York leads with 227 headquartered companies, followed by Houston (157) and Atlanta (114).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 88,315 verified decision-maker contacts tracked across these 7,952 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 7,952 managed service providers for HR based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Managed service providers for HR by geography

Browse the directory

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 Smart Search, 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.