Company lists · Data refreshed September 2026
Top 25 HR outsourcing companies based in the United States
RevenueBase identified 7,071 company matches for HR outsourcing companies associated with the United States as of September 2026 and tracks 188,107 professional contacts across them, including 49,078 with verified work emails and 59,584 with mobile numbers. New York is the largest hub.
This list covers company matches for HR outsourcing companies 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 3, 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.
The 25 largest HR outsourcing companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 17,921 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 3, 2026 · View company records in RevenueBase | |||||
| 2 | 12,667 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 · Sep 3, 2026 · View company records in RevenueBase | |||||
| 3 | 5,553 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 · Sep 3, 2026 · View company records in RevenueBase | |||||
| 4 | 4,102 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 3, 2026 · View company records in RevenueBase | |||||
| 5 | 3,554 contacts → | ||||
Exact match “Gusto has been growing the small business economy for 15+ years.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 6 | 1,948 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 · Sep 3, 2026 · View company records in RevenueBase | |||||
| 7 | 1,392 contacts → | ||||
Exact match “For 25 years, Office Beacon has helped companies scale smarter by providing fully managed remote staffing across every department, in every major industry.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 8 | 1,380 contacts → | ||||
Exact match “System One is a leading provider of specialized, highly technical outsourced services, workforce solutions, staffing, and recruiting to critical infrastructure, technology, life…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 9 | 1,249 contacts → | ||||
Exact match “SEBPO transforms operational complexity into a seamless, strategic advantage.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 10 | 1,176 contacts → | ||||
Exact match “PeopleScout, a TrueBlue company, is a global talent solutions leader.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 11 | 697 contacts → | ||||
Exact match “ZimWorX is a human resources & outsourcing company that helps companies find the best remote employees for their business and field.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 12 | 486 contacts → | ||||
Exact match “Acara is a premier provider of recruiting and workforce solutions-we help companies compete for talent.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 13 | 432 contacts → | ||||
Exact match “Apidel is a WMBE (Women & Minority Based Enterprise) & E-verified Global Staffing company.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 14 | 384 contacts → | ||||
Exact match “One of the most important aspects of any company is its people.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 15 | 362 contacts → | ||||
Exact match “Established in 2007, Intelassist is a remote staffing organization, beginning as a partnership between US-based industry professionals and an experienced operational team in…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 16 | 355 contacts → | ||||
Exact match “1840 & Company is a global staffing and outsourcing partner helping U.S.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 17 | 350 contacts → | ||||
Exact match “ICS, a Korn Ferry Company, is one of the nation’s leading staffing and recruiting companies specializing in connecting talented people to the businesses who need them.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 18 | 302 contacts → | ||||
Exact match “Transforming Businesses with Top Virtual Talent.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 19 | 290 contacts → | ||||
Exact match “Volt is a global provider of talent, technology and consulting services.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 20 | 288 contacts → | ||||
Exact match “Full Steam Staffing LLC is a privately owned national leader in providing recruitment, staffing, and human resources solutions.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 21 | 273 contacts → | ||||
Exact match “Managed Labor Solutions (MLS) is a unique provider of outsourced labor to companies large and small.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 22 | 241 contacts → | ||||
Exact match “Staff Boom specializes in customized staffing solutions and consulting for small and medium sized businesses to save money and resources, improve how they work and prevent…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 23 | 234 contacts → | ||||
Exact match “It’s important to know who you’re partnering with.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 24 | 184 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 25 | 174 contacts → | ||||
Exact match “ADP is a comprehensive global provider of cloud-based human capital management (HCM) solutions that unite HR, payroll, talent, time, tax and benefits administration, and a leader…” Recorded in the RevenueBase company graph · Sep 3, 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 outsourcing companies”. 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 7,071 HR outsourcing companies based in the United States
See the full list, filter by size, metro and specialty, and access 49,078 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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HR outsourcing companies based in the United States at a glance
As of Sep 3, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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 outsourcing companies” 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 49,078 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 3, 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 outsourcing companies 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 outsourcing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many HR outsourcing companies are there based in the United States?
RevenueBase identified 7,071 company matches for HR outsourcing companies 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?
Paychex tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most HR outsourcing companies?
New York leads with 245 company records, followed by Atlanta (153) and Houston (136).
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 49,078 professional contacts with verified work emails tracked across these 7,071 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 3, 2026.
Ready to reach these companies? Verified emails and direct dials for all 7,071 HR outsourcing companies based in the United States. Start with a free account, no credit card.
Download this list →Related lists
HR outsourcing companies by geography
- HR outsourcing companies based in Brazil
- HR outsourcing companies based in the United Kingdom
- HR outsourcing companies based in France
- HR outsourcing companies based in Mexico
- HR outsourcing companies based in Canada
- HR outsourcing companies based in the Netherlands
- HR outsourcing companies based in Australia
- HR outsourcing companies based in Argentina
- HR outsourcing companies based in Germany
- HR outsourcing companies based in South Africa
- HR outsourcing companies based in Italy
- HR outsourcing companies based in Spain
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- HR outsourcing companies based in Brazil
- HR outsourcing companies based in the United Kingdom
- HR outsourcing companies based in France
- HR outsourcing companies based in Mexico
- HR outsourcing companies based in Canada
- HR outsourcing companies based in the Netherlands
Company intelligence · public preview
Top 25 HR outsourcing companies based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 7,071 matching company records for HR outsourcing companies based in the United States, with 188,107 tracked contacts and 49,078 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 3, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 HR outsourcing companies based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Paychexpaychex.comHQ: Rochester, NY, United StatesReported employees: 10001+ | Rochester, NY, United States | 10001+ | Exact match | 17,921 contacts → |
“As the future of work continues to evolve, Paychex leads the way by making complex HR, payroll, and benefits brilliantly simple.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Express Employment Internationalexpresspros.comHQ: Oklahoma City, OK, United StatesReported employees: 10001+ | Oklahoma City, OK, United States | 10001+ | Exact match | 12,667 contacts → |
“Founded in 1983 and corporately headquartered in Oklahoma City, Express Employment International supports the Express Employment Professionals franchise and related brands.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Stradastradaglobal.comHQ: The Woodlands, TX, United StatesReported employees: 5,001-10,000 | The Woodlands, TX, United States | 5,001-10,000 | Exact match | 5,553 contacts → |
“With over 30 years as a global people, payroll, and technology leader, Strada specializes in removing complexity to simplify workforce management.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Trinettrinet.comHQ: Dublin, CA, United StatesReported employees: 1,001-5,000 | Dublin, CA, United States | 1,001-5,000 | Exact match | 4,102 contacts → |
“TriNet (NYSE: TNET) provides small and medium-size businesses (SMBs) with full-service HR solutions tailored by industry.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  GUSTOgusto.comHQ: San Francisco, CO, United StatesReported employees: 1,001-5,000 | San Francisco, CO, United States | 1,001-5,000 | Exact match | 3,554 contacts → |
“Gusto has been growing the small business economy for 15+ years.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Remedy Intelligent Staffingremedystaffing.comHQ: Atlanta, GA, United StatesReported employees: 10001+ | Atlanta, GA, United States | 10001+ | Exact match | 1,948 contacts → |
“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 description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Office Beacon LLCofficebeacon.comHQ: Redondo Beach, CA, United StatesReported employees: 5,001-10,000 | Redondo Beach, CA, United States | 5,001-10,000 | Exact match | 1,392 contacts → |
“For 25 years, Office Beacon has helped companies scale smarter by providing fully managed remote staffing across every department, in every major industry.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  System ONEsystemone.comHQ: Pittsburgh, IN, United StatesReported employees: 5,001-10,000 | Pittsburgh, IN, United States | 5,001-10,000 | Exact match | 1,380 contacts → |
“System One is a leading provider of specialized, highly technical outsourced services, workforce solutions, staffing, and recruiting to critical infrastructure, technology, life…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  SEBPOsebpo.comHQ: Marlton, NJ, United StatesReported employees: 1,001-5,000 | Marlton, NJ, United States | 1,001-5,000 | Exact match | 1,249 contacts → |
“SEBPO transforms operational complexity into a seamless, strategic advantage.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Peoplescoutpeoplescout.comHQ: Chicago, IL, United StatesReported employees: 1,001-5,000 | Chicago, IL, United States | 1,001-5,000 | Exact match | 1,176 contacts → |
“PeopleScout, a TrueBlue company, is a global talent solutions leader.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Zimworxzimworx.comHQ: Argyle, TX, United StatesReported employees: 1,001-5,000 | Argyle, TX, United States | 1,001-5,000 | Exact match | 697 contacts → |
“ZimWorX is a human resources & outsourcing company that helps companies find the best remote employees for their business and field.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Acara Solutions, An Aleron Companyacarasolutions.comHQ: Buffalo, NY, United StatesReported employees: 5,001-10,000 | Buffalo, NY, United States | 5,001-10,000 | Exact match | 486 contacts → |
“Acara is a premier provider of recruiting and workforce solutions-we help companies compete for talent.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Apidel Technologiesapideltech.comHQ: Plainfield, IL, United StatesReported employees: 5,001-10,000 | Plainfield, IL, United States | 5,001-10,000 | Exact match | 432 contacts → |
“Apidel is a WMBE (Women & Minority Based Enterprise) & E-verified Global Staffing company.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  HKA Enterpriseshkaa.comHQ: Duncan, MI, United StatesReported employees: 1,001-5,000 | Duncan, MI, United States | 1,001-5,000 | Exact match | 384 contacts → |
“One of the most important aspects of any company is its people.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Intelassistintelassist.comHQ: South San Francisco, WA, United StatesReported employees: 1,001-5,000 | South San Francisco, WA, United States | 1,001-5,000 | Exact match | 362 contacts → |
“Established in 2007, Intelassist is a remote staffing organization, beginning as a partnership between US-based industry professionals and an experienced operational team in…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  1840 & Company1840andco.comHQ: Overland Park, KS, United StatesReported employees: 1,001-5,000 | Overland Park, KS, United States | 1,001-5,000 | Exact match | 355 contacts → |
“1840 & Company is a global staffing and outsourcing partner helping U.S.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Ics, A Korn Ferry Companyinfinity-cs.comHQ: New York, OH, United StatesReported employees: 1,001-5,000 | New York, OH, United States | 1,001-5,000 | Exact match | 350 contacts → |
“ICS, a Korn Ferry Company, is one of the nation’s leading staffing and recruiting companies specializing in connecting talented people to the businesses who need them.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  MY Mountain Movermymountainmover.comHQ: Orange, CA, United StatesReported employees: 1,001-5,000 | Orange, CA, United States | 1,001-5,000 | Exact match | 302 contacts → |
“Transforming Businesses with Top Virtual Talent.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Volt Information Sciencesvolt.comHQ: New York, CA, United StatesReported employees: 5,001-10,000 | New York, CA, United States | 5,001-10,000 | Exact match | 290 contacts → |
“Volt is a global provider of talent, technology and consulting services.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Full Steam Staffingfullsteamstaffing.comHQ: Ontario, CA, United StatesReported employees: 5,001-10,000 | Ontario, CA, United States | 5,001-10,000 | Exact match | 288 contacts → |
“Full Steam Staffing LLC is a privately owned national leader in providing recruitment, staffing, and human resources solutions.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Managed Labor Solutionsmanagedlabor.netHQ: Allentown, PA, United StatesReported employees: 1,001-5,000 | Allentown, PA, United States | 1,001-5,000 | Exact match | 273 contacts → |
“Managed Labor Solutions (MLS) is a unique provider of outsourced labor to companies large and small.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Staff Boomstaffboom.comHQ: Anaheim, CA, United StatesReported employees: 1,001-5,000 | Anaheim, CA, United States | 1,001-5,000 | Exact match | 241 contacts → |
“Staff Boom specializes in customized staffing solutions and consulting for small and medium sized businesses to save money and resources, improve how they work and prevent…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Nextsourcenextsource.comHQ: New York, TN, United StatesReported employees: 1,001-5,000 | New York, TN, United States | 1,001-5,000 | Exact match | 234 contacts → |
“It’s important to know who you’re partnering with.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Deploy Hr, INCdeployhr.comHQ: Pleasanton, CA, United StatesReported employees: 1,001-5,000 | Pleasanton, CA, United States | 1,001-5,000 | Exact match | 184 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 25 |  Automatic Data Processingadp.comHQ: Durham, NC, United StatesReported employees: 10001+ | Durham, NC, United States | 10001+ | Exact match | 174 contacts → |
“ADP is a comprehensive global provider of cloud-based human capital management (HCM) solutions that unite HR, payroll, talent, time, tax and benefits administration, and a leader…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 7,071 company matches
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HR outsourcing companies: dataset insights
September 3, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
7,058 records in the displayed employee bands.
13 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 3, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
HR outsourcing companies by metro
Questions about this company list
What does Exact match mean for HR outsourcing companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many HR outsourcing companies did RevenueBase find based in the United States?
The saved snapshot records 7,071 matching company records, 188,107 tracked contacts and 49,078 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 3, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
HR outsourcing companies by geography
- HR outsourcing companies based in Brazil
- HR outsourcing companies based in the United Kingdom
- HR outsourcing companies based in France
- HR outsourcing companies based in Mexico
- HR outsourcing companies based in Canada
- HR outsourcing companies based in the Netherlands
- HR outsourcing companies based in Australia
- HR outsourcing companies based in Argentina
- HR outsourcing companies based in Germany
- HR outsourcing companies based in South Africa
- HR outsourcing companies based in Italy
- HR outsourcing companies based in Spain
Cite this list
RevenueBase Data Team. Top 25 HR outsourcing companies based in the United States. Snapshot: September 3, 2026. https://revenuebase.ai/companies/hr-outsourcing-companies/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- HR outsourcing companies based in Brazil
- HR outsourcing companies based in the United Kingdom
- HR outsourcing companies based in France
- HR outsourcing companies based in Mexico
- HR outsourcing companies based in Canada
- HR outsourcing companies based in the Netherlands
Company intelligence · public preview
Top 25 HR outsourcing companies based in the United States
RevenueBase records 7,071 matching company records for HR outsourcing companies based in the United States, with 188,107 tracked contacts and 49,078 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 3, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 HR outsourcing companies based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Paychexpaychex.com HQ: Rochester, NY, United StatesReported employees: 10001+ | Rochester, NY, United States | 10001+ | Exact match | 17,921 contacts → |
“As the future of work continues to evolve, Paychex leads the way by making complex HR, payroll, and benefits brilliantly simple.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Express Employment Internationalexpresspros.com HQ: Oklahoma City, OK, United StatesReported employees: 10001+ | Oklahoma City, OK, United States | 10001+ | Exact match | 12,667 contacts → |
“Founded in 1983 and corporately headquartered in Oklahoma City, Express Employment International supports the Express Employment Professionals franchise and related brands.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Stradastradaglobal.com HQ: The Woodlands, TX, United StatesReported employees: 5,001-10,000 | The Woodlands, TX, United States | 5,001-10,000 | Exact match | 5,553 contacts → |
“With over 30 years as a global people, payroll, and technology leader, Strada specializes in removing complexity to simplify workforce management.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Trinettrinet.com HQ: Dublin, CA, United StatesReported employees: 1,001-5,000 | Dublin, CA, United States | 1,001-5,000 | Exact match | 4,102 contacts → |
“TriNet (NYSE: TNET) provides small and medium-size businesses (SMBs) with full-service HR solutions tailored by industry.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | GUSTOgusto.com HQ: San Francisco, CO, United StatesReported employees: 1,001-5,000 | San Francisco, CO, United States | 1,001-5,000 | Exact match | 3,554 contacts → |
“Gusto has been growing the small business economy for 15+ years.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Remedy Intelligent Staffingremedystaffing.com HQ: Atlanta, GA, United StatesReported employees: 10001+ | Atlanta, GA, United States | 10001+ | Exact match | 1,948 contacts → |
“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 description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Office Beacon LLCofficebeacon.com HQ: Redondo Beach, CA, United StatesReported employees: 5,001-10,000 | Redondo Beach, CA, United States | 5,001-10,000 | Exact match | 1,392 contacts → |
“For 25 years, Office Beacon has helped companies scale smarter by providing fully managed remote staffing across every department, in every major industry.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | System ONEsystemone.com HQ: Pittsburgh, IN, United StatesReported employees: 5,001-10,000 | Pittsburgh, IN, United States | 5,001-10,000 | Exact match | 1,380 contacts → |
“System One is a leading provider of specialized, highly technical outsourced services, workforce solutions, staffing, and recruiting to critical infrastructure, technology, life…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | SEBPOsebpo.com HQ: Marlton, NJ, United StatesReported employees: 1,001-5,000 | Marlton, NJ, United States | 1,001-5,000 | Exact match | 1,249 contacts → |
“SEBPO transforms operational complexity into a seamless, strategic advantage.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Peoplescoutpeoplescout.com HQ: Chicago, IL, United StatesReported employees: 1,001-5,000 | Chicago, IL, United States | 1,001-5,000 | Exact match | 1,176 contacts → |
“PeopleScout, a TrueBlue company, is a global talent solutions leader.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Zimworxzimworx.com HQ: Argyle, TX, United StatesReported employees: 1,001-5,000 | Argyle, TX, United States | 1,001-5,000 | Exact match | 697 contacts → |
“ZimWorX is a human resources & outsourcing company that helps companies find the best remote employees for their business and field.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Acara Solutions, An Aleron Companyacarasolutions.com HQ: Buffalo, NY, United StatesReported employees: 5,001-10,000 | Buffalo, NY, United States | 5,001-10,000 | Exact match | 486 contacts → |
“Acara is a premier provider of recruiting and workforce solutions-we help companies compete for talent.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Apidel Technologiesapideltech.com HQ: Plainfield, IL, United StatesReported employees: 5,001-10,000 | Plainfield, IL, United States | 5,001-10,000 | Exact match | 432 contacts → |
“Apidel is a WMBE (Women & Minority Based Enterprise) & E-verified Global Staffing company.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | HKA Enterpriseshkaa.com HQ: Duncan, MI, United StatesReported employees: 1,001-5,000 | Duncan, MI, United States | 1,001-5,000 | Exact match | 384 contacts → |
“One of the most important aspects of any company is its people.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Intelassistintelassist.com HQ: South San Francisco, WA, United StatesReported employees: 1,001-5,000 | South San Francisco, WA, United States | 1,001-5,000 | Exact match | 362 contacts → |
“Established in 2007, Intelassist is a remote staffing organization, beginning as a partnership between US-based industry professionals and an experienced operational team in…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | 1840 & Company1840andco.com HQ: Overland Park, KS, United StatesReported employees: 1,001-5,000 | Overland Park, KS, United States | 1,001-5,000 | Exact match | 355 contacts → |
“1840 & Company is a global staffing and outsourcing partner helping U.S.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Ics, A Korn Ferry Companyinfinity-cs.com HQ: New York, OH, United StatesReported employees: 1,001-5,000 | New York, OH, United States | 1,001-5,000 | Exact match | 350 contacts → |
“ICS, a Korn Ferry Company, is one of the nation’s leading staffing and recruiting companies specializing in connecting talented people to the businesses who need them.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | MY Mountain Movermymountainmover.com HQ: Orange, CA, United StatesReported employees: 1,001-5,000 | Orange, CA, United States | 1,001-5,000 | Exact match | 302 contacts → |
“Transforming Businesses with Top Virtual Talent.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Volt Information Sciencesvolt.com HQ: New York, CA, United StatesReported employees: 5,001-10,000 | New York, CA, United States | 5,001-10,000 | Exact match | 290 contacts → |
“Volt is a global provider of talent, technology and consulting services.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Full Steam Staffingfullsteamstaffing.com HQ: Ontario, CA, United StatesReported employees: 5,001-10,000 | Ontario, CA, United States | 5,001-10,000 | Exact match | 288 contacts → |
“Full Steam Staffing LLC is a privately owned national leader in providing recruitment, staffing, and human resources solutions.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Managed Labor Solutionsmanagedlabor.net HQ: Allentown, PA, United StatesReported employees: 1,001-5,000 | Allentown, PA, United States | 1,001-5,000 | Exact match | 273 contacts → |
“Managed Labor Solutions (MLS) is a unique provider of outsourced labor to companies large and small.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Staff Boomstaffboom.com HQ: Anaheim, CA, United StatesReported employees: 1,001-5,000 | Anaheim, CA, United States | 1,001-5,000 | Exact match | 241 contacts → |
“Staff Boom specializes in customized staffing solutions and consulting for small and medium sized businesses to save money and resources, improve how they work and prevent…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Nextsourcenextsource.com HQ: New York, TN, United StatesReported employees: 1,001-5,000 | New York, TN, United States | 1,001-5,000 | Exact match | 234 contacts → |
“It’s important to know who you’re partnering with.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Deploy Hr, INCdeployhr.com HQ: Pleasanton, CA, United StatesReported employees: 1,001-5,000 | Pleasanton, CA, United States | 1,001-5,000 | Exact match | 184 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 25 | Automatic Data Processingadp.com HQ: Durham, NC, United StatesReported employees: 10001+ | Durham, NC, United States | 10001+ | Exact match | 174 contacts → |
“ADP is a comprehensive global provider of cloud-based human capital management (HCM) solutions that unite HR, payroll, talent, time, tax and benefits administration, and a leader…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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HR outsourcing companies: dataset insights
September 3, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
7,058 records in the displayed employee bands.
13 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 3, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
HR outsourcing companies by metro
Questions about this company list
What does Exact match mean for HR outsourcing companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many HR outsourcing companies did RevenueBase find based in the United States?
The saved snapshot records 7,071 matching company records, 188,107 tracked contacts and 49,078 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 3, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
HR outsourcing companies by geography
- HR outsourcing companies based in Brazil
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- HR outsourcing companies based in France
- HR outsourcing companies based in Mexico
- HR outsourcing companies based in Canada
- HR outsourcing companies based in the Netherlands
- HR outsourcing companies based in Australia
- HR outsourcing companies based in Argentina
- HR outsourcing companies based in Germany
- HR outsourcing companies based in South Africa
- HR outsourcing companies based in Italy
- HR outsourcing companies based in Spain
Cite this list
RevenueBase Data Team. Top 25 HR outsourcing companies based in the United States. Snapshot: September 3, 2026. https://revenuebase.ai/companies/hr-outsourcing-companies/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- HR outsourcing companies based in Brazil
- HR outsourcing companies based in the United Kingdom
- HR outsourcing companies based in France
- HR outsourcing companies based in Mexico
- HR outsourcing companies based in Canada
- HR outsourcing companies based in the Netherlands