Company lists · Data refreshed September 2026
Top 25 Employee relations outsourcing companies based in the United States
RevenueBase identified 3,857 company matches for employee relations outsourcing companies associated with the United States as of September 2026 and tracks 156,501 professional contacts across them, including 52,327 with verified work emails. New York is the largest hub.
This list covers company matches for employee relations 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 28, 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 employee relations outsourcing companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 28, 2026 · View company records in RevenueBase | |||||
| 2 | 8,522 contacts → | ||||
Exact match “Randstad North America, Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 3 | 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 28, 2026 · View company records in RevenueBase | |||||
| 4 | 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 28, 2026 · View company records in RevenueBase | |||||
| 5 | 2,866 contacts → | ||||
Exact match “At Allegis Global Solutions (AGS), we’re in the human enterprise business.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 6 | 2,437 contacts → | ||||
Exact match “VensureHR is the direct employer services business unit of Vensure Employer Solutions, the largest privately held organization in the HR technology and services sector, delivering…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 7 | 1,591 contacts → | ||||
Exact match “We started as a staffing company in 1972, and over the past 50 years, evolved into a Professional Employer Organization or PEO.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 8 | 1,430 contacts → | ||||
Exact match “Hiring someone in another country shouldn't mean months of legal setup and compliance risk in a jurisdiction you’re not familiar with.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 9 | 1,024 contacts → | ||||
Exact match “ECLARO is an award-winning Talent Solutions firm headquartered in New York City and operating in the U.S, Canada and the Philippines.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 10 | 840 contacts → | ||||
Exact match “Managing HR, payroll, benefits, and compliance can stretch your team thin, and mistakes are costly.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 11 | 828 contacts → | ||||
Exact match “Oasis, A Paychex Company, is a leading Professional Employer Organization (PEO).” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 12 | 792 contacts → | ||||
Exact match “Global employer of record (EOR) and agent of record (AOR) services, exclusively for the talent procurement sector.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 13 | 586 contacts → | ||||
Exact match “CoAdvantage is now CoAd.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 14 | 553 contacts → | ||||
Exact match “Industrial Staffing | Professional & Skilled Hourly Recruiting | HR Services | Retention Strategies | Outplacement | Greenfield Start Ups & Expansions | Talent Management At HTI…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 15 | 535 contacts → | ||||
Exact match “We provide comprehensive HR solutions to companies of all sizes throughout the United States.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 16 | 480 contacts → | ||||
Exact match “Founded in 2008, PACER is a Minority Woman-owned Global Staffing firm serving Fortune 500 Clients with customized and scalable workforce solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 17 | 436 contacts → | ||||
Exact match “PrismHR creates exceptional software and services, empowering human resource outsourcing service providers such as Professional Employer Organizations (PEOs) and HR outsourcers to…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 18 | 383 contacts → | ||||
Exact match “FrankCrum offers outsourced HR, payroll and payroll administration, employee benefits and benefits administration, 401(k), workers compensation and HR Solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 19 | 382 contacts → | ||||
Exact match “One of the most important aspects of any company is its people.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 20 | 381 contacts → | ||||
Exact match “Headway Workforce Solutions is a leading B2B (Business to Business) provider of HR Administration Outsourcing and Talent Solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 21 | 353 contacts → | ||||
Exact match “ExtensisHR, one of the largest Professional Employer Organizations (PEOs) in the U.S, is looking for talented people to join our team!” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 22 | 341 contacts → | ||||
Exact match “Engage PEO delivers comprehensive HR solutions to small and medium-sized businesses, sharpening their competitive advantage.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 23 | 341 contacts → | ||||
Exact match “Most founders don't start a business because they love navigating HR compliance, filing payroll taxes, or negotiating healthcare premiums.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 24 | 334 contacts → | ||||
Exact match “Somos parte de ARCH Resources Group, un conglomerado líder en el desarrollo de soluciones en Recursos Humanos, con presencia en 12 países del continente.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 25 | 332 contacts → | ||||
Exact match “IntelliSource continues to redefine the outsourcing space through our breadth of experience, unique personality, and fresh approach to problem-solving, which is integrated into…” Recorded in the RevenueBase company graph · Sep 28, 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 “employee relations 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 3,857 employee relations outsourcing companies based in the United States
See the full list, filter by size, metro and specialty, and access 52,327 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Employee relations outsourcing companies based in the United States at a glance
As of Sep 28, 2026Companies by employee count
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 3,857 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 “employee relations 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 52,327 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 28, 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.
Employee relations outsourcing companies by metro
- Employee relations outsourcing companies in New York133
- Employee relations outsourcing companies in Atlanta68
- Employee relations outsourcing companies in Houston62
- Employee relations outsourcing companies in Los Angeles57
- Employee relations outsourcing companies in Chicago49
- Employee relations outsourcing companies in Austin47
- Employee relations outsourcing companies in Miami47
- Employee relations outsourcing companies in San Diego47
- Employee relations outsourcing companies in Dallas41
- Employee relations outsourcing companies in San Francisco39
- Employee relations outsourcing companies in Denver35
- Employee relations outsourcing companies in Phoenix34
- Employee relations outsourcing companies in Tampa33
- Employee relations outsourcing companies in Charlotte31
- Employee relations outsourcing companies in Washington31
- Employee relations outsourcing companies in Orlando29
- Employee relations outsourcing companies in Boston28
- Employee relations outsourcing companies in San Antonio28
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 “employee relations outsourcing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many employee relations outsourcing companies are there based in the United States?
RevenueBase identified 3,857 company matches for employee relations 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?
ADP tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most employee relations outsourcing companies?
New York leads with 133 company records, followed by Atlanta (68) and Houston (62).
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 52,327 professional contacts with verified work emails tracked across these 3,857 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 28, 2026.
Ready to reach these companies? Verified emails and direct dials for all 3,857 employee relations outsourcing companies based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Employee relations outsourcing companies by geography
- Employee relations outsourcing companies based in Brisbane, Australia
- Employee relations outsourcing companies based in Melbourne, Australia
- Employee relations outsourcing companies based in Perth, Australia
- Employee relations outsourcing companies based in Sydney, Australia
- Employee relations outsourcing companies based in Belo Horizonte, Brazil
- Employee relations outsourcing companies based in Campinas, Brazil
- Employee relations outsourcing companies based in Curitiba, Brazil
- Employee relations outsourcing companies based in Porto Alegre, Brazil
- Employee relations outsourcing companies based in Rio De Janeiro, Brazil
- Employee relations outsourcing companies based in Sao Paulo, Brazil
- Employee relations outsourcing companies based in Calgary, Canada
- Employee relations outsourcing companies based in Edmonton, Canada
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
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- Employee relations outsourcing companies based in Brisbane, Australia
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- Employee relations outsourcing companies based in Perth, Australia
- Employee relations outsourcing companies based in Sydney, Australia
- Employee relations outsourcing companies based in Belo Horizonte, Brazil
- Employee relations outsourcing companies based in Campinas, Brazil
Company intelligence · public preview
Top 25 employee relations 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 3,857 matching company records for employee relations outsourcing companies based in the United States, with 156,501 tracked contacts and 52,327 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 28, 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 employee relations 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 |  ADPadp.comHQ: Roseland, NJ, United StatesReported employees: 10001+ | Roseland, NJ, United States | 10001+ | Exact match | 84,166 contacts → |
“Designing better ways to work through cutting-edge products, premium services and exceptional experiences that enable people to reach their full potential.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Randstad USArandstadusa.comHQ: Atlanta, GA, United StatesReported employees: 1,001-5,000 | Atlanta, GA, United States | 1,001-5,000 | Exact match | 8,522 contacts → |
“Randstad North America, Inc.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Insperityinsperity.comHQ: Kingwood, TX, United StatesReported employees: 1,001-5,000 | Kingwood, TX, United States | 1,001-5,000 | Exact match | 4,761 contacts → |
“Since 1986, Insperity’s mission has been to help businesses succeed so communities prosper.” Recorded description excerpt · September 28, 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 | 4,056 contacts → |
“TriNet (NYSE: TNET) provides small and medium-size businesses (SMBs) with full-service HR solutions tailored by industry.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Allegis Global Solutionsallegisglobalsolutions.comHQ: Hanover, MD, United StatesReported employees: 1,001-5,000 | Hanover, MD, United States | 1,001-5,000 | Exact match | 2,866 contacts → |
“At Allegis Global Solutions (AGS), we’re in the human enterprise business.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Vensure Employer Solutionsvensure.comHQ: Chandler, AZ, United StatesReported employees: 1,001-5,000 | Chandler, AZ, United States | 1,001-5,000 | Exact match | 2,437 contacts → |
“VensureHR is the direct employer services business unit of Vensure Employer Solutions, the largest privately held organization in the HR technology and services sector, delivering…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  BBSIbbsi.comHQ: Vancouver, WA, United StatesReported employees: 501-1,000 | Vancouver, WA, United States | 501-1,000 | Exact match | 1,591 contacts → |
“We started as a staffing company in 1972, and over the past 50 years, evolved into a Professional Employer Organization or PEO.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Safeguard Globalsafeguardglobal.comHQ: Austin, TX, United StatesReported employees: 1,001-5,000 | Austin, TX, United States | 1,001-5,000 | Exact match | 1,430 contacts → |
“Hiring someone in another country shouldn't mean months of legal setup and compliance risk in a jurisdiction you’re not familiar with.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Eclaroeclaro.comHQ: New York, NY, United StatesReported employees: 1,001-5,000 | New York, NY, United States | 1,001-5,000 | Exact match | 1,024 contacts → |
“ECLARO is an award-winning Talent Solutions firm headquartered in New York City and operating in the U.S, Canada and the Philippines.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  G&a Partnersgnapartners.comHQ: Houston, TX, United StatesReported employees: 501-1,000 | Houston, TX, United States | 501-1,000 | Exact match | 840 contacts → |
“Managing HR, payroll, benefits, and compliance can stretch your team thin, and mistakes are costly.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  OASISoasisadvantage.comHQ: West Palm Beach, FL, United StatesReported employees: 501-1,000 | West Palm Beach, FL, United States | 501-1,000 | Exact match | 828 contacts → |
“Oasis, A Paychex Company, is a leading Professional Employer Organization (PEO).” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  People2.0people20.comHQ: King Of Prussia, PA, United StatesReported employees: 501-1,000 | King Of Prussia, PA, United States | 501-1,000 | Exact match | 792 contacts → |
“Global employer of record (EOR) and agent of record (AOR) services, exclusively for the talent procurement sector.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Coadvantagecoad.comHQ: Bradenton, FL, United StatesReported employees: 201-500 | Bradenton, FL, United States | 201-500 | Exact match | 586 contacts → |
“CoAdvantage is now CoAd.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  HTIhtijobs.comHQ: Greenville, SC, United StatesReported employees: 1,001-5,000 | Greenville, SC, United States | 1,001-5,000 | Exact match | 553 contacts → |
“Industrial Staffing | Professional & Skilled Hourly Recruiting | HR Services | Retention Strategies | Outplacement | Greenfield Start Ups & Expansions | Talent Management At HTI…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Group Management Services, INCgroupmgmt.comHQ: Richfield, OH, United StatesReported employees: 501-1,000 | Richfield, OH, United States | 501-1,000 | Exact match | 535 contacts → |
“We provide comprehensive HR solutions to companies of all sizes throughout the United States.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Pacer Groupthepacer.comHQ: Philadelphia, PA, United StatesReported employees: 1,001-5,000 | Philadelphia, PA, United States | 1,001-5,000 | Exact match | 480 contacts → |
“Founded in 2008, PACER is a Minority Woman-owned Global Staffing firm serving Fortune 500 Clients with customized and scalable workforce solutions.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Prismhrprismhr.comHQ: Chandler, AZ, United StatesReported employees: 201-500 | Chandler, AZ, United States | 201-500 | Exact match | 436 contacts → |
“PrismHR creates exceptional software and services, empowering human resource outsourcing service providers such as Professional Employer Organizations (PEOs) and HR outsourcers to…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Frankcrumfrankcrum.comHQ: Clearwater, FL, United StatesReported employees: 201-500 | Clearwater, FL, United States | 201-500 | Exact match | 383 contacts → |
“FrankCrum offers outsourced HR, payroll and payroll administration, employee benefits and benefits administration, 401(k), workers compensation and HR Solutions.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  HKA Enterpriseshkaa.comHQ: Duncan, SC, United StatesReported employees: 1,001-5,000 | Duncan, SC, United States | 1,001-5,000 | Exact match | 382 contacts → |
“One of the most important aspects of any company is its people.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Headway Workforce Solutionsheadwaywfs.comHQ: Raleigh, NC, United StatesReported employees: Not recorded | Raleigh, NC, United States | Not recorded | Exact match | 381 contacts → |
“Headway Workforce Solutions is a leading B2B (Business to Business) provider of HR Administration Outsourcing and Talent Solutions.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Extensishrextensishr.comHQ: Iselin, NJ, United StatesReported employees: 201-500 | Iselin, NJ, United States | 201-500 | Exact match | 353 contacts → |
“ExtensisHR, one of the largest Professional Employer Organizations (PEOs) in the U.S, is looking for talented people to join our team!” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Engage PEOengagepeo.comHQ: Fort Lauderdale, FL, United StatesReported employees: 501-1,000 | Fort Lauderdale, FL, United States | 501-1,000 | Exact match | 341 contacts → |
“Engage PEO delivers comprehensive HR solutions to small and medium-sized businesses, sharpening their competitive advantage.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Nextepnextep.comHQ: Norman, OK, United StatesReported employees: 201-500 | Norman, OK, United States | 201-500 | Exact match | 341 contacts → |
“Most founders don't start a business because they love navigating HR compliance, filing payroll taxes, or negotiating healthcare premiums.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Arch Latamarchlatam.comHQ: Miami, FL, United StatesReported employees: 201-500 | Miami, FL, United States | 201-500 | Exact match | 334 contacts → |
“Somos parte de ARCH Resources Group, un conglomerado líder en el desarrollo de soluciones en Recursos Humanos, con presencia en 12 países del continente.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Intellisourceintellisource.comHQ: Denver, CO, United StatesReported employees: 501-1,000 | Denver, CO, United States | 501-1,000 | Exact match | 332 contacts → |
“IntelliSource continues to redefine the outsourcing space through our breadth of experience, unique personality, and fresh approach to problem-solving, which is integrated into…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 3,857 company matches
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Employee relations outsourcing companies: dataset insights
September 28, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
3,853 records in the displayed employee bands.
4 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 3,857 companies.
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.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
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 28, 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 ↗
Employee relations outsourcing companies by metro
- Employee relations outsourcing companies in New York133
- Employee relations outsourcing companies in Atlanta68
- Employee relations outsourcing companies in Houston62
- Employee relations outsourcing companies in Los Angeles57
- Employee relations outsourcing companies in Chicago49
- Employee relations outsourcing companies in Austin47
- Employee relations outsourcing companies in Miami47
- Employee relations outsourcing companies in San Diego47
- Employee relations outsourcing companies in Dallas41
- Employee relations outsourcing companies in San Francisco39
- Employee relations outsourcing companies in Denver35
- Employee relations outsourcing companies in Phoenix34
- Employee relations outsourcing companies in Tampa33
- Employee relations outsourcing companies in Charlotte31
- Employee relations outsourcing companies in Washington31
- Employee relations outsourcing companies in Orlando29
- Employee relations outsourcing companies in Boston28
- Employee relations outsourcing companies in San Antonio28
Questions about this company list
What does Exact match mean for employee relations 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 employee relations outsourcing companies did RevenueBase find based in the United States?
The saved snapshot records 3,857 matching company records, 156,501 tracked contacts and 52,327 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 28, 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
Employee relations outsourcing companies by geography
- Employee relations outsourcing companies based in Brisbane, Australia
- Employee relations outsourcing companies based in Melbourne, Australia
- Employee relations outsourcing companies based in Perth, Australia
- Employee relations outsourcing companies based in Sydney, Australia
- Employee relations outsourcing companies based in Belo Horizonte, Brazil
- Employee relations outsourcing companies based in Campinas, Brazil
- Employee relations outsourcing companies based in Curitiba, Brazil
- Employee relations outsourcing companies based in Porto Alegre, Brazil
- Employee relations outsourcing companies based in Rio De Janeiro, Brazil
- Employee relations outsourcing companies based in Sao Paulo, Brazil
- Employee relations outsourcing companies based in Calgary, Canada
- Employee relations outsourcing companies based in Edmonton, Canada
Cite this list
RevenueBase Data Team. Top 25 employee relations outsourcing companies based in the United States. Snapshot: September 28, 2026. https://revenuebase.ai/companies/employee-relations-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
- Employee relations outsourcing companies based in Brisbane, Australia
- Employee relations outsourcing companies based in Melbourne, Australia
- Employee relations outsourcing companies based in Perth, Australia
- Employee relations outsourcing companies based in Sydney, Australia
- Employee relations outsourcing companies based in Belo Horizonte, Brazil
- Employee relations outsourcing companies based in Campinas, Brazil
Company intelligence · public preview
Top 25 employee relations outsourcing companies based in the United States
RevenueBase records 3,857 matching company records for employee relations outsourcing companies based in the United States, with 156,501 tracked contacts and 52,327 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 28, 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 employee relations 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 | ADPadp.com HQ: Roseland, NJ, United StatesReported employees: 10001+ | Roseland, NJ, United States | 10001+ | Exact match | 84,166 contacts → |
“Designing better ways to work through cutting-edge products, premium services and exceptional experiences that enable people to reach their full potential.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Randstad USArandstadusa.com HQ: Atlanta, GA, United StatesReported employees: 1,001-5,000 | Atlanta, GA, United States | 1,001-5,000 | Exact match | 8,522 contacts → |
“Randstad North America, Inc.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Insperityinsperity.com HQ: Kingwood, TX, United StatesReported employees: 1,001-5,000 | Kingwood, TX, United States | 1,001-5,000 | Exact match | 4,761 contacts → |
“Since 1986, Insperity’s mission has been to help businesses succeed so communities prosper.” Recorded description excerpt · September 28, 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 | 4,056 contacts → |
“TriNet (NYSE: TNET) provides small and medium-size businesses (SMBs) with full-service HR solutions tailored by industry.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Allegis Global Solutionsallegisglobalsolutions.com HQ: Hanover, MD, United StatesReported employees: 1,001-5,000 | Hanover, MD, United States | 1,001-5,000 | Exact match | 2,866 contacts → |
“At Allegis Global Solutions (AGS), we’re in the human enterprise business.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Vensure Employer Solutionsvensure.com HQ: Chandler, AZ, United StatesReported employees: 1,001-5,000 | Chandler, AZ, United States | 1,001-5,000 | Exact match | 2,437 contacts → |
“VensureHR is the direct employer services business unit of Vensure Employer Solutions, the largest privately held organization in the HR technology and services sector, delivering…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | BBSIbbsi.com HQ: Vancouver, WA, United StatesReported employees: 501-1,000 | Vancouver, WA, United States | 501-1,000 | Exact match | 1,591 contacts → |
“We started as a staffing company in 1972, and over the past 50 years, evolved into a Professional Employer Organization or PEO.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Safeguard Globalsafeguardglobal.com HQ: Austin, TX, United StatesReported employees: 1,001-5,000 | Austin, TX, United States | 1,001-5,000 | Exact match | 1,430 contacts → |
“Hiring someone in another country shouldn't mean months of legal setup and compliance risk in a jurisdiction you’re not familiar with.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Eclaroeclaro.com HQ: New York, NY, United StatesReported employees: 1,001-5,000 | New York, NY, United States | 1,001-5,000 | Exact match | 1,024 contacts → |
“ECLARO is an award-winning Talent Solutions firm headquartered in New York City and operating in the U.S, Canada and the Philippines.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | G&a Partnersgnapartners.com HQ: Houston, TX, United StatesReported employees: 501-1,000 | Houston, TX, United States | 501-1,000 | Exact match | 840 contacts → |
“Managing HR, payroll, benefits, and compliance can stretch your team thin, and mistakes are costly.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | OASISoasisadvantage.com HQ: West Palm Beach, FL, United StatesReported employees: 501-1,000 | West Palm Beach, FL, United States | 501-1,000 | Exact match | 828 contacts → |
“Oasis, A Paychex Company, is a leading Professional Employer Organization (PEO).” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | People2.0people20.com HQ: King Of Prussia, PA, United StatesReported employees: 501-1,000 | King Of Prussia, PA, United States | 501-1,000 | Exact match | 792 contacts → |
“Global employer of record (EOR) and agent of record (AOR) services, exclusively for the talent procurement sector.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Coadvantagecoad.com HQ: Bradenton, FL, United StatesReported employees: 201-500 | Bradenton, FL, United States | 201-500 | Exact match | 586 contacts → |
“CoAdvantage is now CoAd.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | HTIhtijobs.com HQ: Greenville, SC, United StatesReported employees: 1,001-5,000 | Greenville, SC, United States | 1,001-5,000 | Exact match | 553 contacts → |
“Industrial Staffing | Professional & Skilled Hourly Recruiting | HR Services | Retention Strategies | Outplacement | Greenfield Start Ups & Expansions | Talent Management At HTI…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Group Management Services, INCgroupmgmt.com HQ: Richfield, OH, United StatesReported employees: 501-1,000 | Richfield, OH, United States | 501-1,000 | Exact match | 535 contacts → |
“We provide comprehensive HR solutions to companies of all sizes throughout the United States.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Pacer Groupthepacer.com HQ: Philadelphia, PA, United StatesReported employees: 1,001-5,000 | Philadelphia, PA, United States | 1,001-5,000 | Exact match | 480 contacts → |
“Founded in 2008, PACER is a Minority Woman-owned Global Staffing firm serving Fortune 500 Clients with customized and scalable workforce solutions.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Prismhrprismhr.com HQ: Chandler, AZ, United StatesReported employees: 201-500 | Chandler, AZ, United States | 201-500 | Exact match | 436 contacts → |
“PrismHR creates exceptional software and services, empowering human resource outsourcing service providers such as Professional Employer Organizations (PEOs) and HR outsourcers to…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Frankcrumfrankcrum.com HQ: Clearwater, FL, United StatesReported employees: 201-500 | Clearwater, FL, United States | 201-500 | Exact match | 383 contacts → |
“FrankCrum offers outsourced HR, payroll and payroll administration, employee benefits and benefits administration, 401(k), workers compensation and HR Solutions.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | HKA Enterpriseshkaa.com HQ: Duncan, SC, United StatesReported employees: 1,001-5,000 | Duncan, SC, United States | 1,001-5,000 | Exact match | 382 contacts → |
“One of the most important aspects of any company is its people.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Headway Workforce Solutionsheadwaywfs.com HQ: Raleigh, NC, United StatesReported employees: Not recorded | Raleigh, NC, United States | Not recorded | Exact match | 381 contacts → |
“Headway Workforce Solutions is a leading B2B (Business to Business) provider of HR Administration Outsourcing and Talent Solutions.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Extensishrextensishr.com HQ: Iselin, NJ, United StatesReported employees: 201-500 | Iselin, NJ, United States | 201-500 | Exact match | 353 contacts → |
“ExtensisHR, one of the largest Professional Employer Organizations (PEOs) in the U.S, is looking for talented people to join our team!” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Engage PEOengagepeo.com HQ: Fort Lauderdale, FL, United StatesReported employees: 501-1,000 | Fort Lauderdale, FL, United States | 501-1,000 | Exact match | 341 contacts → |
“Engage PEO delivers comprehensive HR solutions to small and medium-sized businesses, sharpening their competitive advantage.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Nextepnextep.com HQ: Norman, OK, United StatesReported employees: 201-500 | Norman, OK, United States | 201-500 | Exact match | 341 contacts → |
“Most founders don't start a business because they love navigating HR compliance, filing payroll taxes, or negotiating healthcare premiums.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Arch Latamarchlatam.com HQ: Miami, FL, United StatesReported employees: 201-500 | Miami, FL, United States | 201-500 | Exact match | 334 contacts → |
“Somos parte de ARCH Resources Group, un conglomerado líder en el desarrollo de soluciones en Recursos Humanos, con presencia en 12 países del continente.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Intellisourceintellisource.com HQ: Denver, CO, United StatesReported employees: 501-1,000 | Denver, CO, United States | 501-1,000 | Exact match | 332 contacts → |
“IntelliSource continues to redefine the outsourcing space through our breadth of experience, unique personality, and fresh approach to problem-solving, which is integrated into…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 3,857 company matches
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Employee relations outsourcing companies: dataset insights
September 28, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
3,853 records in the displayed employee bands.
4 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 3,857 companies.
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.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
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 28, 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 ↗
Employee relations outsourcing companies by metro
- Employee relations outsourcing companies in New York133
- Employee relations outsourcing companies in Atlanta68
- Employee relations outsourcing companies in Houston62
- Employee relations outsourcing companies in Los Angeles57
- Employee relations outsourcing companies in Chicago49
- Employee relations outsourcing companies in Austin47
- Employee relations outsourcing companies in Miami47
- Employee relations outsourcing companies in San Diego47
- Employee relations outsourcing companies in Dallas41
- Employee relations outsourcing companies in San Francisco39
- Employee relations outsourcing companies in Denver35
- Employee relations outsourcing companies in Phoenix34
- Employee relations outsourcing companies in Tampa33
- Employee relations outsourcing companies in Charlotte31
- Employee relations outsourcing companies in Washington31
- Employee relations outsourcing companies in Orlando29
- Employee relations outsourcing companies in Boston28
- Employee relations outsourcing companies in San Antonio28
Questions about this company list
What does Exact match mean for employee relations 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 employee relations outsourcing companies did RevenueBase find based in the United States?
The saved snapshot records 3,857 matching company records, 156,501 tracked contacts and 52,327 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 28, 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
Employee relations outsourcing companies by geography
- Employee relations outsourcing companies based in Brisbane, Australia
- Employee relations outsourcing companies based in Melbourne, Australia
- Employee relations outsourcing companies based in Perth, Australia
- Employee relations outsourcing companies based in Sydney, Australia
- Employee relations outsourcing companies based in Belo Horizonte, Brazil
- Employee relations outsourcing companies based in Campinas, Brazil
- Employee relations outsourcing companies based in Curitiba, Brazil
- Employee relations outsourcing companies based in Porto Alegre, Brazil
- Employee relations outsourcing companies based in Rio De Janeiro, Brazil
- Employee relations outsourcing companies based in Sao Paulo, Brazil
- Employee relations outsourcing companies based in Calgary, Canada
- Employee relations outsourcing companies based in Edmonton, Canada
Cite this list
RevenueBase Data Team. Top 25 employee relations outsourcing companies based in the United States. Snapshot: September 28, 2026. https://revenuebase.ai/companies/employee-relations-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
- Employee relations outsourcing companies based in Brisbane, Australia
- Employee relations outsourcing companies based in Melbourne, Australia
- Employee relations outsourcing companies based in Perth, Australia
- Employee relations outsourcing companies based in Sydney, Australia
- Employee relations outsourcing companies based in Belo Horizonte, Brazil
- Employee relations outsourcing companies based in Campinas, Brazil