Company lists · Data refreshed September 2026

Top 25 Human resources outsourcing firms worldwide

Name: Human resources outsourcing firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 40,569 companies tracked

RevenueBase identified 40,569 company matches for human resources outsourcing firms worldwide as of September 2026 and tracks 664,217 professional contacts across them, including 120,656 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for human resources outsourcing firms worldwide, 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. Country and city lists for human resources outsourcing firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built

40,569Companies

664,217Contacts tracked

120,656Verified emails

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The 25 largest human resources outsourcing firms worldwide

Ranked by team size

Top 25 of 40,569 company matches for human resources outsourcing firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	ADP	Exact match	Roseland, NJ, United StatesHQ recorded Sep 28, 2026	10001+	84,166 contacts →
	Exact match “Designing better ways to work through cutting-edge products, premium services and exceptional experiences that enable people to reach their full potential.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Paychex	Exact match	Rochester, NY, United StatesHQ recorded Sep 28, 2026	10001+	17,911 contacts →
	Exact match “As the future of work continues to evolve, Paychex leads the way by making complex HR, payroll, and benefits brilliantly simple.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	LHH	Exact match	Jacksonville, FL, United StatesHQ recorded Sep 28, 2026	10001+	12,889 contacts →
	Exact match “At LHH, we believe work should be meaningful, fulfilling, and connected.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Randstad USA	Exact match	Atlanta, GA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	8,522 contacts →
	Exact match “Randstad North America, Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Insperity	Exact match	Kingwood, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	4,761 contacts →
	Exact match “Since 1986, Insperity’s mission has been to help businesses succeed so communities prosper.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Trinet	Exact match	Dublin, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	4,056 contacts →
	Exact match “TriNet (NYSE: TNET) provides small and medium-size businesses (SMBs) with full-service HR solutions tailored by industry.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	PSG Global Solutions	Exact match	Marina Del Rey, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	4,000 contacts →
	Exact match “PSG is a global leader in recruitment process optimization, delivering high-performance outsourced recruiting solutions that drive real business results.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	GUSTO	Exact match	San Francisco, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	3,543 contacts →
	Exact match “Gusto has been growing the small business economy for 15+ years.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Randstad India	Exact match	Chennai, IndiaHQ recorded Sep 28, 2026	1,001-5,000	3,145 contacts →
	Exact match “Randstad is the world’s largest talent company and a partner of choice to clients.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Randstad España	Exact match	Madrid, SpainHQ recorded Sep 28, 2026	1,001-5,000	3,083 contacts →
	Exact match “Randstad es la empresa líder en España en soluciones de Recursos Humanos, haciendo posible que cada día personas en nuestro país tengan un empleo.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Allegis Global Solutions	Exact match	Hanover, MD, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,866 contacts →
	Exact match “At Allegis Global Solutions (AGS), we’re in the human enterprise business.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	NGA Human Resources, An Alight Company	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1,001-5,000	2,734 contacts →
	Exact match “At Alight \| NGA Human Resources our mission is to make HR work better.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	SD Worx	Exact match	Antwerp, BelgiumHQ recorded Sep 28, 2026	5,001-10,000	2,561 contacts →
	Exact match “SD Worx is your HR, Pay and Time partner in Europe.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	HR Path	Exact match	Paris La Défense, GermanyHQ recorded Sep 28, 2026	1,001-5,000	2,324 contacts →
	Exact match “HR Path, an expert, and a major player in Human Resources, helps companies for who the human experience is essential to their digital transformation.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	PT Danamas Insan Kreasi Andalan Dika	Exact match	Jakarta Pusat, IndonesiaHQ recorded Sep 28, 2026	1,001-5,000	2,036 contacts →
	Exact match “PT Danamas Insan Kreasi Andalan (DIKA) adalah solusi outsourcing terpercaya untuk membantu bisnis Anda tumbuh lebih cepat dan efisien.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Sopra HR Software	Exact match	Courbevoie, FranceHQ recorded Sep 28, 2026	1,001-5,000	1,855 contacts →
	Exact match “Sopra HR Software, leader en solutions et services pour la paie et les RH, répond aux enjeux des Directions des Ressources Humaines des organisations de moyennes et grandes…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Ciel HR	Exact match	Bengaluru, IndiaHQ recorded Sep 28, 2026	501-1,000	1,809 contacts →
	Exact match “CIEL HR is the only company in India which provides a comprehensive suite of technology-driven human resources solutions across the entire human resource chain and impacts every…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Synergie Italia	Exact match	Torino, ItalyHQ recorded Sep 28, 2026	501-1,000	1,748 contacts →
	Exact match “L’Italia è piena di talenti: il nostro lavoro è riconoscerli!” Synergie Italia S.p.A.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	GI Group Holding	Exact match	Milan, ItalyHQ recorded Sep 28, 2026	5,001-10,000	1,717 contacts →
	Exact match “Gi Group Holding is a global ecosystem of integrated HR Services that aims at evolving the Labour Market by creating sustainable, social and economical value, emphasising the…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Global Empregos Ltda	Exact match	Santo André, BrazilHQ recorded Sep 28, 2026	n/a	1,695 contacts →
	Exact match “Durante os anos 80, o mundo testemunhou o surgimento de uma nova ordem.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Fesco Adecco (外企德科)	Exact match	上海, ChinaHQ recorded Sep 28, 2026	1,001-5,000	1,687 contacts →
	Exact match “FESCO Adecco is a joint-venture human resources services company combining the strengths of FESCO Group (a China 500 Company and the first Chinese company in the human resources…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	51job	Exact match	Pudong District, ChinaHQ recorded Sep 28, 2026	5,001-10,000	1,675 contacts →
	Exact match “51job (Nasdaq:JOBS) is a leading human resource solutions provider in China, offering a broad array of services in the areas of recruitment solutions, training and assessment, and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Eurofirms Group People First	Exact match	Cassá De La Selva, SpainHQ recorded Sep 28, 2026	1,001-5,000	1,545 contacts →
	Exact match “Eurofirms Group is Spain's first talent management multinational.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Activos Chile	Exact match	Las Condes, ChileHQ recorded Sep 28, 2026	5,001-10,000	1,504 contacts →
	Exact match “Somos una empresa especializada en entregar servicios integrados en el sector de recursos humanos comprometida con los procesos y necesidades de cada uno de nuestros clientes.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Zellis	Exact match	Bristol, United KingdomHQ recorded Sep 28, 2026	1,001-5,000	1,465 contacts →
	Exact match “Zellis helps organisations unlock better outcomes by creating exceptional experiences for their people.” 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 “human resources outsourcing firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 40,569 human resources outsourcing firms worldwide

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Human resources outsourcing firms worldwide at a glance

As of Sep 28, 2026

18.2%Verified-email coverage

16.4Average contacts per company

1-10Median size (employees)

1.5%Largest-city concentration · Sao Paulo

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

24,812

11-50

9,625

51-200

3,287

201-500

1,236

501-1,000

614

1,001-5,000

631

5,001-10,000

148

10001+

142

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for human resources outsourcing firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “human resources outsourcing firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. 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 120,656 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.

Human resources outsourcing firms by location

170 lists · largest first

Every Human resources outsourcing firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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

How many human resources outsourcing firms are there worldwide?

RevenueBase identified 40,569 company matches for human resources outsourcing firms worldwide 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 country has the most human resources outsourcing firms?

The United States leads with 5,599 companies, followed by India (5,148) and Brazil (2,662). Every human resources outsourcing firms list by country and city is linked on this page.

Which city has the most human resources outsourcing firms?

Sao Paulo leads with 603 company records, followed by Mumbai (470) and London (371).

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 120,656 professional contacts with verified work emails tracked across these 40,569 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.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.