Company lists · Data refreshed September 2026

Top 25 HR and payroll outsourcing companies worldwide

Name: HR and payroll outsourcing companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 22,605 companies tracked

RevenueBase identified 22,605 HR and payroll outsourcing companies worldwide as of September 2026 and tracks 460,168 professional contacts across them, including 112,333 with verified work emails. The United States is the largest market and Mumbai the largest hub.

This list covers HR and payroll outsourcing companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026. Country and city lists for HR and payroll outsourcing companies follow the table.

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

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

22,605Companies

460,168Contacts tracked

112,333Verified emails

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The 25 largest HR and payroll outsourcing companies worldwide

Ranked by team size

Top 25 of 22,605 HR and payroll outsourcing companies worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to HR and payroll outsourcing companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	ADP	Indirect evidence	Roseland, NJ, United StatesHQ checked Sep 21, 2026	10001+	84,166 contacts →
	Indirect evidence “Designing better ways to work through cutting-edge products, premium services and exceptional experiences that enable people to reach their full potential.” Source: RevenueBase Database · checked Sep 21, 2026
2	Paychex	Strong evidence	Rochester, NY, United StatesHQ checked Sep 21, 2026	10001+	17,911 contacts →
	Strong evidence “As the future of work continues to evolve, Paychex leads the way by making complex HR, payroll, and benefits brilliantly simple.” Source: RevenueBase Database · checked Sep 21, 2026
3	SAGE	Indirect evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 21, 2026	10001+	13,063 contacts →
	Indirect evidence “At Sage, we knock down barriers with information, insights, and tools to help your business flow.” Source: RevenueBase Database · checked Sep 21, 2026
4	Insperity	Indirect evidence	Kingwood, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,761 contacts →
	Indirect evidence “Since 1986, Insperity’s mission has been to help businesses succeed so communities prosper.” Source: RevenueBase Database · checked Sep 21, 2026
5	Trinet	Partial evidence	Dublin, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,056 contacts →
	Partial evidence “TriNet (NYSE: TNET) provides small and medium-size businesses (SMBs) with full-service HR solutions tailored by industry.” Source: RevenueBase Database · checked Sep 21, 2026
6	GUSTO	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	3,543 contacts →
	Indirect evidence “Gusto has been growing the small business economy for 15+ years.” Source: RevenueBase Database · checked Sep 21, 2026
7	NGA Human Resources, An Alight Company	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	2,734 contacts →
	Partial evidence “At Alight \| NGA Human Resources our mission is to make HR work better.” Source: RevenueBase Database · checked Sep 21, 2026
8	SD Worx	Partial evidence	Antwerp, BelgiumHQ checked Sep 21, 2026	5,001-10,000	2,561 contacts →
	Partial evidence “SD Worx is your HR, Pay and Time partner in Europe.” Source: RevenueBase Database · checked Sep 21, 2026
9	PT Infomedia Solusi Humanika ISH	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 21, 2026	10001+	2,496 contacts →
	Indirect evidence “PT.” Source: RevenueBase Database · checked Sep 21, 2026
10	Vensure Employer Solutions	Partial evidence	Chandler, AZ, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,437 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
11	BUK	Indirect evidence	Miguel Hidalgo, MexicoHQ checked Sep 21, 2026	1,001-5,000	2,057 contacts →
	Indirect evidence “Un software de recursos humanos para atender todas las necesidades de tus colaboradores.” Source: RevenueBase Database · checked Sep 21, 2026
12	Sopra HR Software	Partial evidence	Courbevoie, FranceHQ checked Sep 21, 2026	1,001-5,000	1,855 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
13	Ciel HR	Partial evidence	Bengaluru, IndiaHQ checked Sep 21, 2026	501-1,000	1,809 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
14	Personio	Partial evidence	Munich, GermanyHQ checked Sep 21, 2026	1,001-5,000	1,786 contacts →
	Partial evidence “Founded in 2015 and built in Europe, Personio is the Intelligent HR Platform championing every side of HR's evolution.” Source: RevenueBase Database · checked Sep 21, 2026
15	Fesco Adecco (外企德科)	Indirect evidence	上海, ChinaHQ checked Sep 21, 2026	1,001-5,000	1,687 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
16	G-P	Partial evidence	Remote First Company, MexicoHQ checked Sep 21, 2026	1,001-5,000	1,621 contacts →
	Partial evidence “G-P is your co-pilot for global employment providing HR, legal and compliance support at your fingertips so you can build teams anywhere.” Source: RevenueBase Database · checked Sep 21, 2026
17	BBSI	Indirect evidence	Vancouver, WA, United StatesHQ checked Sep 21, 2026	501-1,000	1,591 contacts →
	Indirect evidence “We started as a staffing company in 1972, and over the past 50 years, evolved into a Professional Employer Organization or PEO.” Source: RevenueBase Database · checked Sep 21, 2026
18	Justworks	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,554 contacts →
	Indirect evidence “Justworks takes the busyness out of growing a business and alleviates the unknown.” Source: RevenueBase Database · checked Sep 21, 2026
19	Activos Chile	Indirect evidence	Las Condes, ChileHQ checked Sep 21, 2026	5,001-10,000	1,504 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 21, 2026
20	Acerta	Strong evidence	BelgiumHQ checked Sep 21, 2026	1,001-5,000	1,479 contacts →
	Strong evidence “Acerta specializes in offering advice on all HR-related matters concerning Payroll, Social Security Statute, Legal advice and Talent Management.” Source: RevenueBase Database · checked Sep 21, 2026
21	Zellis	Indirect evidence	Bristol, United KingdomHQ checked Sep 21, 2026	1,001-5,000	1,465 contacts →
	Indirect evidence “Zellis helps organisations unlock better outcomes by creating exceptional experiences for their people.” Source: RevenueBase Database · checked Sep 21, 2026
22	Epi-Use	Indirect evidence	SingaporeHQ checked Sep 21, 2026	1,001-5,000	1,385 contacts →
	Indirect evidence “EPI-USE is a member of groupelephant.com, a largely employee-owned group of boutique services firms and software companies, nonprofits and impact investment organizations, with a…” Source: RevenueBase Database · checked Sep 21, 2026
23	SSS	Indirect evidence	Littleton, CO, United StatesHQ checked Sep 21, 2026	n/a	1,376 contacts →
	Indirect evidence “Employee Based Systems (EBS) is a innovative HRMS software development, implementation training, support, and services company specializing in helping companies improve…” Source: RevenueBase Database · checked Sep 21, 2026
24	Buzzworks Business Services Pvt. LTD	Indirect evidence	Chennai, IndiaHQ checked Sep 21, 2026	10001+	1,275 contacts →
	Indirect evidence “With buzzworks, find the right people with the right skills at the right time.” Source: RevenueBase Database · checked Sep 21, 2026
25	I-Process Services I Pvt. LTD	Indirect evidence	IndiaHQ checked Sep 21, 2026	1,001-5,000	1,258 contacts →
	Indirect evidence “i-Process Services (India) Pvt.” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

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

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

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

Showing 25 of 22,605 HR and payroll outsourcing companies worldwide

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HR and payroll outsourcing companies worldwide at a glance

As of Sep 21, 2026

24.4%Verified-email coverage

20.4Average contacts per company

1-10Median size (employees)

1.2%Largest-city concentration · Mumbai

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

12,828

11-50

5,818

51-200

2,120

201-500

777

501-1,000

411

1,001-5,000

393

5,001-10,000

103

10001+

104

Email recency is reported on each country list linked below.

How this list was built

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

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for HR and payroll outsourcing companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “HR and payroll outsourcing companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names HR and payroll outsourcing companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among HR and payroll outsourcing companies, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 112,333 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

HR and payroll outsourcing companies by location

88 lists · largest first

Every HR and payroll outsourcing companies 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 Smart Search?

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

How many HR and payroll outsourcing companies are there worldwide?

RevenueBase identified 22,605 HR and payroll outsourcing companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

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

Which country has the most HR and payroll outsourcing companies?

The United States leads with 3,767 companies, followed by India (3,191) and the United Kingdom (1,146). Every HR and payroll outsourcing companies list by country and city is linked on this page.

Which city has the most HR and payroll outsourcing companies?

Mumbai leads with 273 headquartered companies, followed by Sao Paulo (251) and London (232).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 112,333 verified decision-maker contacts tracked across these 22,605 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 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 Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.