Company lists · Data refreshed September 2026
Top 25 Professional employer organizations for law firms worldwide
RevenueBase identified 3,196 professional employer organizations for law firms worldwide as of September 2026 and tracks 51,777 professional contacts across them, including 22,832 with verified work emails. The United States is the largest market and New York the largest hub.
This list covers professional employer organizations for law firms 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 29, 2026. Country and city lists for professional employer organizations for law firms 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.
The 25 largest professional employer organizations for law firms worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,708 contacts → | ||||
Strong evidence “Ogletree Deakins is one of the largest labor and employment law firms representing management in all types of employment-related legal matters.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,449 contacts → | ||||
Indirect evidence “At Alston & Bird, a leading international firm, our people trust the people they work for, take pride in what they do, enjoy the people they work with and serve the communities in…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 2,285 contacts → | ||||
Strong evidence “Focused on employment and labor law since 1958, Jackson Lewis P.C.’s attorneys located in major cities nationwide consistently identify and respond to new ways workplace law…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,591 contacts → | ||||
Strong 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 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,554 contacts → | ||||
Indirect evidence “Justworks takes the busyness out of growing a business and alleviates the unknown.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,471 contacts → | ||||
Partial evidence “With hundreds of attorneys across the globe, Fisher Phillips advises and advocates for employers internationally on some of the most complex and high-profile workplace matters.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 1,343 contacts → | ||||
Indirect evidence “At Clark Hill, our value proposition is simple.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 1,068 contacts → | ||||
Partial evidence “Over the past 25 years, QPWB is one of the fastest-growing law firms in the US.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 840 contacts → | ||||
Indirect evidence “Managing HR, payroll, benefits, and compliance can stretch your team thin, and mistakes are costly.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 828 contacts → | ||||
Strong evidence “Oasis, A Paychex Company, is a leading Professional Employer Organization (PEO).” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 802 contacts → | ||||
Partial evidence “Aderant is dedicated to helping law firms run a better business.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 746 contacts → | ||||
Strong evidence “FordHarrison LLP - your partner in employment law.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 586 contacts → | ||||
Indirect evidence “CoAdvantage is now CoAd.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 490 contacts → | ||||
Partial evidence “ITG is the leading company for employer of record services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 486 contacts → | ||||
Indirect evidence “We help legal leaders build teams their businesses love – strategic, responsive and ready for anything.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 353 contacts → | ||||
Strong evidence “ExtensisHR, one of the largest Professional Employer Organizations (PEOs) in the U.S, is looking for talented people to join our team!” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 341 contacts → | ||||
Indirect evidence “Engage PEO delivers comprehensive HR solutions to small and medium-sized businesses, sharpening their competitive advantage.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 341 contacts → | ||||
Indirect evidence “Most founders don't start a business because they love navigating HR compliance, filing payroll taxes, or negotiating healthcare premiums.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 283 contacts → | ||||
Strong evidence “At Employer Flexible, we’re a Professional Employer Organization (PEO) that helps businesses simplify HR, payroll, benefits, risk management, and compliance, so you can focus on…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 279 contacts → | ||||
Indirect evidence “Outsourcing HR through a PEO is a strong option for growing businesses.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 264 contacts → | ||||
Partial evidence “PrestigePEO empowers small and mid-sized businesses (SMBs) to simplify HR by offering end-to-end support for employee benefits management, payroll administration, workers’…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 258 contacts → | ||||
Indirect evidence “Zenefits is a part of TriNet.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 255 contacts → | ||||
Indirect evidence “Um dos maiores e mais tradicionais escritórios de advocacia do país, o Olimpio de Azevedo Advogados é responsável pelo patrocínio de um número superior a 50 mil demandas, tendo…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 238 contacts → | ||||
Strong evidence “Koley Jessen is a strategically growing law firm serving the needs of businesses and their owners, executives, and professionals in Nebraska and around the country.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
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: professional employer organizations for law firms. 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 professional employer organizations for law firms.
- Partial evidence
- Its own public description names part of professional employer organizations for law firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name professional employer organizations for law firms. 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 3,196 professional employer organizations for law firms worldwide
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Professional employer organizations for law firms worldwide at a glance
As of Sep 29, 2026Companies by employee count
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 professional employer organizations for law firms, 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 professional employer organizations for law firms are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “professional employer organizations for law firms”. 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 professional employer organizations for law firms), 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 professional employer organizations for law firms, 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, 22,832 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 29, 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.
Professional employer organizations for law firms by location
22 lists · largest firstEvery Professional employer organizations for law firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Professional employer organizations for law firms based in the United States1,321
- Professional employer organizations for law firms based in Brazil218
- Professional employer organizations for law firms based in Italy179
- Professional employer organizations for law firms based in France118
- Professional employer organizations for law firms based in Spain97
- Professional employer organizations for law firms based in the Netherlands95
- Professional employer organizations for law firms based in the United Kingdom95
- Professional employer organizations for law firms based in Germany94
- Professional employer organizations for law firms based in India76
- Professional employer organizations for law firms based in Canada73
- Professional employer organizations for law firms based in Mexico48
- Professional employer organizations for law firms based in Poland48
Cities
- Professional employer organizations for law firms based in New York, United States80
- Professional employer organizations for law firms based in Sao Paulo, Brazil64
- Professional employer organizations for law firms based in Paris, France50
- Professional employer organizations for law firms based in London, United Kingdom42
- Professional employer organizations for law firms based in Los Angeles, United States42
- Professional employer organizations for law firms based in Tampa, United States32
- Professional employer organizations for law firms based in Atlanta, United States30
- Professional employer organizations for law firms based in Toronto, Canada30
- Professional employer organizations for law firms based in Dallas, United States28
- Professional employer organizations for law firms based in Houston, United States27
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 professional employer organizations for law firms, 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 professional employer organizations for law firms are there worldwide?
RevenueBase identified 3,196 professional employer organizations for law firms 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?
Ogletree Deakins, headquartered in Atlanta, tops this list with the largest team on record.
Which country has the most professional employer organizations for law firms?
The United States leads with 1,321 companies, followed by Brazil (218) and Italy (179). Every professional employer organizations for law firms list by country and city is linked on this page.
Which city has the most professional employer organizations for law firms?
New York leads with 80 headquartered companies, followed by Sao Paulo (64) and Paris (50).
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 22,832 verified decision-maker contacts tracked across these 3,196 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 29, 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.