Company lists · Data refreshed September 2026

Top 25 Labor union consulting firms worldwide

Name: Labor union consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 4,207 companies tracked

RevenueBase identified 4,207 labor union consulting firms worldwide as of September 2026 and tracks 32,292 professional contacts across them, including 9,986 with verified work emails. Italy is the largest market and Sao Paulo the largest hub.

This list covers labor union consulting 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 28, 2026. Country and city lists for labor union consulting 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

4,207Companies

32,292Contacts tracked

9,986Verified emails

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The 25 largest labor union consulting firms worldwide

Ranked by team size

Top 25 of 4,207 labor union consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to labor union consulting firms: 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	Littler	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,555 contacts →
	Partial evidence “Littler is the largest global employment and labor law practice, representing management in all aspects of employment and labor law and serving as a single-source solution…” Source: RevenueBase Database · checked Sep 28, 2026
2	Jackson Lewis P.C	Partial evidence	New York, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,285 contacts →
	Partial 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 28, 2026
3	Core Integra Consulting Services LTD	Indirect evidence	Andheri (east), IndiaHQ checked Sep 28, 2026	501-1,000	582 contacts →
	Indirect evidence “Core Integra offers unique value propositions including customized solutions to its clients using a combination of subject matter expertise, lean processes, and disruptive…” Source: RevenueBase Database · checked Sep 28, 2026
4	Workmate	Indirect evidence	Santiago, ChileHQ checked Sep 28, 2026	501-1,000	504 contacts →
	Indirect evidence “Somos un holding con más de 25 años de experiencia como consultores especializados en materias de servicios laborales y logística.” Source: RevenueBase Database · checked Sep 28, 2026
5	Demarco	Partial evidence	Belo Horizonte, BrazilHQ checked Sep 28, 2026	201-500	452 contacts →
	Partial evidence “Since 2004, we have helped companies solve their challenges in People, Management, Security and Trade Union Relations, delivering world-class results.” Source: RevenueBase Database · checked Sep 28, 2026
6	Constangy	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	201-500	429 contacts →
	Indirect evidence “Constangy, Brooks, Smith & Prophete has more than 250 attorneys across 21 states and the District of Columbia, offering services including the defense of single and…” Source: RevenueBase Database · checked Sep 28, 2026
7	TMT	Indirect evidence	Tokyo, JapanHQ checked Sep 28, 2026	n/a	412 contacts →
	Indirect evidence “TMT, Inc.” Source: RevenueBase Database · checked Sep 28, 2026
8	Secafi	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	501-1,000	390 contacts →
	Indirect evidence “Secafi est spécialisé dans l'expertise, l'assistance et le conseil auprès des Instances Représentatives du Personnel : comité d'entreprise, comité de groupe, CHSCT, comité…” Source: RevenueBase Database · checked Sep 28, 2026
9	Pipek Advogados	Indirect evidence	São Paulo, BrazilHQ checked Sep 28, 2026	201-500	299 contacts →
	Indirect evidence “Referência nacional em Direito do Trabalho Em dez anos de atividades, o escritório Pipek, Penteado e Paes Manso Advogados Associados, já se tornou uma das principais referências…” Source: RevenueBase Database · checked Sep 28, 2026
10	Studio Commerciale Associato	Indirect evidence	ItalyHQ checked Sep 28, 2026	n/a	191 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
11	Outten & Golden LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	51-200	150 contacts →
	Indirect evidence “Outten & Golden is a nationally recognized law firm for employees.” Source: RevenueBase Database · checked Sep 28, 2026
12	Vinatea & Toyama	Indirect evidence	Lima, PeruHQ checked Sep 28, 2026	51-200	150 contacts →
	Indirect evidence “Vinatea & Toyama es la firma de práctica especializada en derecho laboral y empleo más grande del Perú, reconocida por manejar los asuntos más complejos, sensibles y estratégicos…” Source: RevenueBase Database · checked Sep 28, 2026
13	Professional Services - Proserv	Partial evidence	Cairo, EgyptHQ checked Sep 28, 2026	1,001-5,000	147 contacts →
	Partial evidence “is a company specializing in consulting and providing business solutions in the fields of human resource management and business solutions to all segments of corporate and…” Source: RevenueBase Database · checked Sep 28, 2026
14	Koskie Minsky LLP	Partial evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	51-200	136 contacts →
	Partial evidence “Koskie Minsky is widely acknowledged as one of Canada’s pre-eminent firms in the areas of union side labour law, civil litigation, class actions, and pension and benefits.” Source: RevenueBase Database · checked Sep 28, 2026
15	Martenson, Hasbrouck & Simon LLP	Indirect evidence	Brookhaven, GA, United StatesHQ checked Sep 28, 2026	51-200	119 contacts →
	Indirect evidence “Martenson, Hasbrouck & Simon LLP is headquartered in Atlanta, with offices in Carlsbad, Chicago, Dallas, New York, and Sacramento, making us geographically and strategically…” Source: RevenueBase Database · checked Sep 28, 2026
16	Actance Avocats	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	109 contacts →
	Indirect evidence “Actance Avocats dédiés au Droit Social : actance est né d’une vision commune : le droit du travail trouve sa place parmi les préoccupations essentielles de l’entreprise et permet…” Source: RevenueBase Database · checked Sep 28, 2026
17	Maillard Abogados Laborales	Indirect evidence	Ciudad De México, MexicoHQ checked Sep 28, 2026	201-500	103 contacts →
	Indirect evidence “Somos la firma líder en estrategias empresariales de consultoría jurídica especializada en derecho laboral fundada en 1983.” Source: RevenueBase Database · checked Sep 28, 2026
18	Virvelle	Indirect evidence	Salerno, ItalyHQ checked Sep 28, 2026	11-50	98 contacts →
	Indirect evidence “Siamo una società di consulenza e formazione e, dal 2015, operiamo anche come agenzia per il lavoro.” Source: RevenueBase Database · checked Sep 28, 2026
19	Sartori Sociedade DE Advogados	Indirect evidence	Campinas, BrazilHQ checked Sep 28, 2026	51-200	96 contacts →
	Indirect evidence “O escritório, fundado em 1993, nasceu em Campinas/SP como a primeira terceirização de serviços da Robert Bosch Ltda, após o Dr.” Source: RevenueBase Database · checked Sep 28, 2026
20	Marván, González Graf Y González Larrazolo, S.C	Indirect evidence	Ciudad De México, MexicoHQ checked Sep 28, 2026	51-200	96 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
21	People Results	Indirect evidence	Troy, MI, United StatesHQ checked Sep 28, 2026	51-200	87 contacts →
	Indirect evidence “People Results is an experienced team of consultants who collaborate, innovate, and anticipate mission-critical challenges and deliver impactful business results.” Source: RevenueBase Database · checked Sep 28, 2026
22	Alphaconsult-Gruppe	Indirect evidence	Nuremberg, GermanyHQ checked Sep 28, 2026	5,001-10,000	87 contacts →
	Indirect evidence “1982 als modernes Beratungsunternehmen mit Schwerpunkt Personalmanagement in Nürnberg gegründet, kann unsere Unternehmensgruppe als eigenfinanzierter Familienbetrieb unter der…” Source: RevenueBase Database · checked Sep 28, 2026
23	Sextant Expertise	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	85 contacts →
	Indirect evidence “Expert-comptable depuis 1996 aux côtés des représentants des salariés et des organisations syndicales, et formateur agréé CSE.” Source: RevenueBase Database · checked Sep 28, 2026
24	Curonova	Partial evidence	Stockholm, SwedenHQ checked Sep 28, 2026	51-200	84 contacts →
	Partial evidence “Curonova Consulting AB stöttar individ, fack, kommuner, och företag i förändring, genom omställningsuppdrag och karriärväxling för kollektivanställda, tjänstemän och chefer.” Source: RevenueBase Database · checked Sep 28, 2026
25	Willig, Williams & Davidson	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	51-200	80 contacts →
	Strong evidence “Willig, Williams & Davidson is one of the largest and most respected union-side labor law firms in the United States.” Source: RevenueBase Database · checked Sep 28, 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: labor union consulting 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 labor union consulting firms.
Partial evidence: Its own public description names part of labor union consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name labor union consulting 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 4,207 labor union consulting firms worldwide

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Labor union consulting firms worldwide at a glance

As of Sep 28, 2026

30.9%Verified-email coverage

7.7Average contacts per company

1-10Median size (employees)

4.9%Largest-city concentration · Sao Paulo

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

2,912

11-50

1,075

51-200

145

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 labor union consulting 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 labor union consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “labor union consulting 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 labor union consulting 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 labor union consulting 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, 9,986 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 28, 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.

Labor union consulting firms by location

23 lists · largest first

Every Labor union consulting 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 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 labor union consulting 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 labor union consulting firms are there worldwide?

RevenueBase identified 4,207 labor union consulting 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?

Littler, headquartered in San Francisco, tops this list with the largest team on record.

Which country has the most labor union consulting firms?

Italy leads with 729 companies, followed by Brazil (728) and Spain (512). Every labor union consulting firms list by country and city is linked on this page.

Which city has the most labor union consulting firms?

Sao Paulo leads with 208 headquartered companies, followed by Paris (79) and Madrid (69).

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 9,986 verified decision-maker contacts tracked across these 4,207 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 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 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.