Company lists · Data refreshed September 2026
Top 25 Worker advocacy groups worldwide
RevenueBase identified 675 worker advocacy groups worldwide as of September 2026 and tracks 11,527 professional contacts across them, including 3,291 with verified work emails. The United States is the largest market and New York the largest hub.
This list covers worker advocacy groups 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 22, 2026. Country and city lists for worker advocacy groups 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 worker advocacy groups worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,406 contacts → | ||||
Partial evidence “We are the Service Employees International Union, an organization of 2-million members united by the belief in the dignity and worth of workers and the services they provide and…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,029 contacts → | ||||
Partial evidence “Unite is Britain's biggest union with 1.5 million members in every type of workplace Unite is the union for the 21st century.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 3 | 778 contacts → | ||||
Indirect evidence “De naam Vakmensen zegt het al.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 4 | 685 contacts → | ||||
Partial evidence “GMB is a trade union that represents all workers.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 5 | 420 contacts → | ||||
Partial evidence “The AFL-CIO represents people who work.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 6 | 342 contacts → | ||||
Indirect evidence “Fagforbundet er landets største arbeidstakerorganisasjon med 400 medlemmer og er en del av LO.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 7 | 334 contacts → | ||||
Partial evidence “Working America unites working people who don’t have a union on the job.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 8 | 245 contacts → | ||||
Partial evidence “Our union is workers across the country from more than 45 industries and all walks of life, standing together to make a difference.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 9 | 198 contacts → | ||||
Strong evidence “The Solidarity Center stands with workers everywhere fighting for fair wages, safe workplaces and fundamental freedoms – when workers have the knowledge and support to advocate…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 10 | 195 contacts → | ||||
Partial evidence “The National Domestic Workers Alliance NDWA) organizes domestic workers in the United States for respect, recognition and labor standards.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 11 | 150 contacts → | ||||
Indirect evidence “Outten & Golden is a nationally recognized law firm for employees.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 12 | 131 contacts → | ||||
Partial evidence “The SDA is the union for workers in retail, warehousing and fast food.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 13 | 110 contacts → | ||||
Partial evidence “Verité is a global, nonprofit organization with a mission to ensure that people worldwide work under safe, fair, and legal conditions.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 14 | 100 contacts → | ||||
Partial evidence “HKM is a national employment law firm that represents individuals and workers in all aspects of employment law.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 15 | 88 contacts → | ||||
Indirect evidence “Conhecer os seus direitos trabalhistas é a melhor maneira de identificar quando forem desrespeitados.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 16 | 80 contacts → | ||||
Indirect 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 22, 2026Thanks. The Data Team will review it. | |||||
| 17 | 77 contacts → | ||||
Partial evidence “Members of UNITE HERE Local 11 join together to fight for improved living standards and working conditions.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 18 | 71 contacts → | ||||
Strong evidence “Legal Aid at Work promotes the rights and economic self-sufficiency of low-wage workers and marginalized communities through free legal services, education, and advocacy at the…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 19 | 70 contacts → | ||||
Partial evidence “At Jobs With Justice, we are leading the fight for workers’ rights and an economy that benefits everyone.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 20 | 67 contacts → | ||||
Partial evidence “Since our founding in 1969, the National Employment Law Project has fought to secure the rights of workers and unemployed people across the country.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 21 | 58 contacts → | ||||
Indirect evidence “Du findest mehr Infos zur Gewerkschaft GPA auf diesen Kanälen: https://twitter.com/gewerkschaftgpa” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 22 | 51 contacts → | ||||
Indirect evidence “Employee Justice Legal Group, PC is a California based law firm, with headquarters in Los Angeles, CA and offices in Orange County and San Diego as well.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 23 | 51 contacts → | ||||
Indirect evidence “Since our founding in 1995, we’ve been pioneering policy campaigns that are then adopted across the nation, from the groundbreaking Children’s Health Initiative, to raising the…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 24 | 49 contacts → | ||||
Indirect evidence “The American legal system is in a constant state of change.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 25 | 42 contacts → | ||||
Indirect evidence “For confidence and safety in the marketplace.” Source: RevenueBase Database · checked Sep 22, 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: worker advocacy groups. 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 worker advocacy groups.
- Partial evidence
- Its own public description names part of worker advocacy groups, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name worker advocacy groups. 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 675 worker advocacy groups worldwide
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Worker advocacy groups worldwide at a glance
As of Sep 22, 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 worker advocacy groups, 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 worker advocacy groups are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “worker advocacy groups”. 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 worker advocacy groups), 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 worker advocacy groups, 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, 3,291 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 22, 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.
Worker advocacy groups by location
2 lists · largest firstEvery Worker advocacy groups list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 worker advocacy groups, 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 worker advocacy groups are there worldwide?
RevenueBase identified 675 worker advocacy groups 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?
SEIU, headquartered in Washington, tops this list with the largest team on record.
Which country has the most worker advocacy groups?
The United States leads with 294 companies, followed by Brazil (107). Every worker advocacy groups list by country and city is linked on this page.
Which city has the most worker advocacy groups?
New York leads with 24 headquartered companies, followed by Washington (23) and Los Angeles (21).
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 3,291 verified decision-maker contacts tracked across these 675 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 22, 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.