Company lists · Data refreshed September 2026

Top 25 Nonprofit advocacy law firms worldwide

RevenueBase identified 3,675 company matches for nonprofit advocacy law firms worldwide as of September 2026 and tracks 51,435 professional contacts across them, including 26,774 with verified work emails. The United States is the largest market and Washington the largest hub.

This list covers company matches for nonprofit advocacy law 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 29, 2026. Country and city lists for nonprofit advocacy law 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 29, 2026 How this list was built
3,675Companies
51,435Contacts tracked
26,774Verified emails
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The 25 largest nonprofit advocacy law firms worldwide

Ranked by team size
Top 25 of 3,675 company matches for nonprofit advocacy law firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchOrlando, FL, United StatesHQ recorded Sep 29, 20261,001-5,0005,016 contacts →

Exact match

“John Morgan became a lawyer with a simple mission: To fight for the people, and not the powerful.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchColumbia, SC, United StatesHQ recorded Sep 29, 20261,001-5,0002,012 contacts →

Exact match

“Established in 1897, Nelson Mullins is an Am Law 100 firm of more than attorneys, policy advisors and professionals with 33 offices in 17 states and Washington, D.C.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchCincinnati, OH, United StatesHQ recorded Sep 29, 20261,001-5,0001,980 contacts →

Exact match

“At Taft, we work as one team, driven and committed to helping you succeed.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchWashington, DC, United StatesHQ recorded Sep 29, 20261,001-5,0001,790 contacts →

Exact match

“Committed to Your Success – As a law firm of more than 900 professionals, Venable delivers legal services globally in every area of regulatory compliance, government affairs…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchPhiladelphia, PA, United StatesHQ recorded Sep 29, 20261,001-5,0001,682 contacts →

Exact match

“Ballard Spahr LLP, an Am Law 100 law firm with more than 750 lawyers in 19 U.S.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchMelbourne, AustraliaHQ recorded Sep 29, 20261,001-5,0001,099 contacts →

Exact match

“Maurice Blackburn Lawyers is Australia’s leading plaintiff and social justice law firm.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchPhiladelphia, PA, United StatesHQ recorded Sep 29, 2026501-1,000916 contacts →

Exact match

“Inspired People.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchAtlanta, GA, United StatesHQ recorded Sep 29, 2026501-1,000815 contacts →

Exact match

“Established in 1989, Hall Booth Smith, P.C.(HBS) is a full-service law firm with 33 offices across the United States.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9Exact matchBrisbane, AustraliaHQ recorded Sep 29, 2026501-1,000765 contacts →

Exact match

“At Shine, we don't judge you or where you came from.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchU.S., United StatesHQ recorded Sep 29, 2026501-1,000758 contacts →

Exact match

“At Adams & Reese, we take things personally.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 29, 2026501-1,000748 contacts →

Exact match

“Leigh Day is a law firm established to combat injustice.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12Exact matchFlorianopolis, BrazilHQ recorded Sep 29, 2026n/a613 contacts →

Exact match

“Advocacia is a law practice company based out of Av Rio Branco, 441, Florianopolis, Sc, Brazil.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchWashington, DC, United StatesHQ recorded Sep 29, 2026501-1,000576 contacts →

Exact match

“Founded in 1983, Wiley is a dominant presence in the nation’s capital.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchSan Diego, CA, United StatesHQ recorded Sep 29, 2026201-500343 contacts →

Exact match

“This page contains attorney advertising.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15Exact matchHarrisburg, PA, United StatesHQ recorded Sep 29, 2026201-500307 contacts →

Exact match

“Since 1935, McNees Wallace & Nurick has been a trusted, client-focused law firm delivering practical, results-driven legal solutions to businesses, individuals, and organizations.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchBaltimore, MD, United StatesHQ recorded Sep 29, 2026201-500298 contacts →

Exact match

“Maryland Legal Aid (MLA) is a statewide private, nonprofit law firm that provides free, civil legal services to low-income and vulnerable people to address their most fundamental…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17Exact matchGlendale, CA, United StatesHQ recorded Sep 29, 202651-200240 contacts →

Exact match

“Each year Neighborhood Legal Services of Los Angeles County (NLSLA) provides free assistance to more than individuals and families through innovative projects that expand access…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchWashington, DC, United StatesHQ recorded Sep 29, 202651-200236 contacts →

Exact match

“Cohen Milstein Sellers & Toll LLP champions the causes of real people-workers, consumers, small business owners, investors, and whistleblowers-working to deliver corporate reforms…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchWashington, DC, United StatesHQ recorded Sep 29, 202651-200230 contacts →

Exact match

“Keller and Heckman, founded in 1962, has a broad practice in the areas of regulatory law, public policy, and litigation, serving both domestic and international clients.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchModesto, CA, United StatesHQ recorded Sep 29, 2026201-500230 contacts →

Exact match

“California Rural Legal Assistance, Inc.(CRLA) is an anti-poverty law firm that dismantles unjust systems through community lawyering in California’s historically rural areas.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchSeattle, WA, United StatesHQ recorded Sep 29, 2026201-500226 contacts →

Exact match

“As a dynamic statewide law firm, NJP pursues its mission through legal advice and representation, community partnerships, and education to empower clients and combat injustice in…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchLansing, MI, United StatesHQ recorded Sep 29, 2026201-500222 contacts →

Exact match

“Foster Swift has helped businesses, public entities, families, and individuals navigate legal challenges and discover opportunities across Michigan for more than 120 years.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchEdwardsville, IL, United StatesHQ recorded Sep 29, 2026201-500217 contacts →

Exact match

“HeplerBroom LLC is committed to bringing Excellence, Results, and Integrity to everything we do.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchArlington, VA, United StatesHQ recorded Sep 29, 202651-200206 contacts →

Exact match

“Through strategic litigation, training, communication, activism and research, the Institute for Justice advances a rule of law under which individuals can control their destinies…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchPuerto Rico, United StatesHQ recorded Sep 29, 202651-200203 contacts →

Exact match

“For over 50 years, Milberg and its affiliates have been protecting victims’ rights and have recovered over $50 billion for our clients.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 3,675 nonprofit advocacy law firms worldwide

See the full list, filter by size, metro and specialty, and access 26,774 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Nonprofit advocacy law firms worldwide at a glance

As of Sep 29, 2026
52.1%Verified-email coverage
14.0Average contacts per company
1-10Median size (employees)
3.6%Largest-city concentration · Washington
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
2,555
11-50
890
51-200
180
201-500
24
501-1,000
8
1,001-5,000
7
10001+
1

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 nonprofit advocacy law firms are linked below.
What qualifies
Company records worldwide whose business descriptions match “nonprofit advocacy law 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 26,774 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 29, 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.

Nonprofit advocacy law firms by location

23 lists · largest first

Every Nonprofit advocacy law 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 “nonprofit advocacy law firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many nonprofit advocacy law firms are there worldwide?

RevenueBase identified 3,675 company matches for nonprofit advocacy law 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?

Morgan & Morgan, P.A tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most nonprofit advocacy law firms?

The United States leads with 2,050 companies, followed by Brazil (374) and Canada (78). Every nonprofit advocacy law firms list by country and city is linked on this page.

Which city has the most nonprofit advocacy law firms?

Washington leads with 133 company records, followed by New York (83) and Sao Paulo (74).

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 26,774 professional contacts with verified work emails tracked across these 3,675 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 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 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.