Company lists · Data refreshed October 2026

Top 25 Constitutional law firms worldwide

Name: Constitutional law firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 14,219 companies tracked

RevenueBase identified 14,219 company matches for constitutional law firms worldwide as of October 2026 and tracks 125,285 professional contacts across them, including 44,442 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for constitutional 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 October 1, 2026. Country and city lists for constitutional 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 Oct 1, 2026 How this list was built

14,219Companies

125,285Contacts tracked

44,442Verified emails

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The 25 largest constitutional law firms worldwide

Ranked by team size

Top 25 of 14,219 company matches for constitutional law firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Gordon Rees Scully Mansukhani, LLP	Exact match	San Francisco, CA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,846 contacts →
	Exact match “As the only full-service law firm with offices and attorneys in all 50 states, Gordon Rees Scully Mansukhani delivers maximum value to our clients by combining the resources of a…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2	Nelson Mullins Riley & Scarborough	Exact match	Columbia, SC, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,012 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 · Oct 1, 2026 · View company records in RevenueBase
3	Venable LLP	Exact match	Washington, DC, United StatesHQ recorded Oct 1, 2026	1,001-5,000	1,790 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 · Oct 1, 2026 · View company records in RevenueBase
4	Maurice Blackburn Lawyers	Exact match	Melbourne, AustraliaHQ recorded Oct 1, 2026	1,001-5,000	1,099 contacts →
	Exact match “Maurice Blackburn Lawyers is Australia’s leading plaintiff and social justice law firm.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5	ACLU	Exact match	NY, United StatesHQ recorded Oct 1, 2026	501-1,000	1,092 contacts →
	Exact match “The ACLU is an non-profit, non-partisan organization of people who believe in the power of action.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6	Manatt, Phelps & Phillips, LLP	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	501-1,000	1,085 contacts →
	Exact match “Forget everything you thought you knew about professional services firms.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7	Quintairos, Prieto, Wood & Boyer, P.A	Exact match	Miami, FL, United StatesHQ recorded Oct 1, 2026	1,001-5,000	1,068 contacts →
	Exact match “Over the past 25 years, QPWB is one of the fastest-growing law firms in the US.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8	Ernesto Borges Advogados	Exact match	Campo Grande, United StatesHQ recorded Oct 1, 2026	501-1,000	766 contacts →
	Exact match “O escritório Ernesto Borges Advogados iniciou sua trajetória em 1951, na cidade de Cuiabá, Estado do Mato Grosso, com a aposentadoria do então presidente do Tribunal de Justiça, o…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9	Herzog	Exact match	Tel Aviv, IsraelHQ recorded Oct 1, 2026	501-1,000	749 contacts →
	Exact match “Herzog Fox & Neeman is Israel’s largest law firm and has earned a reputation as market leader, evidenced by consistent top-tier rankings in both international and Israeli legal…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10	Leigh DAY	Exact match	London, United KingdomHQ recorded Oct 1, 2026	501-1,000	748 contacts →
	Exact match “Leigh Day is a law firm established to combat injustice.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11	Kelley Drye & Warren LLP	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	501-1,000	690 contacts →
	Exact match “Kelley Drye is an AmLaw 200 law firm of more than 350 lawyers and other professionals practicing in New York, NY; Washington, D.C; Chicago, IL; Houston, TX, Los Angeles, CA; San…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12	Grayrobinson, P.A	Exact match	Orlando, FL, United StatesHQ recorded Oct 1, 2026	501-1,000	672 contacts →
	Exact match “GrayRobinson is a multidimensional team of attorneys, advisors, and consultants recognized as one of the most influential firms in Florida.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13	Honigman LLP	Exact match	Detroit, MI, United StatesHQ recorded Oct 1, 2026	501-1,000	669 contacts →
	Exact match “Honigman LLP is an Am Law 200 full-service, general business law firm with more than 400 attorneys counseling clients on complex issues across the country in Chicago, Michigan…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14	Legalwise	Exact match	Rooderpoort, South AfricaHQ recorded Oct 1, 2026	201-500	619 contacts →
	Exact match “In 1984, we started with a single-minded purpose: to empower people with access to justice to enforce and defend their rights.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15	Advocacia	Exact match	Florianopolis, BrazilHQ recorded Oct 1, 2026	n/a	613 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 · Oct 1, 2026 · View company records in RevenueBase
16	Wiley Rein LLP	Exact match	Washington, DC, United StatesHQ recorded Oct 1, 2026	501-1,000	576 contacts →
	Exact match “Founded in 1983, Wiley is a dominant presence in the nation’s capital.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17	STBB	Exact match	Cape Town, South AfricaHQ recorded Oct 1, 2026	501-1,000	531 contacts →
	Exact match “STBB is one of the largest law firms in South Africa and offers a wide range of legal services from its 13 offices.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18	Gunster	Exact match	West Palm Beach, FL, United StatesHQ recorded Oct 1, 2026	501-1,000	530 contacts →
	Exact match “Gunster, Florida’s law firm for leaders, provides full-service legal counsel to leading organizations and individuals from its 13 offices statewide.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19	Munger, Tolles & Olson LLP	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	201-500	521 contacts →
	Exact match “Munger, Tolles & Olson is a 200-lawyer firm based in Los Angeles with a national practice representing clients in a broad range of complex and high-profile matters.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20	Marcelo Tostes Advogados	Exact match	Sao Paulo, BrazilHQ recorded Oct 1, 2026	201-500	518 contacts →
	Exact match “Fundado em o Marcelo Tostes Advogados firmou-se como um escritório de advocacia empresarial de excelência.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21	The United Firm LA Liga Defensora, APC	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	518 contacts →
	Exact match “The United Firm \| La Liga Defensora, A.P.C.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22	Kelley Kronenberg	Exact match	Fort Lauderdale, FL, United StatesHQ recorded Oct 1, 2026	501-1,000	484 contacts →
	Exact match “Founded in 1980, Kelley Kronenberg is an award-winning, multi-practice national law firm with over 520 employees, more than 240 attorneys, and 19 locations throughout Florida and…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23	Tortoro, Madureira & Ragazzi Advogados	Exact match	São Paulo, BrazilHQ recorded Oct 1, 2026	201-500	480 contacts →
	Exact match “Somos um escritório focado no direito empresarial, destacando-se nas áreas Cível, Recuperação de Crédito, Trabalhista, Consumidor, Administrativo, Societário e Contratos…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24	Lerners LLP	Exact match	London, ON, CanadaHQ recorded Oct 1, 2026	201-500	450 contacts →
	Exact match “Lerners LLP is a full service law firm that has grown to become one of Ontario’s largest firms.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
25	Dickie, Mccamey & Chilcote	Exact match	Pittsburgh, PA, United StatesHQ recorded Oct 1, 2026	201-500	400 contacts →
	Exact match “21 Offices \| 11 States \| 1 Firm Dickie, McCamey & Chilcote, P.C.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “constitutional law firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 14,219 constitutional law firms worldwide

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Constitutional law firms worldwide at a glance

As of Oct 1, 2026

35.5%Verified-email coverage

8.8Average contacts per company

1-10Median size (employees)

4.3%Largest-city concentration · Sao Paulo

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

9,917

11-50

3,612

51-200

489

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

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 constitutional law firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “constitutional 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 44,442 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 October 1, 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.

Constitutional law firms by location

73 lists · largest first

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

How many constitutional law firms are there worldwide?

RevenueBase identified 14,219 company matches for constitutional law firms worldwide as of October 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?

Gordon Rees Scully Mansukhani, LLP tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most constitutional law firms?

The United States leads with 3,325 companies, followed by Brazil (2,475) and India (541). Every constitutional law firms list by country and city is linked on this page.

Which city has the most constitutional law firms?

Sao Paulo leads with 612 company records, followed by Rio De Janeiro (214) and Madrid (147).

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 44,442 professional contacts with verified work emails tracked across these 14,219 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 October 1, 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.