Company lists · Data refreshed September 2026

Top 25 Dual citizenship law firms worldwide

RevenueBase identified 1,474 company matches for dual citizenship law firms worldwide as of September 2026 and tracks 7,710 professional contacts across them, including 2,178 with verified work emails. The United States is the largest market and Madrid the largest hub.

This list covers company matches for dual citizenship 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 28, 2026. Country and city lists for dual citizenship 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 28, 2026 How this list was built
1,474Companies
7,710Contacts tracked
2,178Verified emails
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The 25 largest dual citizenship law firms worldwide

Ranked by team size
Top 25 of 1,474 company matches for dual citizenship law firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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 matchÁguas Claras, BrazilHQ recorded Sep 28, 2026201-500312 contacts →

Exact match

“A Cidadania4u é a maior empresa de especialistas em processos de reconhecimento de cidadania italiana, portuguesa e alemã do Brasil.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchRio De Janeiro, BrazilHQ recorded Sep 28, 202651-200201 contacts →

Exact match

“Somos uma empresa de assessoria que busca auxiliar na etapa documental os descendentes de portugueses e italianos a adquirirem a Dupla Cidadania.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchRiverside, CA, United StatesHQ recorded Sep 28, 2026201-500137 contacts →

Exact match

“ICA provide assistance throughout the dual italian/US citizenship process to individuals and families”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchAmman, JordanHQ recorded Sep 28, 202651-200121 contacts →

Exact match

“Reach Immigration was established in the capital of Jordan, Amman, in Since its establishment, it has been one of the region’s market leaders in providing legal advice related to…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchCaxias Do Sul, BrazilHQ recorded Sep 28, 202651-20093 contacts →

Exact match

“NOSSO COMPROMISSO É COM O SEU DIREITO DE SER O Gruppo Nostrali nasce para atender, orientar e assessorar os cidadãos italianos e portugueses e seus descendentes, com equipe…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchSevilla, SpainHQ recorded Sep 28, 202651-20076 contacts →

Exact match

“Especialistas en Derecho migratorio y Derecho genealogista.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchDubai, United Arab EmiratesHQ recorded Sep 28, 202611-5068 contacts →

Exact match

“BAYAT Legal Services is a boutique law firm established in the UAE in 1993 by Quebec-bar lawyer SAM BAYAT.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-20063 contacts →

Exact match

“UK and US Immigration lawyers with offices in London and New York, regarded as a “stellar” boutique immigration firm with a powerful transatlantic capability.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchDubai, United Arab EmiratesHQ recorded Sep 28, 202651-20060 contacts →

Exact match

“Ace Luxury Immigration Solutions provides you with the most extensive Business Immigration ideas.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchMontreal, QC, CanadaHQ recorded Sep 28, 202651-20058 contacts →

Exact match

“In 1994, the late Attorney David Cohen (1946-2021) who was the Senior Partner at Cohen Immigration Law, launched canadavisa.com.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchVilafranca Del Penedes, SpainHQ recorded Sep 28, 202611-5054 contacts →

Exact match

“Despacho de abogados altamente especializado en Extranjería y Movilidad Internacional”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchAvenidas Novas, PortugalHQ recorded Sep 28, 202651-20048 contacts →

Exact match

“Martins Castro - International Consultancy in Citizenship and Mobility for Europe Martins Castro has a team of experts in legal assistance for Portuguese and Spanish nationality…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchSão Paulo, BrazilHQ recorded Sep 28, 202651-20048 contacts →

Exact match

“A Simonato é uma assessoria especializada exclusivamente em cidadania italiana.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchSan Francisco, CA, United StatesHQ recorded Sep 28, 202611-5047 contacts →

Exact match

“Van Der Hout LLP has specialized in the practice of immigration and nationality law since the firm was founded by Marc Van Der Hout in 1980.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchDubai, United Arab EmiratesHQ recorded Sep 28, 202611-5044 contacts →

Exact match

“Citizenship Invest is a pioneering advisory firm specializing in investors programs to obtain residency and citizenship in multiple countries worldwide and is accredited by…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchColle Di Val D Elsa, ItalyHQ recorded Sep 28, 202611-5044 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchCharlotte, NC, United StatesHQ recorded Sep 28, 202611-5043 contacts →

Exact match

“Founded in 1997, Garfinkel Immigration Law Firm is one of the largest immigration firms in the Carolinas.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchPasadena, CA, United StatesHQ recorded Sep 28, 202651-20042 contacts →

Exact match

“Reeves Immigration Law Group is known for extraordinary commitment to clients and is devoted exclusively to the practice of U.S.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchSão Caetano Do Sul, BrazilHQ recorded Sep 28, 202651-20041 contacts →

Exact match

“A Terra Nostra Cidadania é uma assessoria com mais de 24 anos de experiência.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchQuito, EcuadorHQ recorded Sep 28, 202611-5041 contacts →

Exact match

“Trabajamos en procesos de Nacionalidades Portuguesa para clientes naturales, y al mismo tiempo resolvemos todas las dudas corporativas que puedan surgir a las empresas, tanto…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchJerusalem, IsraelHQ recorded Sep 28, 202611-5039 contacts →

Exact match

“WHO WE ARE Decker, Pex & Co is an Israeli law firm with extensive experience in immigration, working with both local and foreign clients.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchSan Diego, CA, United StatesHQ recorded Sep 28, 202611-5037 contacts →

Exact match

“The Sapochnick Law Firm is a firm wholly dedicated to US and Global immigration law and the highest personal and ethical standard of client service.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchAmsterdam, NetherlandsHQ recorded Sep 28, 202611-5037 contacts →

Exact match

“Everaert Advocaten is a leading immigration law firm in the Netherlands.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchSão Paulo, BrazilHQ recorded Sep 28, 202611-5037 contacts →

Exact match

“A Master Cidadania é um escritório especializado no reconhecimento da cidadania italiana pela via judicial.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202611-5035 contacts →

Exact match

“Wildes & Weinberg, P.C, perhaps the United States' premier law firm concentrating in the immigration and nationality field, grew out of the practice of Leon Wildes, Esq, a…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 1,474 dual citizenship law firms worldwide

See the full list, filter by size, metro and specialty, and access 2,178 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Dual citizenship law firms worldwide at a glance

As of Sep 28, 2026
28.2%Verified-email coverage
5.2Average contacts per company
1-10Median size (employees)
4.0%Largest-city concentration · Madrid
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
1,067
11-50
336
51-200
50
201-500
8
501-1,000
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 dual citizenship law firms are linked below.
What qualifies
Company records worldwide whose business descriptions match “dual citizenship 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 2,178 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 28, 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.

Dual citizenship law firms by location

11 lists · largest first

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

How many dual citizenship law firms are there worldwide?

RevenueBase identified 1,474 company matches for dual citizenship 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?

Cidadania4u tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most dual citizenship law firms?

The United States leads with 423 companies, followed by Spain (157) and Brazil (127). Every dual citizenship law firms list by country and city is linked on this page.

Which city has the most dual citizenship law firms?

Madrid leads with 59 company records, followed by New York (49) and Sao Paulo (38).

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 2,178 professional contacts with verified work emails tracked across these 1,474 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 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 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.