Company lists · Data refreshed September 2026

Top 25 International legal services based in Washington, United States

Name: International legal services based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 55 companies tracked

RevenueBase identified 55 international legal services headquartered in Washington, United States as of September 2026 and tracks 992 professional contacts across them, including 323 with verified work emails. New York is the largest hub.

This list covers international legal services headquartered in Washington, United States, 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 20, 2026.

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 20, 2026 86% judged on-target in blind review

55Companies

992Contacts tracked

323Verified emails

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The 25 largest international legal services based in Washington, United States

Ranked by team size

Top 25 of 55 international legal services based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to international legal services: 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	IBM Promontory	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	501-1,000	403 contacts →
	Indirect evidence “IBM Promontory is a global leader in strategy, risk management, and compliance consulting.#IBMConsulting” Source: RevenueBase Database · checked Sep 20, 2026
2	Consilio Services LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1,001-5,000	168 contacts →
	Partial evidence “It all starts with our mission: To be a trusted advisor that brings expertise to tackle any legal challenge that multinational corporations and law firms face, whenever and…” Source: RevenueBase Database · checked Sep 20, 2026
3	Cassidy Levy Kent	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	79 contacts →
	Strong evidence “Cassidy Levy Kent (CLK) is an international law firm that focuses on legal and policy issues raised by cross-border transactions, trade controls, trade remedy litigation…” Source: RevenueBase Database · checked Sep 20, 2026
4	Maggio Kattar Nahajzer Alexander PC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	55 contacts →
	Indirect evidence “Maggio Kattar has been recognized as one of the top Immigration Law firms in the U.S.” Source: RevenueBase Database · checked Sep 20, 2026
5	Berliner Corcoran & Rowe LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	44 contacts →
	Partial evidence “Berliner Corcoran & Rowe LLP is a boutique law firm focused on international law, export controls/sanctions/customs/OFAC/CFIUS, litigation, corporate and intellectual property law.” Source: RevenueBase Database · checked Sep 20, 2026
6	Picard Kentz & Rowe LLP	Partial evidence	Washington, United StatesHQ checked Sep 20, 2026	11-50	28 contacts →
	Partial evidence “Picard Kentz & Rowe is a firm expert in international law, international litigation and arbitration, international trade and investment, and advocacy on behalf of clients…” Source: RevenueBase Database · checked Sep 20, 2026
7	BSA Legal Group	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	21 contacts →
	Strong evidence “The BSA Legal Group is a boutique international law and consulting firm dedicated to providing creative and cost effective solutions to its international and domestic based…” Source: RevenueBase Database · checked Sep 20, 2026
8	GST LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	19 contacts →
	Partial evidence “GST LLP is an international dispute resolution firm with offices in Washington, D.C, Miami and London.” Source: RevenueBase Database · checked Sep 20, 2026
9	The Kenrich Group LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	14 contacts →
	Indirect evidence “The Kenrich Group, an HKA Company, is a business and litigation consulting firm with 50 offices in 19 countries.” Source: RevenueBase Database · checked Sep 20, 2026
10	The Bristol Group Pllc	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	12 contacts →
	Indirect evidence “The Bristol Group is a premier Washington, D.C.” Source: RevenueBase Database · checked Sep 20, 2026
11	Winton & Chapman Pllc	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	11 contacts →
	Partial evidence “Winton & Chapman is a boutique law firm that brings decades of experience and a global perspective to the practice of international trade law.” Source: RevenueBase Database · checked Sep 20, 2026
12	Leetoledo LAW	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence “Direito Internacional Empresarial” Source: RevenueBase Database · checked Sep 20, 2026
13	O Riordan Bethel LAW Firm, LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	7 contacts →
	Indirect evidence “Nationally-recognized and award-winning economists, lawyers and public policy experts providing public policy analysis; business process improvement; research and analysis…” Source: RevenueBase Database · checked Sep 20, 2026
14	Hayman-Woodward LAW Firm LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	7 contacts →
	Indirect evidence “HAYMAN-WOODWARD IMMIGRATION LAW FIRM LLP is a United States-based immigration and business law firm.” Source: RevenueBase Database · checked Sep 20, 2026
15	Adhikari LAW Pllc	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence “Adhikari Law PLLC is a technology-driven state-of-art boutique law firm with the specialization in U.S.” Source: RevenueBase Database · checked Sep 20, 2026
16	Alvarez Martinez LAW Firm LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	5 contacts →
	Partial evidence “Alvarez Martinez Law Firm is a specialized firm that provides advisory services and international litigation in international human rights law and immigration law.” Source: RevenueBase Database · checked Sep 20, 2026
17	The Chaklader Firm	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	5 contacts →
	Partial evidence “The Chaklader Firm is a professional legal services corporation with attorneys that cater to the complex needs of companies and individuals in Litigation, Contracts &…” Source: RevenueBase Database · checked Sep 20, 2026
18	Musolino & Dessel, Pllc	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence “Musolino & Dessel PLLC is a boutique law firm based out of 1615 L St NW #440, Washington, D.C.” Source: RevenueBase Database · checked Sep 20, 2026
19	Luks Cormaney LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	4 contacts →
	Indirect evidence “Boutique law firm that provides guidance to U.S.” Source: RevenueBase Database · checked Sep 20, 2026
20	LAW Offices Of Charles H. Camp, P.C	Partial evidence	Washington, United StatesHQ checked Sep 20, 2026	1-10	4 contacts →
	Partial evidence “After practicing law at large international law firms for twenty years, Mr.” Source: RevenueBase Database · checked Sep 20, 2026
21	International Business LAW Firm PC	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	3 contacts →
	Partial evidence “Law Firm specializing in international business law, including business and family immigration, green card and other labor visas, corporate registrations and administrative and…” Source: RevenueBase Database · checked Sep 20, 2026
22	Mantid International LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	3 contacts →
	Partial evidence “MANTID INTERNATIONAL LLC is a compliance and business intelligence consulting firm.” Source: RevenueBase Database · checked Sep 20, 2026
23	Federal Practice Group	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	2 contacts →
	Strong evidence “Legal representation for Military Criminal Defense, Federal Employment Law, Government Contracts, Litigation, Federal Criminal, International Business, Immigration, and National…” Source: RevenueBase Database · checked Sep 20, 2026
24	Boyle & Jasari	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	2 contacts →
	Partial evidence “Boyle & Jasari is a boutique national and international law firm with offices in Washington, DC, Baltimore, MD, Philadelphia, PA, and Anchorage, AK.” Source: RevenueBase Database · checked Sep 20, 2026
25	Altius Immigration LAW	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1-10	2 contacts →
	Indirect evidence “Altius is a Washington, DC-based law firm dedicated to advising individuals and companies in the United States and worldwide on matters of US immigration law.” Source: RevenueBase Database · checked Sep 20, 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: international legal services. 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 international legal services.
Partial evidence: Its own public description names part of international legal services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name international legal services. 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 55 international legal services based in Washington, United States

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International legal services based in Washington, United States at a glance

As of Sep 20, 2026

32.6%Verified-email coverage

18.0Average contacts per company

1-10Median size (employees)

243.6%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 55 companies.

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 international legal services, 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.
What qualifies: Companies headquartered in Washington, United States whose own description of what they do matches “international legal services”. 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 international legal services), 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 international legal services, and records with no verified work email. Companies headquartered outside Washington are excluded even when they keep an office there.
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, 323 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 20, 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.

International legal services by metro in the United States

International legal services in New York134
International legal services in Washington55
International legal services in Miami45
International legal services in Houston27
International legal services in Chicago25

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 international legal services, 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 international legal services are there based in Washington, United States?

RevenueBase identified 55 international legal services headquartered in Washington, United States 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?

IBM Promontory, headquartered in Washington, tops this list with the largest team on record.

Which city has the most international legal services?

New York leads with 134 headquartered companies, followed by Washington (55) and Miami (45).

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 323 verified decision-maker contacts tracked across these 55 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 20, 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.