Company lists · Data refreshed September 2026

Top 25 Government affairs consulting firms worldwide

Name: Government affairs consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 4,460 companies tracked

RevenueBase identified 4,460 government affairs consulting firms worldwide as of September 2026 and tracks 39,532 professional contacts across them, including 17,558 with verified work emails. The United States is the largest market and Washington the largest hub.

This list covers government affairs consulting firms 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 28, 2026. Country and city lists for government affairs consulting firms 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

4,460Companies

39,532Contacts tracked

17,558Verified emails

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The 25 largest government affairs consulting firms worldwide

Ranked by team size

Top 25 of 4,460 government affairs consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to government affairs consulting firms: 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	Taft Stettinius & Hollister LLP	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,980 contacts →
	Indirect evidence “At Taft, we work as one team, driven and committed to helping you succeed.” Source: RevenueBase Database · checked Sep 28, 2026
2	Venable LLP	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,790 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
3	Buchanan Ingersoll & Rooney PC	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 28, 2026	501-1,000	1,197 contacts →
	Partial evidence “Buchanan Ingersoll & Rooney is a national law firm with a proven reputation for providing progressive, industry-leading legal, business, regulatory and government relations advice…” Source: RevenueBase Database · checked Sep 28, 2026
4	Bracewell LLP	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	501-1,000	933 contacts →
	Partial evidence “Bracewell LLP is a leading law and government relations firm.” Source: RevenueBase Database · checked Sep 28, 2026
5	Brownstein Hyatt Farber Schreck	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	501-1,000	902 contacts →
	Indirect evidence “For decades, we’ve positioned ourselves at the intersection of law, business and policy to bring a multidisciplinary strategy to every issue.” Source: RevenueBase Database · checked Sep 28, 2026
6	DDC Public Affairs	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	411 contacts →
	Partial evidence “DDC Public Affairs builds communities of advocates that impact policy and win campaigns.” Source: RevenueBase Database · checked Sep 28, 2026
7	Mercury Public Affairs, LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	51-200	390 contacts →
	Partial evidence “Mercury is a national bipartisan government relations and strategic communications firm.” Source: RevenueBase Database · checked Sep 28, 2026
8	CMM DE LA Calle, Madrazo, Mancera SC	Indirect evidence	Miguel Hidalgo, MexicoHQ checked Sep 28, 2026	n/a	362 contacts →
	Indirect evidence “Somos una empresa consultora en asuntos públicos que conjunta sustancia con forma y traduce pensamiento al considerar gran diversidad de puntos de vista y panoramas.” Source: RevenueBase Database · checked Sep 28, 2026
9	DKC	Strong evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	349 contacts →
	Strong evidence “DKC is a full service public relations, marketing and government affairs firm and part of the Acceleration Community of Companies, Based in New York City, and with offices in Los…” Source: RevenueBase Database · checked Sep 28, 2026
10	Cornerstone Government Affairs	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	201-500	255 contacts →
	Strong evidence “Cornerstone Government Affairs is a full-service, bipartisan, employee-owned firm specializing in government relations and lobbying, public affairs, strategic communications, and…” Source: RevenueBase Database · checked Sep 28, 2026
11	BGR Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	243 contacts →
	Indirect evidence “The Services You Need BGR Group offers an integrated suite of bipartisan lobbying, strategic communications and advocacy solutions that help meet challenges in a risky…” Source: RevenueBase Database · checked Sep 28, 2026
12	Keller And Heckman LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	230 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 28, 2026
13	SKDK	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	220 contacts →
	Indirect evidence “SKDK provides strategic advice, public relations, crisis communications, advertising, direct mail, and research to national and international companies, advocacy organizations…” Source: RevenueBase Database · checked Sep 28, 2026
14	DCI	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	198 contacts →
	Strong evidence “DCI Group is an independent public affairs consulting firm that specializes in public relations, crisis management, grassroots engagement, and digital advocacy.” Source: RevenueBase Database · checked Sep 28, 2026
15	Plus Communications	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 28, 2026	201-500	188 contacts →
	Indirect evidence “Strategy + Execution = Results.” Source: RevenueBase Database · checked Sep 28, 2026
16	Lilly & Company	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	n/a	187 contacts →
	Indirect evidence “Since its inception, Lilly & Company has built a unique and comprehensive strategy for providing the best possible services available in political fundraising and grassroots…” Source: RevenueBase Database · checked Sep 28, 2026
17	Mcallister & Quinn	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	170 contacts →
	Strong evidence “McAllister & Quinn is a Washington, DC consulting firm that provides a comprehensive range of services to a diverse group of clients with issues before the federal government.” Source: RevenueBase Database · checked Sep 28, 2026
18	Bowergroupasia	Strong evidence	Washington, United StatesHQ checked Sep 28, 2026	201-500	169 contacts →
	Strong evidence “BGA is the government affairs firm for companies and capital deployers whose success across the Indo-Pacific and Africa depends on how governments decide and act.” Source: RevenueBase Database · checked Sep 28, 2026
19	Invariant	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	166 contacts →
	Indirect evidence “Invariant is a bipartisan business advisory firm, providing strategic advice to companies, trade associations, non-profits, and individuals on how to make Washington work for them.” Source: RevenueBase Database · checked Sep 28, 2026
20	Political Intelligence Brussels	Partial evidence	Brussels, BelgiumHQ checked Sep 28, 2026	n/a	163 contacts →
	Partial evidence “Political Intelligence is an independent public affairs consultancy, with offices in Brussels, Lisbon, London, Madrid.” Source: RevenueBase Database · checked Sep 28, 2026
21	BMJ Consultores Associados	Strong evidence	Brasilia, BrazilHQ checked Sep 28, 2026	51-200	139 contacts →
	Strong evidence “BMJ & Associates is a Brazilian consulting firm specialized in International Trade, Government Affairs, Tax Analysis, Strategic Communication and Regulatory Affairs.” Source: RevenueBase Database · checked Sep 28, 2026
22	Vriens & Partners	Strong evidence	SingaporeHQ checked Sep 28, 2026	51-200	134 contacts →
	Strong evidence “Vriens & Partners is Southeast Asia’s leading government affairs consultancy, with over 115 staff and 50 advisors across 9 offices in capitals around the region and in Washington…” Source: RevenueBase Database · checked Sep 28, 2026
23	Strategycorp	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	51-200	130 contacts →
	Indirect evidence “Being right isn't enough.” Source: RevenueBase Database · checked Sep 28, 2026
24	Mcguirewoods Consulting	Partial evidence	Richmond, VA, United StatesHQ checked Sep 28, 2026	51-200	127 contacts →
	Partial evidence “What people say and do in government can have a profound impact on your organization.” Source: RevenueBase Database · checked Sep 28, 2026
25	Global Counsel	Indirect evidence	Doha, United KingdomHQ checked Sep 28, 2026	51-200	125 contacts →
	Indirect evidence “Global Counsel is an advisory firm that works with clients to navigate the critical area between business, politics and policymaking.” Source: RevenueBase Database · checked Sep 28, 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: government affairs consulting firms. 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 government affairs consulting firms.
Partial evidence: Its own public description names part of government affairs consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government affairs consulting firms. 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 4,460 government affairs consulting firms worldwide

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Government affairs consulting firms worldwide at a glance

As of Sep 28, 2026

44.4%Verified-email coverage

8.9Average contacts per company

1-10Median size (employees)

13.0%Largest-city concentration · Washington

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

3,466

11-50

817

51-200

133

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among government affairs consulting firms, 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 government affairs consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “government affairs consulting firms”. 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 government affairs consulting firms), 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 government affairs consulting firms, 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, 17,558 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 28, 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.

Government affairs consulting firms by location

38 lists · largest first

Every Government affairs consulting 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 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 government affairs consulting firms, 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 government affairs consulting firms are there worldwide?

RevenueBase identified 4,460 government affairs consulting firms 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?

Taft Stettinius & Hollister LLP, headquartered in Cincinnati, tops this list with the largest team on record.

Which country has the most government affairs consulting firms?

The United States leads with 2,529 companies, followed by Canada (147) and Brazil (91). Every government affairs consulting firms list by country and city is linked on this page.

Which city has the most government affairs consulting firms?

Washington leads with 579 headquartered companies, followed by Sacramento (103) and Austin (85).

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 17,558 verified decision-maker contacts tracked across these 4,460 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 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 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.