Company lists · Data refreshed September 2026

Top 25 Public affairs firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 8,501 companies tracked

RevenueBase identified 8,501 public affairs firms worldwide as of September 2026 and tracks 75,029 professional contacts across them, including 29,407 with verified work emails. The United States is the largest market and Washington the largest hub.

This list covers public affairs 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 20, 2026. Country and city lists for public affairs 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 20, 2026 86% judged on-target in blind review

8,501Companies

75,029Contacts tracked

29,407Verified emails

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The 25 largest public affairs firms worldwide

Ranked by team size

Top 25 of 8,501 public affairs firms worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to public affairs 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 20, 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 20, 2026
2	Adfactors PR	Partial evidence	Mumbai, IndiaHQ checked Sep 20, 2026	1,001-5,000	1,920 contacts →
	Partial evidence “Adfactors PR, founded in 1997, is India's largest Public Relations firm.” Source: RevenueBase Database · checked Sep 20, 2026
3	Hill & Knowlton	Indirect evidence	NY, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,450 contacts →
	Indirect evidence “Hill & Knowlton is a strategic and creative partner to drive breakthrough opportunities for growth and value creation, advance corporate strategy, and build reputation capital and…” Source: RevenueBase Database · checked Sep 20, 2026
4	Bracewell LLP	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	501-1,000	933 contacts →
	Indirect evidence “Bracewell LLP is a leading law and government relations firm.” Source: RevenueBase Database · checked Sep 20, 2026
5	Prosek Partners	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	201-500	543 contacts →
	Indirect evidence “Prosek Partners builds – and protects – the top brands in business.” Source: RevenueBase Database · checked Sep 20, 2026
6	Boies Schiller Flexner LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	501-1,000	537 contacts →
	Indirect evidence “A firm of internationally recognized trial lawyers, crisis managers, and strategic advisors known for our creative, aggressive, and efficient pursuit of success for our clients.” Source: RevenueBase Database · checked Sep 20, 2026
7	Avian We	Indirect evidence	New Delhi, IndiaHQ checked Sep 20, 2026	201-500	457 contacts →
	Indirect evidence “About Avian We.” Source: RevenueBase Database · checked Sep 20, 2026
8	CFC BIG Ideas	Indirect evidence	Kyiv, UkraineHQ checked Sep 20, 2026	n/a	414 contacts →
	Indirect evidence “СFC Big Ideas is a communications agency specializing in international projects, government relations & PR.” Source: RevenueBase Database · checked Sep 20, 2026
9	DDC Public Affairs	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	411 contacts →
	Strong evidence “DDC Public Affairs builds communities of advocates that impact policy and win campaigns.” Source: RevenueBase Database · checked Sep 20, 2026
10	Mercury Public Affairs, LLC	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	390 contacts →
	Indirect evidence “Mercury is a national bipartisan government relations and strategic communications firm.” Source: RevenueBase Database · checked Sep 20, 2026
11	CMM DE LA Calle, Madrazo, Mancera SC	Indirect evidence	Miguel Hidalgo, MexicoHQ checked Sep 20, 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 20, 2026
12	DKC	Strong evidence	New York, NY, United StatesHQ checked Sep 20, 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 20, 2026
13	Berlinrosen, An Orchestra Company	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	201-500	302 contacts →
	Indirect evidence “Built to operate with the speed and intensity of a political campaign, BerlinRosen takes a 360-degree approach to communications, activating audiences and elevating story above…” Source: RevenueBase Database · checked Sep 20, 2026
14	Bully Pulpit International	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	282 contacts →
	Indirect evidence “Bully Pulpit International (BPI) is an outcomes agency at the intersection of business, politics, and policy.” Source: RevenueBase Database · checked Sep 20, 2026
15	Public Sector Consultants	Partial evidence	Lansing, MI, United StatesHQ checked Sep 20, 2026	n/a	268 contacts →
	Partial evidence “Our Mission: Improving the quality of life for residents of Michigan and beyond through the development and implementation of innovative, actionable public policies.” Source: RevenueBase Database · checked Sep 20, 2026
16	Cornerstone Government Affairs	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 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 20, 2026
17	National Public Relations	Partial evidence	Montreal, QC, CanadaHQ checked Sep 20, 2026	201-500	255 contacts →
	Partial evidence “NATIONAL Public Relations provides creative communications solutions that move people in thought and actions.” Source: RevenueBase Database · checked Sep 20, 2026
18	BGR Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 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 20, 2026
19	Portland	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	229 contacts →
	Strong evidence “Portland is a consultancy specialising in public affairs, corporate affairs and geopolitics.” Source: RevenueBase Database · checked Sep 20, 2026
20	Missionwired	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	201-500	226 contacts →
	Indirect evidence “At MissionWired, we believe your world-changing cause deserves more than marginal gains.” Source: RevenueBase Database · checked Sep 20, 2026
21	SKDK	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	220 contacts →
	Partial 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 20, 2026
22	AVŌQ	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	201-500	205 contacts →
	Indirect evidence “Excellence isn’t enough.” Source: RevenueBase Database · checked Sep 20, 2026
23	DCI	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 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 20, 2026
24	Harmon Corporate Affairs	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	51-200	191 contacts →
	Indirect evidence “Harmon is a strategic consulting firm that advises organizations on interpreting their environment and connecting with their stakeholders through non-market strategies.” Source: RevenueBase Database · checked Sep 20, 2026
25	Plus Communications	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 20, 2026	201-500	188 contacts →
	Indirect evidence “Strategy + Execution = Results.” 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: public affairs 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 public affairs firms.
Partial evidence: Its own public description names part of public affairs firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name public affairs 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 8,501 public affairs firms worldwide

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Public affairs firms worldwide at a glance

As of Sep 20, 2026

39.2%Verified-email coverage

8.8Average contacts per company

1-10Median size (employees)

8.6%Largest-city concentration · Washington

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

6,391

11-50

1,740

51-200

282

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 public affairs 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 public affairs firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “public affairs 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 public affairs 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 public affairs 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, 29,407 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.

Public affairs firms by location

56 lists · largest first

Every Public affairs 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 public affairs 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 public affairs firms are there worldwide?

RevenueBase identified 8,501 public affairs 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 public affairs firms?

The United States leads with 4,036 companies, followed by the United Kingdom (349) and Canada (309). Every public affairs firms list by country and city is linked on this page.

Which city has the most public affairs firms?

Washington leads with 735 headquartered companies, followed by London (199) and New York (174).

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 29,407 verified decision-maker contacts tracked across these 8,501 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.