Company lists · Data refreshed September 2026

Top 25 Advocacy consultants worldwide

Name: Advocacy consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 12,149 companies tracked

RevenueBase identified 12,149 advocacy consultants worldwide as of September 2026 and tracks 84,316 professional contacts across them, including 30,582 with verified work emails. The United States is the largest market and Washington the largest hub.

This list covers advocacy consultants 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 21, 2026. Country and city lists for advocacy consultants 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 21, 2026 86% judged on-target in blind review

12,149Companies

84,316Contacts tracked

30,582Verified emails

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The 25 largest advocacy consultants worldwide

Ranked by team size

Top 25 of 12,149 advocacy consultants worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to advocacy consultants: 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	APCO	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,578 contacts →
	Partial evidence “APCO is a global advisory and advocacy firm helping organizations build the un/common ground upon which progress is made.” Source: RevenueBase Database · checked Sep 21, 2026
2	Shine Lawyers	Indirect evidence	Brisbane, AustraliaHQ checked Sep 21, 2026	501-1,000	765 contacts →
	Indirect evidence “At Shine, we don't judge you or where you came from.” Source: RevenueBase Database · checked Sep 21, 2026
3	Leigh DAY	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	748 contacts →
	Indirect evidence “Leigh Day is a law firm established to combat injustice.” Source: RevenueBase Database · checked Sep 21, 2026
4	Showtime Consulting	Indirect evidence	Hyderabad, IndiaHQ checked Sep 21, 2026	201-500	466 contacts →
	Indirect evidence “We bring together the brightest minds from India’s premier institutes to work on the most pressing public outreach challenges.” Source: RevenueBase Database · checked Sep 21, 2026
5	DDC Public Affairs	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 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 21, 2026
6	The Outreach Team	Indirect evidence	Ithaca, NY, United StatesHQ checked Sep 21, 2026	201-500	398 contacts →
	Indirect evidence “The Outreach Team is a national consulting firm working to make the world a better place.” Source: RevenueBase Database · checked Sep 21, 2026
7	Mercury Public Affairs, LLC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	390 contacts →
	Indirect evidence “Mercury is a national bipartisan government relations and strategic communications firm.” Source: RevenueBase Database · checked Sep 21, 2026
8	Disability Rights California	Partial evidence	Sacramento, CA, United StatesHQ checked Sep 21, 2026	201-500	380 contacts →
	Partial evidence “We are the largest disability advocacy agency in the nation, with 275 staff members.” Source: RevenueBase Database · checked Sep 21, 2026
9	Gcps Consulting	Partial evidence	Sheffield, United KingdomHQ checked Sep 21, 2026	n/a	377 contacts →
	Partial evidence “GCPS is a UK-based international consulting firm with a network of highly experienced consultants supporting clients to prevent and respond to staff misconduct (e.g.” Source: RevenueBase Database · checked Sep 21, 2026
10	CMM DE LA Calle, Madrazo, Mancera SC	Indirect evidence	Miguel Hidalgo, MexicoHQ checked Sep 21, 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 21, 2026
11	Deep Water Point & Associates	Indirect evidence	Annapolis, MD, United StatesHQ checked Sep 21, 2026	201-500	350 contacts →
	Indirect evidence “Deep Water Point & Associates is composed of industry veterans and government experts who dedicate their expertise to maximize our clients’ competitive edge.” Source: RevenueBase Database · checked Sep 21, 2026
12	DKC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	349 contacts →
	Indirect 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 21, 2026
13	Berlinrosen, An Orchestra Company	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
14	Public Sector Consultants	Indirect evidence	Lansing, MI, United StatesHQ checked Sep 21, 2026	n/a	268 contacts →
	Indirect 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 21, 2026
15	VERO	Partial evidence	Singapore, VietnamHQ checked Sep 21, 2026	201-500	267 contacts →
	Partial evidence “Vero is an award-winning strategic communications consultancy, advising some of Southeast Asia’s leading brands, corporations, and non-profit organizations.” Source: RevenueBase Database · checked Sep 21, 2026
16	Cornerstone Government Affairs	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	201-500	255 contacts →
	Indirect 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 21, 2026
17	BGR Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	243 contacts →
	Partial 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 21, 2026
18	LPC LAW	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	241 contacts →
	Partial evidence “With over 200 advocates attending hearings in every county court in England & Wales, LPC Law provides specialist advocacy services to lenders, creditors, in-house legal…” Source: RevenueBase Database · checked Sep 21, 2026
19	Cohen Milstein Sellers & Toll LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	236 contacts →
	Indirect evidence “Cohen Milstein Sellers & Toll LLP champions the causes of real people-workers, consumers, small business owners, investors, and whistleblowers-working to deliver corporate reforms…” Source: RevenueBase Database · checked Sep 21, 2026
20	SEC Newgate Italia	Indirect evidence	Milano, ItalyHQ checked Sep 21, 2026	51-200	236 contacts →
	Indirect evidence “Al cuore di ogni organizzazione ci sono le sue relazioni: collaboratori, clienti, filiera, territorio, istituzioni… Perché sono gli "altri" i terminali del suo agire e i…” Source: RevenueBase Database · checked Sep 21, 2026
21	Missionwired	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 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 21, 2026
22	SKDK	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 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 21, 2026
23	Pohwer	Indirect evidence	Stevenage, United KingdomHQ checked Sep 21, 2026	201-500	218 contacts →
	Indirect evidence “POhWER was established in Hertfordshire in 1996 by service users who had successfully supported each other in addressing injustice and social exclusion.” Source: RevenueBase Database · checked Sep 21, 2026
24	Lenczner Slaght	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	51-200	217 contacts →
	Indirect evidence “Widely recognized as Canada’s leading litigation practice, we have successfully represented clients’ interests in some of the most complex, high-profile cases in Canadian legal…” Source: RevenueBase Database · checked Sep 21, 2026
25	Heplerbroom LLC	Indirect evidence	Edwardsville, IL, United StatesHQ checked Sep 21, 2026	201-500	217 contacts →
	Indirect evidence “HeplerBroom LLC is committed to bringing Excellence, Results, and Integrity to everything we do.” Source: RevenueBase Database · checked Sep 21, 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: advocacy consultants. 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 advocacy consultants.
Partial evidence: Its own public description names part of advocacy consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name advocacy consultants. 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 12,149 advocacy consultants worldwide

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Advocacy consultants worldwide at a glance

As of Sep 21, 2026

36.3%Verified-email coverage

6.9Average contacts per company

1-10Median size (employees)

6.9%Largest-city concentration · Washington

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

9,567

11-50

2,116

51-200

356

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 advocacy consultants, 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 advocacy consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “advocacy consultants”. 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 advocacy consultants), 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 advocacy consultants, 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, 30,582 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 21, 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.

Advocacy consultants by location

65 lists · largest first

Every Advocacy consultants 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 advocacy consultants, 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 advocacy consultants are there worldwide?

RevenueBase identified 12,149 advocacy consultants 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?

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

Which country has the most advocacy consultants?

The United States leads with 5,554 companies, followed by Brazil (433) and Canada (383). Every advocacy consultants list by country and city is linked on this page.

Which city has the most advocacy consultants?

Washington leads with 841 headquartered companies, followed by New York (239) and London (209).

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 30,582 verified decision-maker contacts tracked across these 12,149 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 21, 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.