Company lists · Data refreshed September 2026

Top 25 Advocacy consultants based in the United States

Name: Advocacy consultants based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 5,554 companies tracked

RevenueBase identified 5,554 company matches for advocacy consultants associated with the United States as of September 2026 and tracks 41,307 professional contacts across them, including 18,792 with verified work emails. Washington is the largest hub.

This list covers company matches for advocacy consultants associated with the United States, 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 21, 2026.

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 21, 2026 How this list was built

5,554Companies

41,307Contacts tracked

18,792Verified emails

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The 25 largest advocacy consultants based in the United States

Ranked by team size

Top 25 of 5,554 company matches for advocacy consultants based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	APCO	Exact match	Washington, DC, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,578 contacts →
	Exact match “APCO is a global advisory and advocacy firm helping organizations build the un/common ground upon which progress is made.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	DDC Public Affairs	Exact match	Washington, DC, United StatesHQ recorded Sep 21, 2026	51-200	411 contacts →
	Exact match “DDC Public Affairs builds communities of advocates that impact policy and win campaigns.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	The Outreach Team	Exact match	Ithaca, NY, United StatesHQ recorded Sep 21, 2026	201-500	398 contacts →
	Exact match “The Outreach Team is a national consulting firm working to make the world a better place.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Mercury Public Affairs, LLC	Exact match	New York, NY, United StatesHQ recorded Sep 21, 2026	51-200	390 contacts →
	Exact match “Mercury is a national bipartisan government relations and strategic communications firm.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Disability Rights California	Exact match	Sacramento, CA, United StatesHQ recorded Sep 21, 2026	201-500	380 contacts →
	Exact match “We are the largest disability advocacy agency in the nation, with 275 staff members.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Deep Water Point & Associates	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	201-500	350 contacts →
	Exact match “Deep Water Point & Associates is composed of industry veterans and government experts who dedicate their expertise to maximize our clients’ competitive edge.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	DKC	Exact match	New York, NY, United StatesHQ recorded Sep 21, 2026	201-500	349 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Berlinrosen, An Orchestra Company	Exact match	New York, NY, United StatesHQ recorded Sep 21, 2026	201-500	302 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	Public Sector Consultants	Exact match	Lansing, MI, United StatesHQ recorded Sep 21, 2026	n/a	268 contacts →
	Exact match “Our Mission: Improving the quality of life for residents of Michigan and beyond through the development and implementation of innovative, actionable public policies.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Cornerstone Government Affairs	Exact match	Washington, DC, United StatesHQ recorded Sep 21, 2026	201-500	255 contacts →
	Exact match “Cornerstone Government Affairs is a full-service, bipartisan, employee-owned firm specializing in government relations and lobbying, public affairs, strategic communications, and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	BGR Group	Exact match	Washington, DC, United StatesHQ recorded Sep 21, 2026	51-200	243 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Cohen Milstein Sellers & Toll LLP	Exact match	Washington, DC, United StatesHQ recorded Sep 21, 2026	51-200	236 contacts →
	Exact match “Cohen Milstein Sellers & Toll LLP champions the causes of real people-workers, consumers, small business owners, investors, and whistleblowers-working to deliver corporate reforms…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Missionwired	Exact match	Washington, DC, United StatesHQ recorded Sep 21, 2026	201-500	226 contacts →
	Exact match “At MissionWired, we believe your world-changing cause deserves more than marginal gains.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	SKDK	Exact match	Washington, DC, United StatesHQ recorded Sep 21, 2026	51-200	220 contacts →
	Exact match “SKDK provides strategic advice, public relations, crisis communications, advertising, direct mail, and research to national and international companies, advocacy organizations…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	Heplerbroom LLC	Exact match	Edwardsville, IL, United StatesHQ recorded Sep 21, 2026	201-500	217 contacts →
	Exact match “HeplerBroom LLC is committed to bringing Excellence, Results, and Integrity to everything we do.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	M R	Exact match	Washington, United StatesHQ recorded Sep 21, 2026	51-200	208 contacts →
	Exact match “We are M+R.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	AVŌQ	Exact match	Washington, DC, United StatesHQ recorded Sep 21, 2026	201-500	205 contacts →
	Exact match “Excellence isn’t enough.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	DCI	Exact match	Washington, DC, United StatesHQ recorded Sep 21, 2026	51-200	198 contacts →
	Exact match “DCI Group is an independent public affairs consulting firm that specializes in public relations, crisis management, grassroots engagement, and digital advocacy.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Hmea, INC	Exact match	Franklin, MA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	194 contacts →
	Exact match “HMEA and Advocates have merged.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Plus Communications	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	201-500	188 contacts →
	Exact match “Strategy + Execution = Results.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Lilly & Company	Exact match	Austin, TX, United StatesHQ recorded Sep 21, 2026	n/a	187 contacts →
	Exact match “Since its inception, Lilly & Company has built a unique and comprehensive strategy for providing the best possible services available in political fundraising and grassroots…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Secrest Wardle	Exact match	Troy, MI, United StatesHQ recorded Sep 21, 2026	51-200	183 contacts →
	Exact match “From our humble beginnings as the law office of a single practitioner over one hundred years ago, Secrest Wardle has grown into one of Michigan's largest and most successful law…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Global Strategy Group	Exact match	New York, NY, United StatesHQ recorded Sep 21, 2026	51-200	179 contacts →
	Exact match “Global Strategy Group is the go-to public affairs, communications, and research partner for companies, causes, and campaigns.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Blue State	Exact match	Brooklyn, United StatesHQ recorded Sep 21, 2026	201-500	170 contacts →
	Exact match “We believe there’s no force more powerful than people taking collective action on the things they care about.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Mcallister & Quinn	Exact match	Washington, DC, United StatesHQ recorded Sep 21, 2026	51-200	170 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “advocacy consultants”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 5,554 advocacy consultants based in the United States

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Advocacy consultants based in the United States at a glance

As of Sep 21, 2026

45.5%Verified-email coverage

7.4Average contacts per company

1-10Median size (employees)

15.1%Largest-city concentration · Washington

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

4,487

11-50

873

51-200

153

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 5,554 companies.

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.
What qualifies: Company records associated with the United States whose business descriptions match “advocacy consultants” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 18,792 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 21, 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.

Advocacy consultants by metro

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 “advocacy consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many advocacy consultants are there based in the United States?

RevenueBase identified 5,554 company matches for advocacy consultants associated with the United States 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?

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

Which city has the most advocacy consultants?

Washington leads with 841 company records, followed by New York (259) and Sacramento (139).

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 18,792 professional contacts with verified work emails tracked across these 5,554 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 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 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.