Company lists · Data verified August 2026

Top 25 Advocacy consulting firms based in the United States

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 5,715 companies tracked

There are 5,715 advocacy consulting firms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 46,128 professional contacts across them, including 22,107 with verified work emails and 22,581 with mobile numbers. Washington is the largest hub.

This list covers advocacy consulting firms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

5,715Companies

46,128Contacts tracked

22,107Verified emails

22,581Mobile numbers

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The 25 largest advocacy consulting firms based in the United States

Ranked by team size

Top 25 of 5,715 advocacy consulting firms based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Taft Stettinius & Hollister LLP	Indianapolis, IN	1,001-5,000	1,963	1,418
2	Faegre Drinker	Scottsdale, AZ	1,001-5,000	1,827	1,444
3	Manatt, Phelps & Phillips, LLP	Redwood City, CA	501-1,000	1,089	685
4	Solomonedwards	Wayne, PA	1,001-5,000	566	179
5	Boies Schiller Flexner LLP	New York, NY	501-1,000	541	286
6	The Outreach Team	Ithaca, NY	201-500	389	47
7	Deep Water Point & Associates	Mclean, VA	201-500	347	180
8	DKC	New York, NY	201-500	346	147
9	Berlinrosen, An Orchestra Company	New York, NY	201-500	307	176
10	Cornerstone Government Affairs	Washington, DC	201-500	256	176
11	Missionwired	Washington, DC	201-500	229	175
12	Heplerbroom LLC	Edwardsville, IL	201-500	219	129
13	AVŌQ	New York, NY	201-500	205	177
14	DCI	Washington, DC	51-200	194	63
15	Plus Communications	Arlington, VA	201-500	189	118
16	Secrest Wardle	Troy, MI	51-200	187	96
17	Invariant	Washington, DC	51-200	169	104
18	Blue State	Los Angeles, CA	201-500	168	110
19	Orchestra	New York, NY	501-1,000	167	103
20	Rational 360	Washington, DC	51-200	157	94
21	Ripple Effect	Rockville, MD	201-500	151	121
22	AMA Consulting Group, LLC	Hato Rey	51-200	150	47
23	M C Saatchi SSK	New York, NY	51-200	140	33
24	Public & Government Affairs At Edelman	Washington, DC	201-500	125	58
25	ACTUM	Los Angeles, CA	51-200	123	79

Showing 25 of 5,715 advocacy consulting firms based in the United States

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Advocacy consulting firms based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

WashingtonLargest hub · 870 HQs

22,581Contacts with mobile numbers

179Emails re-verified in last 30 days

Companies by employee count

1-10

4,585

11-50

925

51-200

158

201-500

501-1,000

1,001-5,000

5,001-10,000

Advocacy consulting firms by metro

Metro	Companies
Advocacy consulting firms in Washington	870
Advocacy consulting firms in New York	234
Advocacy consulting firms in Chicago	140
Advocacy consulting firms in Sacramento	132
Advocacy consulting firms in Los Angeles	130
Advocacy consulting firms in Austin	121
Advocacy consulting firms in Atlanta	104
Advocacy consulting firms in Boston	91

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “advocacy consulting firms”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 179 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many advocacy consulting firms are there based in the United States?

There are 5,715 advocacy consulting firms headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most advocacy consulting firms?

Washington leads with 870 headquartered companies, followed by New York (234) and Chicago (140).

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 22,107 verified decision-maker contacts tracked across these 5,715 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.