Company lists · Data refreshed September 2026

Top 25 Advocacy organizations consulting firms worldwide

RevenueBase identified 36,199 advocacy organizations consulting firms worldwide as of September 2026 and tracks 273,957 professional contacts across them, including 93,304 with verified work emails. The United States is the largest market and Washington the largest hub.

This list covers advocacy organizations 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 27, 2026. Country and city lists for advocacy organizations 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 27, 2026 86% judged on-target in blind review
36,199Companies
273,957Contacts tracked
93,304Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest advocacy organizations consulting firms worldwide

Ranked by team size
Top 25 of 36,199 advocacy organizations consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to advocacy organizations 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceChicago, IL, United StatesHQ checked Sep 27, 20265,001-10,0006,978 contacts →

Partial evidence

“As one of the original firms, we’ve never lost sight of the fact that consulting is a people business.”

Source: RevenueBase Database · checked Sep 27, 2026
2Partial evidenceRockville, MD, United StatesHQ checked Sep 27, 20261,001-5,0003,323 contacts →

Partial evidence

“Abt is a mission-driven consulting and research firm.”

Source: RevenueBase Database · checked Sep 27, 2026
3Partial evidenceAustraliaHQ checked Sep 27, 20261,001-5,0002,667 contacts →

Partial evidence

“MinterEllison is one of Australia’s largest independent law and consulting firms.”

Source: RevenueBase Database · checked Sep 27, 2026
4Indirect evidenceColumbia, SC, United StatesHQ checked Sep 27, 20261,001-5,0002,012 contacts →

Indirect evidence

“Established in 1897, Nelson Mullins is an Am Law 100 firm of more than attorneys, policy advisors and professionals with 33 offices in 17 states and Washington, D.C.”

Source: RevenueBase Database · checked Sep 27, 2026
5Indirect evidenceCincinnati, OH, United StatesHQ checked Sep 27, 20261,001-5,0001,980 contacts →

Indirect evidence

“At Taft, we work as one team, driven and committed to helping you succeed.”

Source: RevenueBase Database · checked Sep 27, 2026
6Indirect evidenceJericho, NY, PalestineHQ checked Sep 27, 20261,001-5,0001,954 contacts →

Indirect evidence

“J.S.”

Source: RevenueBase Database · checked Sep 27, 2026
7Indirect evidencePhiladelphia, PA, United StatesHQ checked Sep 27, 20261,001-5,0001,848 contacts →

Indirect evidence

“Faegre Drinker is a firm designed for clients.”

Source: RevenueBase Database · checked Sep 27, 2026
8Indirect evidenceNew York, NY, United StatesHQ checked Sep 27, 20261,001-5,0001,814 contacts →

Indirect evidence

“FGS Global is the strategic leadership advisory for a complex world.”

Source: RevenueBase Database · checked Sep 27, 2026
9Partial evidenceBoston, MA, United StatesHQ checked Sep 27, 20261,001-5,0001,781 contacts →

Partial evidence

“Analysis Group is one of the largest international economics consulting firms, with more than 1,500 professionals across 15 offices in North America, Europe, and Asia.”

Source: RevenueBase Database · checked Sep 27, 2026
10Indirect evidenceAmersfoort, NetherlandsHQ checked Sep 27, 20261,001-5,0001,755 contacts →

Indirect evidence

“BMC is opgericht vanuit de overtuiging dat de bedrijfsvoering binnen de overheid kon worden verbeterd.”

Source: RevenueBase Database · checked Sep 27, 2026
11Indirect evidencePhiladelphia, PA, United StatesHQ checked Sep 27, 20261,001-5,0001,682 contacts →

Indirect evidence

“Ballard Spahr LLP, an Am Law 100 law firm with more than 750 lawyers in 19 U.S.”

Source: RevenueBase Database · checked Sep 27, 2026
12Partial evidenceWashington, DC, United StatesHQ checked Sep 27, 20261,001-5,0001,578 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 27, 2026
13Indirect evidenceLondon, United KingdomHQ checked Sep 27, 20261,001-5,0001,563 contacts →

Indirect evidence

“Brunswick is a global advisory firm.”

Source: RevenueBase Database · checked Sep 27, 2026
14Partial evidenceAtlanta, GA, United StatesHQ checked Sep 27, 2026501-1,0001,471 contacts →

Partial evidence

“With hundreds of attorneys across the globe, Fisher Phillips advises and advocates for employers internationally on some of the most complex and high-profile workplace matters.”

Source: RevenueBase Database · checked Sep 27, 2026
15Indirect evidenceNew Delhi, IndiaHQ checked Sep 27, 2026501-1,0001,322 contacts →

Indirect evidence

“Headquartered in India with six international offices in Cambodia, Ethiopia, Kenya, the Philippines, Germany and the United Kingdom, IPE Global Group offers a range of integrated…”

Source: RevenueBase Database · checked Sep 27, 2026
16Partial evidenceMilan, ItalyHQ checked Sep 27, 20261,001-5,0001,304 contacts →

Partial evidence

“Intellera Consulting is a consulting company born from the buyout management of the PwC Public administration and Healthcare branch.”

Source: RevenueBase Database · checked Sep 27, 2026
17Indirect evidenceMiami, FL, United StatesHQ checked Sep 27, 20261,001-5,0001,260 contacts →

Indirect evidence

“Expertly balancing experience and innovation to deliver unique solutions to public and private clients.”

Source: RevenueBase Database · checked Sep 27, 2026
18Partial evidenceLondon, United KingdomHQ checked Sep 27, 2026201-5001,221 contacts →

Partial evidence

“Blackmont Consulting provides 100% free advisory services to NGO´s, NPO´s and start-ups.”

Source: RevenueBase Database · checked Sep 27, 2026
19Indirect evidenceLos Angeles, CA, United StatesHQ checked Sep 27, 2026501-1,0001,085 contacts →

Indirect evidence

“Forget everything you thought you knew about professional services firms.”

Source: RevenueBase Database · checked Sep 27, 2026
20Indirect evidenceDenver, CO, United StatesHQ checked Sep 27, 2026501-1,000902 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 27, 2026
21Indirect evidenceNew York, NY, United StatesHQ checked Sep 27, 2026501-1,000821 contacts →

Indirect evidence

“Porter Novelli is the strategic communications company, fueled by innovation, empowering clients to do business better in an ever-changing world.”

Source: RevenueBase Database · checked Sep 27, 2026
22Partial evidenceSao Paulo, BrazilHQ checked Sep 27, 2026501-1,000811 contacts →

Partial evidence

“Fundada em 2003, a Lee, Brock, Camargo Advogados é uma associação de profissionais com habilidades multidisciplinares desenvolvidas em escritórios de advocacia e empresas e que…”

Source: RevenueBase Database · checked Sep 27, 2026
23Indirect evidenceBrisbane, AustraliaHQ checked Sep 27, 2026501-1,000765 contacts →

Indirect evidence

“At Shine, we don't judge you or where you came from.”

Source: RevenueBase Database · checked Sep 27, 2026
24Partial evidenceNew York, NY, United StatesHQ checked Sep 27, 2026501-1,000765 contacts →

Partial evidence

“The Vertex Companies, LLC is a global consulting firm that provides strategic advisory, project management, and dispute resolution services for organizations that face complex…”

Source: RevenueBase Database · checked Sep 27, 2026
25Partial evidenceLos Angeles, CA, United StatesHQ checked Sep 27, 202610001+756 contacts →

Partial evidence

“Ultimate Minds is a professional consulting and marketing firm dedicated to empowering businesses, nonprofits, and startups with smart, affordable, and results-driven solutions.”

Source: RevenueBase Database · checked Sep 27, 2026

Showing 25 of 36,199 advocacy organizations consulting firms worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 93,304 reachable decision-makers.

Free signup · no credit card

View the full list →

Advocacy organizations consulting firms worldwide at a glance

As of Sep 27, 2026
34.1%Verified-email coverage
7.6Average contacts per company
1-10Median size (employees)
3.6%Largest-city concentration · Washington
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
28,223
11-50
6,566
51-200
1,035
201-500
183
501-1,000
57
1,001-5,000
38
5,001-10,000
5
10001+
20

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 organizations 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 advocacy organizations consulting firms are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “advocacy organizations 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 advocacy organizations 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 advocacy organizations 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, 93,304 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 27, 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 organizations consulting firms by location

153 lists · largest first

Every Advocacy organizations 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 advocacy organizations 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 advocacy organizations consulting firms are there worldwide?

RevenueBase identified 36,199 advocacy organizations 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?

Kearney, headquartered in Chicago, tops this list with the largest team on record.

Which country has the most advocacy organizations consulting firms?

The United States leads with 12,596 companies, followed by Brazil (1,504) and the United Kingdom (1,411). Every advocacy organizations consulting firms list by country and city is linked on this page.

Which city has the most advocacy organizations consulting firms?

Washington leads with 1297 headquartered companies, followed by London (660) and New York (600).

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 93,304 verified decision-maker contacts tracked across these 36,199 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 27, 2026.

Ready to reach these companies? Verified emails and direct dials for all 36,199 advocacy organizations consulting firms worldwide. Start with a free account, no credit card.

Download this list →

Related lists

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.