Company lists · Data refreshed September 2026

Top 25 Association consulting firms based in the United States

Name: Association consulting firms 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 5,946 companies tracked

RevenueBase identified 5,946 association consulting firms headquartered in the United States as of September 2026 and tracks 96,073 professional contacts across them, including 43,285 with verified work emails. New York is the largest hub.

This list covers association 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. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

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

5,946Companies

96,073Contacts tracked

43,285Verified emails

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The 25 largest association consulting firms based in the United States

Ranked by team size

Top 25 of 5,946 association consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to association 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Protiviti	Partial evidence	Menlo Park, CA, United StatesHQ checked Sep 21, 2026	5,001-10,000	8,779 contacts →
	Partial evidence “Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Source: RevenueBase Database · checked Sep 21, 2026
2	Kearney	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	5,001-10,000	6,978 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 21, 2026
3	Eisneramper	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,199 contacts →
	Partial evidence “EisnerAmper, one of the largest business consulting firms in the world, is comprised of EisnerAmper LLP, a licensed independent CPA firm that provides client attest services; and…” Source: RevenueBase Database · checked Sep 21, 2026
4	Uhy-Us	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,035 contacts →
	Partial evidence “UHY is one of the nation’s largest professional services firms providing audit, tax, consulting and advisory services to clients primarily in the dynamic middle market.” Source: RevenueBase Database · checked Sep 21, 2026
5	Sikich	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,688 contacts →
	Partial evidence “Sikich offers the public and private sectors a diverse platform of professional services across consulting, technology, and compliance.” Source: RevenueBase Database · checked Sep 21, 2026
6	Charles River Associates	Partial evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,479 contacts →
	Partial evidence “Charles River Associates (CRA) is a global consulting firm specializing in litigation, regulatory, financial, and management consulting.” Source: RevenueBase Database · checked Sep 21, 2026
7	Ardurra	Indirect evidence	Miami, FL, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,260 contacts →
	Indirect evidence “Expertly balancing experience and innovation to deliver unique solutions to public and private clients.” Source: RevenueBase Database · checked Sep 21, 2026
8	Cornerstone Research	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	501-1,000	1,248 contacts →
	Indirect evidence “At Cornerstone Research, we attribute our success to a unique combination of resources: a creative and energetic staff, cutting-edge technology and research, and our work with…” Source: RevenueBase Database · checked Sep 21, 2026
9	Riveron	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,160 contacts →
	Indirect evidence “With over 1,200 professionals across 18 international offices, Riveron delivers tailored solutions for CFOs, private equity firms, and key stakeholders.” Source: RevenueBase Database · checked Sep 21, 2026
10	W3global	Partial evidence	Frisco, TX, United StatesHQ checked Sep 21, 2026	501-1,000	1,149 contacts →
	Partial evidence “W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations.” Source: RevenueBase Database · checked Sep 21, 2026
11	Rubinbrown LLP	Indirect evidence	Saint Louis, MO, United StatesHQ checked Sep 21, 2026	501-1,000	1,056 contacts →
	Indirect evidence “RubinBrown provides unmatched service to closely held and publicly traded companies in specialized market sectors as well as non-profit and public sector organizations.” Source: RevenueBase Database · checked Sep 21, 2026
12	The Vertex Companies LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	765 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 21, 2026
13	Smithbucklin	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	501-1,000	720 contacts →
	Partial evidence “Associations help industries, fields and professions stay current and connected for the members and communities who depend on them.” Source: RevenueBase Database · checked Sep 21, 2026
14	ERG	Partial evidence	Concord, MA, United StatesHQ checked Sep 21, 2026	501-1,000	663 contacts →
	Partial evidence “ERG is a multidisciplinary consulting firm offering a broad range of professional services.” Source: RevenueBase Database · checked Sep 21, 2026
15	Embark	Partial evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	501-1,000	638 contacts →
	Partial evidence “Embark is shaking up the consulting industry with a radical belief: Happy is good for business.” Source: RevenueBase Database · checked Sep 21, 2026
16	Blue & Co., LLC	Indirect evidence	Carmel, IN, United StatesHQ checked Sep 21, 2026	201-500	634 contacts →
	Indirect evidence “At Blue & Co.” Source: RevenueBase Database · checked Sep 21, 2026
17	Wolf & Company, P.C	Indirect evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	201-500	558 contacts →
	Indirect evidence “Wolf & Company P.C.” Source: RevenueBase Database · checked Sep 21, 2026
18	Solomonedwards	Indirect evidence	Wayne, PA, United StatesHQ checked Sep 21, 2026	1,001-5,000	557 contacts →
	Indirect evidence “For more than 25 years, SolomonEdwards has empowered organizations to tackle common and complex business challenges through strategic advisory, technical advocacy, and hands-on…” Source: RevenueBase Database · checked Sep 21, 2026
19	Little Diversified Architectural Consulting	Indirect evidence	Little Global, VA, United StatesHQ checked Sep 21, 2026	201-500	509 contacts →
	Indirect evidence “At Little, we deliver results far beyond architecture-results you wouldn’t expect from an architectural firm.” Source: RevenueBase Database · checked Sep 21, 2026
20	Prager Metis Cpas	Partial evidence	New York, United StatesHQ checked Sep 21, 2026	201-500	467 contacts →
	Partial evidence “Prager Metis CPAs is an independent, full service, public accounting and consulting firm.” Source: RevenueBase Database · checked Sep 21, 2026
21	Haynie	Indirect evidence	Salt Lake City, UT, United StatesHQ checked Sep 21, 2026	201-500	432 contacts →
	Indirect evidence “Haynie is a leading, full-service CPA firm.” Source: RevenueBase Database · checked Sep 21, 2026
22	Resultant	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 21, 2026	201-500	431 contacts →
	Indirect evidence “We are a passionate team of engineers, mathematicians, data analysts, project managers, and business consultants.” Source: RevenueBase Database · checked Sep 21, 2026
23	YHB Cpas & Consultants	Indirect evidence	Winchester, VA, United StatesHQ checked Sep 21, 2026	201-500	376 contacts →
	Indirect evidence “We Are All About You That is why we take a holistic approach to assisting clients with growing, managing, and protecting their hard work.” Source: RevenueBase Database · checked Sep 21, 2026
24	Stevens & LEE	Indirect evidence	Reading, PA, United StatesHQ checked Sep 21, 2026	201-500	354 contacts →
	Indirect evidence “Stevens & Lee is the cornerstone of The Stevens & Lee Companies, a platform of affiliated professional service firms which provides a full range of legal, investment banking…” Source: RevenueBase Database · checked Sep 21, 2026
25	Clark Nuber PS	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 21, 2026	201-500	347 contacts →
	Indirect evidence “Clark Nuber is an award-winning Certified Public Accounting firm located in the Seattle Metro Area.” 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: association consulting 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 association consulting firms.
Partial evidence: Its own public description names part of association consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name association consulting 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 5,946 association consulting firms based in the United States

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Association consulting firms based in the United States at a glance

As of Sep 21, 2026

45.1%Verified-email coverage

16.2Average contacts per company

1-10Median size (employees)

3.9%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

4,070

11-50

1,394

51-200

352

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 5,946 companies.

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 association 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “association 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 association 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 association consulting firms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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, 43,285 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.

Association consulting firms by metro

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 association 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 association consulting firms are there based in the United States?

RevenueBase identified 5,946 association consulting firms headquartered in the United States 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?

Protiviti, headquartered in Menlo Park, tops this list with the largest team on record.

Which city has the most association consulting firms?

New York leads with 231 headquartered companies, followed by Chicago (134) and Washington (133).

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 43,285 verified decision-maker contacts tracked across these 5,946 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.