Company lists · Data refreshed September 2026

Top 25 Consultancy firms based in the United States

Name: Consultancy 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 24, 2026 32,029 companies tracked

RevenueBase identified 32,029 consultancy firms headquartered in the United States as of September 2026 and tracks 402,003 professional contacts across them, including 151,794 with verified work emails and 125,429 with mobile numbers. New York is the largest hub.

This list covers consultancy 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 24, 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 24, 2026 86% judged on-target in blind review

32,029Companies

402,003Contacts tracked

151,794Verified emails

125,429Mobile numbers

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The 25 largest consultancy firms based in the United States

Ranked by team size

Top 25 of 32,029 consultancy firms based in the United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to consultancy 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	Boston Consulting Group BCG	Indirect evidence	Boston, MA, United StatesHQ checked Sep 24, 2026	10001+	38,730 contacts →
	Indirect evidence “Boston Consulting Group partners with leaders in business and society to tackle their most important challenges and capture their greatest opportunities.” Source: RevenueBase Database · checked Sep 24, 2026
2	Bain & Company	Strong evidence	Boston, MA, United StatesHQ checked Sep 24, 2026	10001+	21,689 contacts →
	Strong evidence “Bain & Company is a global consultancy that helps the world’s most ambitious change makers define the future.” Source: RevenueBase Database · checked Sep 24, 2026
3	Korn Ferry	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 24, 2026	10001+	13,486 contacts →
	Indirect evidence “Korn Ferry is a global consulting firm that powers performance.” Source: RevenueBase Database · checked Sep 24, 2026
4	Alvarez & Marsal	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	10001+	13,099 contacts →
	Indirect evidence “Alvarez & Marsal is a leading global professional services firm dedicated to helping organizations tackle their most complex business issues, maximize stakeholder value, and…” Source: RevenueBase Database · checked Sep 24, 2026
5	Protiviti	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 24, 2026	5,001-10,000	8,779 contacts →
	Indirect 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 24, 2026
6	Oliver Wyman	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	5,001-10,000	8,230 contacts →
	Indirect evidence “At Oliver Wyman, a Marsh business, we bring deep industry insight, bold innovation, and a collaborative approach that cuts through complexity to help organizations navigate their…” Source: RevenueBase Database · checked Sep 24, 2026
7	Kearney	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 24, 2026	5,001-10,000	6,978 contacts →
	Indirect 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 24, 2026
8	CBIZ	Indirect evidence	Independence, OH, United StatesHQ checked Sep 24, 2026	10001+	6,369 contacts →
	Indirect evidence “CBIZ, Inc.(NYSE: CBZ) is a leading professional services advisor to middle-market businesses nationwide.” Source: RevenueBase Database · checked Sep 24, 2026
9	Eisneramper	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	1,001-5,000	4,199 contacts →
	Indirect 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 24, 2026
10	L.E.K. Consulting	Indirect evidence	Boston, MA, United StatesHQ checked Sep 24, 2026	1,001-5,000	4,093 contacts →
	Indirect evidence “L.E.K.” Source: RevenueBase Database · checked Sep 24, 2026
11	DAI	Indirect evidence	Bethesda, MD, United StatesHQ checked Sep 24, 2026	5,001-10,000	3,741 contacts →
	Indirect evidence “DAI is an integrated professional services and advisory firm that provides project design and delivery, management consulting, and financial services to companies, investors, and…” Source: RevenueBase Database · checked Sep 24, 2026
12	Alixpartners	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	1,001-5,000	3,583 contacts →
	Indirect evidence “For more than forty years, AlixPartners has helped businesses around the world respond quickly and decisively to their most critical challenges – circumstances as diverse as…” Source: RevenueBase Database · checked Sep 24, 2026
13	Withum	Indirect evidence	Princeton, NJ, United StatesHQ checked Sep 24, 2026	1,001-5,000	3,326 contacts →
	Indirect evidence “Withum is a forward-thinking, technology-driven advisory and accounting firm, helping clients to Be in a Position of Strength in today’s modern business landscape.” Source: RevenueBase Database · checked Sep 24, 2026
14	Genpact Headstrong Capital Markets	Indirect evidence	Reston, VA, United StatesHQ checked Sep 24, 2026	10001+	3,109 contacts →
	Indirect evidence “Genpact Headstrong Capital Markets is a global consulting and IT services company with a specialized focus in capital markets.” Source: RevenueBase Database · checked Sep 24, 2026
15	Wipfli	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 24, 2026	1,001-5,000	3,047 contacts →
	Indirect evidence “Always advancing.” Source: RevenueBase Database · checked Sep 24, 2026
16	Frost & Sullivan	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,330 contacts →
	Indirect evidence “For over six decades, Frost & Sullivan has helped the world’s top companies toward transformational growth journeys that result in a stream of innovative growth opportunities.” Source: RevenueBase Database · checked Sep 24, 2026
17	BRG	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,051 contacts →
	Indirect evidence “BRG combines world-leading academic credentials with world-tested business expertise, purpose-built for agility and connectivity, which sets us apart-and gets our clients ahead.” Source: RevenueBase Database · checked Sep 24, 2026
18	MCA	Indirect evidence	Westport, CT, United StatesHQ checked Sep 24, 2026	n/a	1,650 contacts →
	Indirect evidence “MCAworks is a strategic marketing consulting firm passionately dedicated to helping our clients accelerate and sustain business growth.” Source: RevenueBase Database · checked Sep 24, 2026
19	Cumming Group	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,612 contacts →
	Indirect evidence “At Cumming Group, we are passionate about helping our clients execute large-scale, complex projects on time and within budget.” Source: RevenueBase Database · checked Sep 24, 2026
20	Kpff Consulting Engineers	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,487 contacts →
	Indirect evidence “KPFF is a multi-office, multi-discipline engineering firm.” Source: RevenueBase Database · checked Sep 24, 2026
21	Charles River Associates	Indirect evidence	Boston, MA, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,479 contacts →
	Indirect evidence “Charles River Associates (CRA) is a global consulting firm specializing in litigation, regulatory, financial, and management consulting.” Source: RevenueBase Database · checked Sep 24, 2026
22	Davey Resource Group, INC	Indirect evidence	Kent, OH, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,395 contacts →
	Indirect evidence “Davey Resource Group, Inc.(DRG) provides innovative consulting and field services that support utility infrastructure and environmental stewardship.” Source: RevenueBase Database · checked Sep 24, 2026
23	Rehmann	Indirect evidence	Troy, MI, United StatesHQ checked Sep 24, 2026	501-1,000	1,323 contacts →
	Indirect evidence “Rehmann is a professional advisory firm that provides accounting and assurance, business solutions and outsourcing, specialized consulting, and wealth management services.” Source: RevenueBase Database · checked Sep 24, 2026
24	Ardurra	Indirect evidence	Miami, FL, United StatesHQ checked Sep 24, 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 24, 2026
25	Cornerstone Research	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 24, 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 24, 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: consultancy 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 consultancy firms.
Partial evidence: Its own public description names part of consultancy firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name consultancy 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 32,029 consultancy firms based in the United States

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Consultancy firms based in the United States at a glance

As of Sep 24, 2026

37.8%Verified-email coverage

31.2%Mobile-number coverage

12.6Average contacts per company

1-10Median size (employees)

6.0%Largest-city concentration · New York

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

24,617

11-50

5,564

51-200

1,329

201-500

277

501-1,000

110

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 26.0d

112,2970–30

34,32431–60

3,70361–90

12890–180

1,342180+

Company record updated

Median 75.0d

00–30

119,88631–60

171,15261–90

89,44590–180

21,520180+

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 consultancy 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 “consultancy 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 consultancy 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 consultancy 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, 151,794 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 24, 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.

Consultancy 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 consultancy 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 consultancy firms are there based in the United States?

RevenueBase identified 32,029 consultancy 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?

Boston Consulting Group BCG, headquartered in Boston, tops this list with the largest team on record.

Which city has the most consultancy firms?

New York leads with 1923 headquartered companies, followed by Chicago (827) and Atlanta (777).

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 151,794 verified decision-maker contacts tracked across these 32,029 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 24, 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.