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Company lists · Data refreshed September 2026

Top 25 Consultancy agencies based in the United States

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 34,075 companies tracked

RevenueBase identified 34,075 consultancy agencies headquartered in the United States as of September 2026 and tracks 296,537 professional contacts across them, including 106,382 with verified work emails and 92,169 with mobile numbers. New York is the largest hub.

This list covers consultancy agencies 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
34,075Companies
296,537Contacts tracked
106,382Verified emails
92,169Mobile numbers
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The 25 largest consultancy agencies based in the United States

Ranked by team size
Top 25 of 34,075 consultancy agencies 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 agencies: 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
1
Boston Consulting Group BCG
Indirect evidenceBoston, MA, United StatesHQ checked Sep 24, 202610001+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 evidenceBoston, MA, United StatesHQ checked Sep 24, 202610001+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
Alvarez & Marsal
Indirect evidenceNew York, NY, United StatesHQ checked Sep 24, 202610001+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
4
Protiviti
Indirect evidenceMenlo Park, CA, United StatesHQ checked Sep 24, 20265,001-10,0008,779 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
5
Kearney
Indirect evidenceChicago, IL, United StatesHQ checked Sep 24, 20265,001-10,0006,978 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
6
Accenture Strategy & Consulting
Indirect evidenceChicago, IL, United StatesHQ checked Sep 24, 20265,001-10,0005,514 contacts →

Indirect evidence

“Accenture Strategy combines deep industry expertise, advanced analytics capabilities and human-led design methodologies that enable clients to act with speed and confidence.”

Source: RevenueBase Database · checked Sep 24, 2026
7
Strategy
Indirect evidenceNew York, NY, United StatesHQ checked Sep 24, 20261,001-5,0005,082 contacts →

Indirect evidence

“From strategy to execution.”

Source: RevenueBase Database · checked Sep 24, 2026
8
Bank Of The West
Indirect evidenceChicago, IL, United StatesHQ checked Sep 24, 2026n/a4,751 contacts →

Indirect evidence

“We help businesses and nonprofits grow, communicate, and succeed, professionally and affordably.”

Source: RevenueBase Database · checked Sep 24, 2026
9
L.E.K. Consulting
Indirect evidenceBoston, MA, United StatesHQ checked Sep 24, 20261,001-5,0004,093 contacts →

Indirect evidence

“L.E.K.”

Source: RevenueBase Database · checked Sep 24, 2026
10
Alixpartners
Indirect evidenceNew York, NY, United StatesHQ checked Sep 24, 20261,001-5,0003,583 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
11
Frost & Sullivan
Indirect evidenceSan Antonio, TX, United StatesHQ checked Sep 24, 20261,001-5,0002,330 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
12
TMS
Indirect evidenceChicago, IL, United StatesHQ checked Sep 24, 20261,001-5,0001,688 contacts →

Indirect evidence

“tms unites technology and marketing and sourcing to drive transformational change for the world’s leading brands.”

Source: RevenueBase Database · checked Sep 24, 2026
13
MCA
Indirect evidenceWestport, CT, United StatesHQ checked Sep 24, 2026n/a1,650 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
14
Cumming Group
Indirect evidenceNew York, NY, United StatesHQ checked Sep 24, 20261,001-5,0001,612 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
15
W3global
Indirect evidenceFrisco, TX, United StatesHQ checked Sep 24, 2026501-1,0001,149 contacts →

Indirect 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 24, 2026
16
The Vertex Companies LLC
Indirect evidenceNew York, NY, United StatesHQ checked Sep 24, 2026501-1,000765 contacts →

Indirect 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 24, 2026
17
Lucas Group
Indirect evidenceLos Angeles, CA, United StatesHQ checked Sep 24, 202610001+756 contacts →

Indirect 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 24, 2026
18
Archetype
Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 2026501-1,000751 contacts →

Indirect evidence

“Setting the standard for the next generation of global agencies, Archetype partners with category creators and industry leaders to build the world’s most magnetic brands.”

Source: RevenueBase Database · checked Sep 24, 2026
19
MSV International, INC
Strong evidenceKenmore, WA, United StatesHQ checked Sep 24, 2026501-1,000718 contacts →

Strong evidence

“MSV International Inc.(ISO 9001 : 2015 Certified Company) is a multidisciplinary consultancy firm and is registered as a corporation in the State of Washington, USA.”

Source: RevenueBase Database · checked Sep 24, 2026
20
DONER
Indirect evidenceSouthfield, MI, United StatesHQ checked Sep 24, 2026501-1,000708 contacts →

Indirect evidence

“Doner unlocks all the tools of Modern marketing to build lasting connections with every day, Main Street consumers.”

Source: RevenueBase Database · checked Sep 24, 2026
21
Team ONE
Indirect evidenceLos Angeles, CA, United StatesHQ checked Sep 24, 2026201-500698 contacts →

Indirect evidence

“Team One was founded with one philosophical focus: to construct brands of elevated aspiration and worth by attracting affluent consumers like never before.”

Source: RevenueBase Database · checked Sep 24, 2026
22
Prophet
Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 2026501-1,000661 contacts →

Indirect evidence

“Prophet is the Uncommon Growth Company-accelerating impact for business and marketing leaders through consulting, experience, and creative services.”

Source: RevenueBase Database · checked Sep 24, 2026
23
Analytix Solutions
Indirect evidenceWoburn, MA, United StatesHQ checked Sep 24, 2026501-1,000640 contacts →

Indirect evidence

“Welcome to Analytix Solutions!”

Source: RevenueBase Database · checked Sep 24, 2026
24
SEI
Indirect evidenceCincinnati, OH, United StatesHQ checked Sep 24, 2026501-1,000618 contacts →

Indirect evidence

“SEI is a management consulting firm delivering fresh perspectives and reliable results.”

Source: RevenueBase Database · checked Sep 24, 2026
25
JPL
Indirect evidenceHarrisburg, PA, United StatesHQ checked Sep 24, 2026n/a609 contacts →

Indirect evidence

“JPL is a full-service agency dedicated to helping clients achieve more.”

Source: RevenueBase Database · checked Sep 24, 2026

Showing 25 of 34,075 consultancy agencies based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 106,382 reachable decision-makers.

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Consultancy agencies based in the United States at a glance

As of Sep 24, 2026
35.9%Verified-email coverage
31.1%Mobile-number coverage
8.7Average 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
28,028
11-50
4,787
51-200
894
201-500
187
501-1,000
75
1,001-5,000
50
5,001-10,000
8
10001+
23

Freshness & accuracy

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

Email last verified

Median 27.0d

Company record updated

Median 73.0d

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 agencies, 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 agencies”. 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 agencies), 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 agencies, 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, 106,382 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 agencies 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 agencies, 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 agencies are there based in the United States?

RevenueBase identified 34,075 consultancy agencies 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 agencies?

New York leads with 2033 headquartered companies, followed by Los Angeles (916) and Chicago (845).

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 106,382 verified decision-maker contacts tracked across these 34,075 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.

Ready to reach these companies? Verified emails and direct dials for all 34,075 consultancy agencies based in the United States. Start with a free account, no credit card.

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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.

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