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Company lists · Data refreshed September 2026

Top 25 Business consultancy firms based in the United States

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 25,700 companies tracked

RevenueBase identified 25,700 business consultancy firms headquartered in the United States as of September 2026 and tracks 352,655 professional contacts across them, including 137,570 with verified work emails and 94,395 with mobile numbers. New York is the largest hub.

This list covers business 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 23, 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 23, 2026 86% judged on-target in blind review
25,700Companies
352,655Contacts tracked
137,570Verified emails
94,395Mobile numbers
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The 25 largest business consultancy firms based in the United States

Ranked by team size
Top 25 of 25,700 business consultancy firms based in the United States, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to business 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1
EXL
Indirect evidenceNew York, NY, United StatesHQ checked Sep 23, 202610001+40,100 contacts →

Indirect evidence

“Choosing a digital partner is about more than capabilities, it’s about collaboration and character.”

Source: RevenueBase Database · checked Sep 23, 2026
2
Boston Consulting Group BCG
Indirect evidenceBoston, MA, United StatesHQ checked Sep 23, 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 23, 2026
3
Bain & Company
Strong evidenceBoston, MA, United StatesHQ checked Sep 23, 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 23, 2026
4
ZS
Indirect evidenceEvanston, IL, United StatesHQ checked Sep 23, 202610001+16,896 contacts →

Indirect evidence

“ZS is a management consulting and technology firm that partners with companies to improve life and how we live it.”

Source: RevenueBase Database · checked Sep 23, 2026
5
Korn Ferry
Indirect evidenceLos Angeles, CA, United StatesHQ checked Sep 23, 202610001+13,486 contacts →

Indirect evidence

“Korn Ferry is a global consulting firm that powers performance.”

Source: RevenueBase Database · checked Sep 23, 2026
6
Alvarez & Marsal
Indirect evidenceNew York, NY, United StatesHQ checked Sep 23, 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 23, 2026
7
Protiviti
Indirect evidenceMenlo Park, CA, United StatesHQ checked Sep 23, 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 23, 2026
8
Oliver Wyman
Indirect evidenceNew York, NY, United StatesHQ checked Sep 23, 20265,001-10,0008,230 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 23, 2026
9
Kearney
Indirect evidenceChicago, IL, United StatesHQ checked Sep 23, 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 23, 2026
10
Accenture Strategy & Consulting
Indirect evidenceChicago, IL, United StatesHQ checked Sep 23, 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 23, 2026
11
Strategy
Indirect evidenceNew York, NY, United StatesHQ checked Sep 23, 20261,001-5,0005,082 contacts →

Indirect evidence

“From strategy to execution.”

Source: RevenueBase Database · checked Sep 23, 2026
12
L.E.K. Consulting
Indirect evidenceBoston, MA, United StatesHQ checked Sep 23, 20261,001-5,0004,093 contacts →

Indirect evidence

“L.E.K.”

Source: RevenueBase Database · checked Sep 23, 2026
13
Alixpartners
Indirect evidenceNew York, NY, United StatesHQ checked Sep 23, 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 23, 2026
14
Frost & Sullivan
Indirect evidenceSan Antonio, TX, United StatesHQ checked Sep 23, 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 23, 2026
15
North Highland
Indirect evidenceAtlanta, GA, United StatesHQ checked Sep 23, 20261,001-5,0001,792 contacts →

Indirect evidence

“North Highland helps businesses move from strategy to reality, taking a pragmatic and practical approach to build solutions that work and create impact that lasts.”

Source: RevenueBase Database · checked Sep 23, 2026
16
MCA
Indirect evidenceWestport, CT, United StatesHQ checked Sep 23, 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 23, 2026
17
Argano
Strong evidencePlano, TX, United StatesHQ checked Sep 23, 20261,001-5,0001,603 contacts →

Strong evidence

“Argano is the world’s first and largest digital services consultancy focused exclusively on enabling high performance across our clients’ business operations, at scale and around…”

Source: RevenueBase Database · checked Sep 23, 2026
18
Trace3
Indirect evidenceIrvine, CA, United StatesHQ checked Sep 23, 20261,001-5,0001,345 contacts →

Indirect evidence

“Trace3 delivers business transformation.”

Source: RevenueBase Database · checked Sep 23, 2026
19
Ardurra
Indirect evidenceMiami, FL, United StatesHQ checked Sep 23, 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 23, 2026
20
Riveron
Indirect evidenceDallas, TX, United StatesHQ checked Sep 23, 20261,001-5,0001,160 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 23, 2026
21
W3global
Indirect evidenceFrisco, TX, United StatesHQ checked Sep 23, 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 23, 2026
22
Navigant
Indirect evidenceChicago, IL, United StatesHQ checked Sep 23, 20265,001-10,0001,029 contacts →

Indirect evidence

“Guidehouse is a leading global provider of consulting services to the public and commercial markets with broad capabilities in management, technology, and risk consulting.”

Source: RevenueBase Database · checked Sep 23, 2026
23
Eliassen Group
Indirect evidenceReading, MA, United StatesHQ checked Sep 23, 20261,001-5,000917 contacts →

Indirect evidence

“Eliassen Group is a strategic consulting firm that helps organizations achieve more through technology, business advisory, and life sciences solutions.”

Source: RevenueBase Database · checked Sep 23, 2026
24
Porter Novelli
Indirect evidenceNew York, NY, United StatesHQ checked Sep 23, 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 23, 2026
25
Impact Advisors
Indirect evidenceNaperville, IL, United StatesHQ checked Sep 23, 2026501-1,000801 contacts →

Indirect evidence

“Impact Advisors is a leading healthcare management consulting firm committed to solving the industry’s emerging and evolving challenges.”

Source: RevenueBase Database · checked Sep 23, 2026

Showing 25 of 25,700 business consultancy firms based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 137,570 reachable decision-makers.

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Business consultancy firms based in the United States at a glance

As of Sep 23, 2026
39.0%Verified-email coverage
26.8%Mobile-number coverage
13.7Average contacts per company
1-10Median size (employees)
4.4%Largest-city concentration · New York
Sep 23, 2026Page data refreshed

Companies by employee count

1-10
20,438
11-50
3,871
51-200
1,004
201-500
205
501-1,000
71
1,001-5,000
56
5,001-10,000
15
10001+
22

Freshness & accuracy

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

Email last verified

Median 26.0d

Company record updated

Median 70.0d

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 business 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 “business 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 business 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 business 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, 137,570 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 23, 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.

Business 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 business 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 business consultancy firms are there based in the United States?

RevenueBase identified 25,700 business 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?

EXL, headquartered in New York, tops this list with the largest team on record.

Which city has the most business consultancy firms?

New York leads with 1120 headquartered companies, followed by Atlanta (664) and Chicago (622).

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 137,570 verified decision-maker contacts tracked across these 25,700 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 23, 2026.

Ready to reach these companies? Verified emails and direct dials for all 25,700 business consultancy firms 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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