Company lists · Data refreshed September 2026

Top 25 Tier one consulting firms based in the United States

Name: Tier one 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 29, 2026 7,780 companies tracked

RevenueBase identified 7,780 company matches for tier one consulting firms associated with the United States as of September 2026 and tracks 297,740 professional contacts across them, including 124,935 with verified work emails. New York is the largest hub.

This list covers company matches for tier one consulting firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 29, 2026 How this list was built

7,780Companies

297,740Contacts tracked

124,935Verified emails

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The 25 largest tier one consulting firms based in the United States

Ranked by team size

Top 25 of 7,780 company matches for tier one consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	EXL	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	10001+	40,100 contacts →
	Exact match “Choosing a digital partner is about more than capabilities, it’s about collaboration and character.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	Boston Consulting Group BCG	Exact match	Boston, MA, United StatesHQ recorded Sep 29, 2026	10001+	38,730 contacts →
	Exact match “Boston Consulting Group partners with leaders in business and society to tackle their most important challenges and capture their greatest opportunities.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	ZS	Exact match	Evanston, IL, United StatesHQ recorded Sep 29, 2026	10001+	16,896 contacts →
	Exact match “ZS is a management consulting and technology firm that partners with companies to improve life and how we live it.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	Korn Ferry	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 29, 2026	10001+	13,486 contacts →
	Exact match “Korn Ferry is a global consulting firm that powers performance.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Alvarez & Marsal	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	10001+	13,099 contacts →
	Exact match “Alvarez & Marsal is a leading global professional services firm dedicated to helping organizations tackle their most complex business issues, maximize stakeholder value, and…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	Slalom	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	10001+	10,032 contacts →
	Exact match “Slalom is a fiercely human business and technology consulting company that leads with outcomes to bring more value, in all ways, always.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	Protiviti	Exact match	Menlo Park, CA, United StatesHQ recorded Sep 29, 2026	5,001-10,000	8,779 contacts →
	Exact match “Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	Oliver Wyman	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	5,001-10,000	8,230 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	Yash Technologies	Exact match	East Moline, IL, United StatesHQ recorded Sep 29, 2026	5,001-10,000	7,769 contacts →
	Exact match “YASH Technologies is a consulting-led transformation partner with a proven track record of helping customers address their current and prospective digital transformation…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	HURON	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	5,001-10,000	7,520 contacts →
	Exact match “Huron is a global professional services firm that collaborates with organizations to solve complex challenges and achieve ambitious goals.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	Kearney	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	5,001-10,000	6,978 contacts →
	Exact match “As one of the original firms, we’ve never lost sight of the fact that consulting is a people business.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	L.E.K. Consulting	Exact match	Boston, MA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	4,093 contacts →
	Exact match “L.E.K.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	DAI	Exact match	Bethesda, MD, United StatesHQ recorded Sep 29, 2026	5,001-10,000	3,741 contacts →
	Exact match “DAI is an integrated professional services and advisory firm that provides project design and delivery, management consulting, and financial services to companies, investors, and…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	Alixpartners	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	1,001-5,000	3,583 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	Withum	Exact match	Princeton, NJ, United StatesHQ recorded Sep 29, 2026	1,001-5,000	3,326 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	ETEAM	Exact match	Somerset, NJ, United StatesHQ recorded Sep 29, 2026	n/a	3,285 contacts →
	Exact match “For over 25 years, eTeam has been trusted by global organizations to lead high-stakes programs where execution matters as much as strategy.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Armanino	Exact match	San Ramon, CA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,989 contacts →
	Exact match “Founded as an alternative to the status quo, Armanino doesn’t just keep up with change, we embrace it.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	West Monroe	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,129 contacts →
	Exact match “West Monroe is a global business and technology consulting firm passionate about creating value for our clients.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Trace3	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,345 contacts →
	Exact match “Trace3 delivers business transformation.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	Neudesic, An IBM Company	Exact match	Irvine, CA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,239 contacts →
	Exact match “Neudesic, an IBM Company, is a global professional services firm dedicated to advancing businesses with our Microsoft technology expertise.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Crosscountry Consulting	Exact match	Mclean, VA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,215 contacts →
	Exact match “CrossCountry Consulting is a leading provider of specialized advisory and technology solutions across finance, accounting, risk, and operations.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	MJV Technology & Innovation	Exact match	Atlanta, GA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,168 contacts →
	Exact match “We are a global consulting firm that brings together people, technology, and AI to drive business growth and transform organizations with strategy, agility, and impact.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	W3global	Exact match	Frisco, TX, United StatesHQ recorded Sep 29, 2026	501-1,000	1,149 contacts →
	Exact match “W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Navigant	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	5,001-10,000	1,029 contacts →
	Exact match “Guidehouse is a leading global provider of consulting services to the public and commercial markets with broad capabilities in management, technology, and risk consulting.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	Eliassen Group	Exact match	Reading, MA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	917 contacts →
	Exact match “Eliassen Group is a strategic consulting firm that helps organizations achieve more through technology, business advisory, and life sciences solutions.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “tier one consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 7,780 tier one consulting firms based in the United States

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Tier one consulting firms based in the United States at a glance

As of Sep 29, 2026

42.0%Verified-email coverage

38.3Average contacts per company

1-10Median size (employees)

5.6%Largest-city concentration · New York

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

5,114

11-50

1,739

51-200

637

201-500

149

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 7,780 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “tier one consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 124,935 professional contacts with verified work emails across the full matched dataset. 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 29, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Tier one consulting firms by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “tier one consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many tier one consulting firms are there based in the United States?

RevenueBase identified 7,780 company matches for tier one consulting firms associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

EXL tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most tier one consulting firms?

New York leads with 439 company records, followed by Chicago (243) and Atlanta (203).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 124,935 professional contacts with verified work emails tracked across these 7,780 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 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 SmartSearch, 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.