Company lists · Data refreshed September 2026

Top 25 Big 5 consulting firms based in the United States

Name: Big 5 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 23, 2026 13,047 companies tracked

RevenueBase identified 13,047 company matches for big 5 consulting firms associated with the United States as of September 2026 and tracks 431,115 professional contacts across them, including 173,772 with verified work emails and 117,550 with mobile numbers. New York is the largest hub.

This list covers company matches for big 5 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 23, 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 23, 2026 How this list was built

13,047Companies

431,115Contacts tracked

173,772Verified emails

117,550Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest big 5 consulting firms based in the United States

Ranked by team size

Top 25 of 13,047 company matches for big 5 consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 23, 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 23, 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 23, 2026 · View company records in RevenueBase
2	Boston Consulting Group BCG	Exact match	Boston, MA, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
3	Teksystems	Exact match	Hanover, MD, United StatesHQ recorded Sep 23, 2026	10001+	24,693 contacts →
	Exact match “We’re TEKsystems and TEKsystems Global Services.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
4	Bain & Company	Exact match	Boston, MA, United StatesHQ recorded Sep 23, 2026	10001+	21,689 contacts →
	Exact match “Bain & Company is a global consultancy that helps the world’s most ambitious change makers define the future.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
5	ZS	Exact match	Evanston, IL, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
6	Korn Ferry	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 23, 2026	10001+	13,486 contacts →
	Exact match “Korn Ferry is a global consulting firm that powers performance.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
7	Alvarez & Marsal	Exact match	New York, NY, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
8	Guidehouse	Exact match	Mclean, VA, United StatesHQ recorded Sep 23, 2026	10001+	12,815 contacts →
	Exact match “Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
9	Slalom	Exact match	Seattle, WA, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
10	Protiviti	Exact match	Menlo Park, CA, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
11	Oliver Wyman	Exact match	New York, NY, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
12	Yash Technologies	Exact match	East Moline, IL, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
13	HURON	Exact match	Chicago, IL, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
14	Kearney	Exact match	Chicago, IL, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
15	L.E.K. Consulting	Exact match	Boston, MA, United StatesHQ recorded Sep 23, 2026	1,001-5,000	4,093 contacts →
	Exact match “L.E.K.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
16	DAI	Exact match	Bethesda, MD, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
17	Alixpartners	Exact match	New York, NY, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
18	Withum	Exact match	Princeton, NJ, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
19	ETEAM	Exact match	Somerset, NJ, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
20	Wipfli	Exact match	Milwaukee, WI, United StatesHQ recorded Sep 23, 2026	1,001-5,000	3,047 contacts →
	Exact match “Always advancing.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
21	Armanino	Exact match	San Ramon, CA, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
22	VEE Technologies	Exact match	Decatur, GA, United StatesHQ recorded Sep 23, 2026	5,001-10,000	2,933 contacts →
	Exact match “Vee Technologies is a global consulting and professional services organization delivering specialized, technology-enabled solutions.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
23	West Monroe	Exact match	Chicago, IL, United StatesHQ recorded Sep 23, 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 23, 2026 · View company records in RevenueBase
24	TENEO	Exact match	New York, NY, United StatesHQ recorded Sep 23, 2026	1,001-5,000	1,930 contacts →
	Exact match “Teneo is the global CEO advisory firm.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
25	North Highland	Exact match	Atlanta, GA, United StatesHQ recorded Sep 23, 2026	1,001-5,000	1,792 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 23, 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 “big 5 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 13,047 big 5 consulting firms based in the United States

See the full list, filter by size, metro and specialty, and access 173,772 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Big 5 consulting firms based in the United States at a glance

As of Sep 23, 2026

40.3%Verified-email coverage

27.3%Mobile-number coverage

33.0Average contacts per company

1-10Median size (employees)

4.9%Largest-city concentration · New York

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

8,651

11-50

2,878

51-200

1,056

201-500

263

501-1,000

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 25.0d

128,2690–30

39,48231–60

3,13661–90

16590–180

2,720180+

Company record updated

Median 72.0d

00–30

127,13131–60

188,57361–90

90,79790–180

24,614180+

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 “big 5 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 173,772 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 23, 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.

Big 5 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 “big 5 consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many big 5 consulting firms are there based in the United States?

RevenueBase identified 13,047 company matches for big 5 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 big 5 consulting firms?

New York leads with 644 company records, followed by Chicago (350) and Atlanta (336).

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 173,772 professional contacts with verified work emails tracked across these 13,047 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 23, 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.