Company lists · Data refreshed September 2026

Top 25 Transformation consulting firms based in the United States

Name: Transformation 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 6, 2026 33,718 companies tracked

RevenueBase identified 33,718 transformation consulting firms headquartered in the United States as of September 2026 and tracks 817,330 professional contacts across them, including 290,582 with verified work emails and 192,470 with mobile numbers. New York is the largest hub.

This list covers transformation consulting 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 6, 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 6, 2026 86% judged on-target in blind review

33,718Companies

817,330Contacts tracked

290,582Verified emails

192,470Mobile numbers

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The 25 largest transformation consulting firms based in the United States

Ranked by team size

Top 25 of 33,718 transformation consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to transformation consulting 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	EXL	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	10001+	40,100 contacts →
	“Choosing a digital partner is about more than capabilities, it’s about collaboration and character.” Source: company website · checked Sep 6, 2026
2	Boston Consulting Group BCG	Partial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	10001+	38,730 contacts →
	“Boston Consulting Group partners with leaders in business and society to tackle their most important challenges and capture their greatest opportunities.” Source: company website · checked Sep 6, 2026
3	UST	Partial evidence	Aliso Viejo, CA, United StatesHQ checked Sep 6, 2026	10001+	34,875 contacts →
	“UST is a global digital transformation solutions provider.” Source: company website · checked Sep 6, 2026
4	Teksystems	Indirect evidence	Hanover, MD, United StatesHQ checked Sep 6, 2026	10001+	24,693 contacts →
	“We’re TEKsystems and TEKsystems Global Services.” Source: company website · checked Sep 6, 2026
5	Bain & Company	Indirect evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	10001+	21,689 contacts →
	“Bain & Company is a global consultancy that helps the world’s most ambitious change makers define the future.” Source: company website · checked Sep 6, 2026
6	ZS	Partial evidence	Evanston, IL, United StatesHQ checked Sep 6, 2026	10001+	16,896 contacts →
	“ZS is a management consulting and technology firm that partners with companies to improve life and how we live it.” Source: company website · checked Sep 6, 2026
7	Korn Ferry	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 6, 2026	10001+	13,486 contacts →
	“Korn Ferry is a global consulting firm that powers performance.” Source: company website · checked Sep 6, 2026
8	Alvarez & Marsal	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	10001+	13,099 contacts →
	“Alvarez & Marsal is a leading global professional services firm dedicated to helping organizations tackle their most complex business issues, maximize stakeholder value, and…” Source: company website · checked Sep 6, 2026
9	Synechron	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	10001+	12,820 contacts →
	“At Synechron, we believe in the power of digital to transform businesses for the better.” Source: company website · checked Sep 6, 2026
10	Guidehouse	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 6, 2026	10001+	12,815 contacts →
	“Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors.” Source: company website · checked Sep 6, 2026
11	Slalom	Partial evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	10001+	10,032 contacts →
	“Slalom is a fiercely human business and technology consulting company that leads with outcomes to bring more value, in all ways, always.” Source: company website · checked Sep 6, 2026
12	FTI Consulting	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	5,001-10,000	8,964 contacts →
	“FTI Consulting is the leading global expert firm for organizations facing crisis and transformation, with more than 8,100 employees in 32 countries and territories.” Source: company website · checked Sep 6, 2026
13	Protiviti	Partial evidence	Menlo Park, CA, United StatesHQ checked Sep 6, 2026	5,001-10,000	8,779 contacts →
	“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: company website · checked Sep 6, 2026
14	Oliver Wyman	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	5,001-10,000	8,230 contacts →
	“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: company website · checked Sep 6, 2026
15	Ci&t	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	5,001-10,000	8,037 contacts →
	“We are your global partner in tech-integrated business solutions, turning AI ambition into measurable business impact.” Source: company website · checked Sep 6, 2026
16	Yash Technologies	Strong evidence	East Moline, IL, United StatesHQ checked Sep 6, 2026	5,001-10,000	7,769 contacts →
	“YASH Technologies is a consulting-led transformation partner with a proven track record of helping customers address their current and prospective digital transformation…” Source: company website · checked Sep 6, 2026
17	HURON	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 6, 2026	5,001-10,000	7,520 contacts →
	“Huron is a global professional services firm that collaborates with organizations to solve complex challenges and achieve ambitious goals.” Source: company website · checked Sep 6, 2026
18	Kearney	Partial evidence	Chicago, IL, United StatesHQ checked Sep 6, 2026	5,001-10,000	6,978 contacts →
	“As one of the original firms, we’ve never lost sight of the fact that consulting is a people business.” Source: company website · checked Sep 6, 2026
19	Tiger Analytics	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 6, 2026	5,001-10,000	6,160 contacts →
	“In a world rife with complexity, we help our customers cut through uncertainty, plan strategically, and execute confidently.” Source: company website · checked Sep 6, 2026
20	Accenture Strategy & Consulting	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 6, 2026	5,001-10,000	5,514 contacts →
	“Accenture Strategy combines deep industry expertise, advanced analytics capabilities and human-led design methodologies that enable clients to act with speed and confidence.” Source: company website · checked Sep 6, 2026
21	XEBIA	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 6, 2026	1,001-5,000	5,116 contacts →
	“Xebia is a global, award-winning, AI-first consulting, software engineering, and training company.” Source: company website · checked Sep 6, 2026
22	Merkle	Indirect evidence	Columbia, MD, United StatesHQ checked Sep 6, 2026	10001+	4,731 contacts →
	“Merkle, a dentsu company, powers the experience economy.” Source: company website · checked Sep 6, 2026
23	Aricent	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 6, 2026	10001+	4,302 contacts →
	“Aricent is now Altran, delivering industry innovations at future speed.” Source: company website · checked Sep 6, 2026
24	L.E.K. Consulting	Indirect evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1,001-5,000	4,093 contacts →
	“L.E.K.” Source: company website · checked Sep 6, 2026
25	RGP	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 6, 2026	1,001-5,000	3,650 contacts →
	“RGP (Nasdaq: RGP) is an award-winning global professional services firm with three decades of experience helping the world’s top organizations navigate change and seize…” Source: company website · checked Sep 6, 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: transformation consulting 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 transformation consulting firms.
Partial evidence: Its own public description names part of transformation consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name transformation consulting 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 33,718 transformation consulting firms based in the United States

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Transformation consulting firms based in the United States at a glance

As of Sep 6, 2026

35.6%Verified-email coverage

23.5%Mobile-number coverage

24.2Average contacts per company

1-10Median size (employees)

4.6%Largest-city concentration · New York

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

24,134

11-50

6,255

51-200

2,257

201-500

573

501-1,000

209

1,001-5,000

181

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

265,3480–30

20,55731–60

23361–90

15590–180

4,289180+

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 transformation consulting 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 “transformation consulting 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 transformation consulting 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 transformation consulting 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, 290,582 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 6, 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.

Transformation consulting 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 transformation consulting 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 transformation consulting firms are there based in the United States?

RevenueBase identified 33,718 transformation consulting 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 transformation consulting firms?

New York leads with 1566 headquartered companies, followed by Chicago (907) and Atlanta (874).

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 290,582 verified decision-maker contacts tracked across these 33,718 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 6, 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.