Company lists · Data refreshed September 2026

Top 25 Impact consulting firms based in the United States

Name: Impact 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 30, 2026 32,575 companies tracked

RevenueBase identified 32,575 company matches for impact consulting firms associated with the United States as of September 2026 and tracks 466,752 professional contacts across them, including 198,038 with verified work emails and 145,214 with mobile numbers. New York is the largest hub.

This list covers company matches for impact 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 30, 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 30, 2026 How this list was built

32,575Companies

466,752Contacts tracked

198,038Verified emails

145,214Mobile numbers

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The 25 largest impact consulting firms based in the United States

Ranked by team size

Top 25 of 32,575 company matches for impact consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 30, 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	Boston Consulting Group BCG	Exact match	Boston, MA, United StatesHQ recorded Sep 30, 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 30, 2026 · View company records in RevenueBase
2	Bain & Company	Exact match	Boston, MA, United StatesHQ recorded Sep 30, 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 30, 2026 · View company records in RevenueBase
3	Mercer	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	10001+	20,868 contacts →
	Exact match “At Mercer, A Marsh business, we’re helping our clients realize their investment objectives, shape the future of work, and enhance health and retirement outcomes for their people.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
4	ZS	Exact match	Evanston, IL, United StatesHQ recorded Sep 30, 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 30, 2026 · View company records in RevenueBase
5	Korn Ferry	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 30, 2026	10001+	13,486 contacts →
	Exact match “Korn Ferry is a global consulting firm that powers performance.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
6	Alvarez & Marsal	Exact match	New York, NY, United StatesHQ recorded Sep 30, 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 30, 2026 · View company records in RevenueBase
7	WSP In The U.S	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	10001+	9,318 contacts →
	Exact match “What if you could shape built and natural environments – and the future of those that use them?” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
8	FTI Consulting	Exact match	Washington, DC, United StatesHQ recorded Sep 30, 2026	5,001-10,000	8,964 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
9	Protiviti	Exact match	Menlo Park, CA, United StatesHQ recorded Sep 30, 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 30, 2026 · View company records in RevenueBase
10	Oliver Wyman	Exact match	New York, NY, United StatesHQ recorded Sep 30, 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 30, 2026 · View company records in RevenueBase
11	HURON	Exact match	Chicago, IL, United StatesHQ recorded Sep 30, 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 30, 2026 · View company records in RevenueBase
12	Kearney	Exact match	Chicago, IL, United StatesHQ recorded Sep 30, 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 30, 2026 · View company records in RevenueBase
13	Tiger Analytics	Exact match	Santa Clara, CA, United StatesHQ recorded Sep 30, 2026	5,001-10,000	6,160 contacts →
	Exact match “In a world rife with complexity, we help our customers cut through uncertainty, plan strategically, and execute confidently.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
14	Accenture Strategy & Consulting	Exact match	Chicago, IL, United StatesHQ recorded Sep 30, 2026	5,001-10,000	5,514 contacts →
	Exact match “Accenture Strategy combines deep industry expertise, advanced analytics capabilities and human-led design methodologies that enable clients to act with speed and confidence.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
15	Strategy	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	1,001-5,000	5,082 contacts →
	Exact match “From strategy to execution.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
16	Bank Of The West	Exact match	Chicago, IL, United StatesHQ recorded Sep 30, 2026	n/a	4,751 contacts →
	Exact match “We help businesses and nonprofits grow, communicate, and succeed, professionally and affordably.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
17	L.E.K. Consulting	Exact match	Boston, MA, United StatesHQ recorded Sep 30, 2026	1,001-5,000	4,093 contacts →
	Exact match “L.E.K.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
18	Alixpartners	Exact match	New York, NY, United StatesHQ recorded Sep 30, 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 30, 2026 · View company records in RevenueBase
19	Heidrick & Struggles	Exact match	Chicago, IL, United StatesHQ recorded Sep 30, 2026	1,001-5,000	3,376 contacts →
	Exact match “Heidrick & Struggles is the premier provider of executive search, corporate culture and leadership consulting services.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
20	ABT Global	Exact match	Rockville, MD, United StatesHQ recorded Sep 30, 2026	1,001-5,000	3,323 contacts →
	Exact match “Abt is a mission-driven consulting and research firm.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
21	ETEAM	Exact match	Somerset, NJ, United StatesHQ recorded Sep 30, 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 30, 2026 · View company records in RevenueBase
22	Frost & Sullivan	Exact match	San Antonio, TX, United StatesHQ recorded Sep 30, 2026	1,001-5,000	2,330 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
23	BRG	Exact match	Washington, DC, United StatesHQ recorded Sep 30, 2026	1,001-5,000	2,051 contacts →
	Exact match “BRG combines world-leading academic credentials with world-tested business expertise, purpose-built for agility and connectivity, which sets us apart-and gets our clients ahead.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
24	Ankura	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	1,001-5,000	2,047 contacts →
	Exact match “Ankura Consulting Group, LLC (“Ankura”) is a leading global consulting and expert advisory firm that partners with organizations at critical inflection points.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
25	Gallup	Exact match	Washington, DC, United StatesHQ recorded Sep 30, 2026	1,001-5,000	2,026 contacts →
	Exact match “Gallup delivers analytics and advice to help leaders and organizations solve their most pressing problems.” Recorded in the RevenueBase company graph · Sep 30, 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 “impact 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 32,575 impact consulting firms based in the United States

See the full list, filter by size, metro and specialty, and access 198,038 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Impact consulting firms based in the United States at a glance

As of Sep 30, 2026

42.4%Verified-email coverage

31.1%Mobile-number coverage

14.3Average contacts per company

1-10Median size (employees)

6.0%Largest-city concentration · New York

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

25,871

11-50

5,105

51-200

1,133

201-500

232

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 33.0d

57,9700–30

129,64731–60

7,77661–90

20490–180

2,441180+

Company record updated

Median 75.0d

00–30

100,21531–60

170,54861–90

167,44090–180

28,549180+

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 “impact 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 198,038 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 30, 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.

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

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

RevenueBase identified 32,575 company matches for impact 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?

Boston Consulting Group BCG tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most impact consulting firms?

New York leads with 1952 company records, followed by Chicago (974) and Washington (937).

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 198,038 professional contacts with verified work emails tracked across these 32,575 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 30, 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.