Company lists · Data refreshed September 2026

Top 25 Impact consulting firms based in New York, United States

Name: Impact consulting firms based in New York, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 1,952 companies tracked

RevenueBase identified 1,952 company matches for impact consulting firms associated with New York, United States as of September 2026 and tracks 85,418 professional contacts across them, including 46,419 with verified work emails. Across the United States, New York is the largest hub for this category.

This list covers company matches for impact consulting firms associated with New York, 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

1,952Companies

85,418Contacts tracked

46,419Verified emails

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

The 25 largest impact consulting firms based in New York, United States

Ranked by team size

Top 25 of 1,952 company matches for impact consulting firms based in New York, 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	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
2	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
3	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
4	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
5	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
6	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
7	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
8	TENEO	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	1,001-5,000	1,930 contacts →
	Exact match “Teneo is the global CEO advisory firm.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
9	FGS Global	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	1,001-5,000	1,814 contacts →
	Exact match “FGS Global is the strategic leadership advisory for a complex world.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
10	Porter Novelli	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	501-1,000	821 contacts →
	Exact match “Porter Novelli is the strategic communications company, fueled by innovation, empowering clients to do business better in an ever-changing world.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
11	The Vertex Companies LLC	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	501-1,000	765 contacts →
	Exact match “The Vertex Companies, LLC is a global consulting firm that provides strategic advisory, project management, and dispute resolution services for organizations that face complex…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
12	Sodali & CO	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	501-1,000	431 contacts →
	Exact match “Sodali & Co advises corporate clients worldwide as they navigate the complex dynamic of shareholder and stakeholder interests.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
13	Keystone	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	201-500	423 contacts →
	Exact match “Keystone is an innovative strategy, economics, and technology consulting firm delivering transformative ideas and novel solutions to global brands and law firms on leading-edge…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
14	Phronesis Partners	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	201-500	337 contacts →
	Exact match “At Phronesis Partners, we turn complexity into clarity for the world's leading organizations.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
15	Seargin	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	501-1,000	276 contacts →
	Exact match “Seargin was founded to close the gap between traditional advisory and hands-on delivery - combining strategic insight with deep expertise in ERP, AI and data.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
16	FULD	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	51-200	269 contacts →
	Exact match “Fuld are competitive strategy advisors that help clients anticipate competitive activity, see beyond market disruptions and develop or refine forward-looking business strategies.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
17	ZEN & ART	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	501-1,000	236 contacts →
	Exact match “Zen & Art is a group of talented and experienced technologists and business practitioners who recognize the need for a simplistic approach amidst mass disruption.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
18	TCC Group	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	n/a	232 contacts →
	Exact match “TCC Group collaborates with leaders to solve complex social problems.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
19	Hr&a Advisors	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	51-200	213 contacts →
	Exact match “HR & A guides decision makers in cities, including mayors and agency heads, real estate owners and developers, and non-profit leaders, to create impact when the stakes are high…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
20	Horwath HTL	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	201-500	198 contacts →
	Exact match “Bold steps forward.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
21	Research Nester Analytics	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	51-200	191 contacts →
	Exact match “Research Nester is a global consulting firm that works with the most aspirational facilitators to define the future market strategies.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
22	Essex Lake Group	Exact match	New York, United StatesHQ recorded Sep 30, 2026	201-500	183 contacts →
	Exact match “Essex delivers transformative business solutions to major global corporations.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
23	LECG	Exact match	New York, United StatesHQ recorded Sep 30, 2026	1,001-5,000	181 contacts →
	Exact match “LECG is a global litigation; economics; consulting and business advisory; and governance, assurance, and tax expert services firm.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
24	Sharp Decisions	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	201-500	171 contacts →
	Exact match “For over 33 years, Sharp Decisions Inc.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
25	Sypartners	Exact match	New York, NY, United StatesHQ recorded Sep 30, 2026	51-200	170 contacts →
	Exact match “SYPartners is a transformation consultancy that helps leaders improve organizational performance by aligning vision, activating strategy, and building cultures of competitive…” 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 1,952 impact consulting firms based in New York, United States

See the full list, filter by size, metro and specialty, and access 46,419 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Impact consulting firms based in New York, United States at a glance

As of Sep 30, 2026

54.3%Verified-email coverage

43.8Average contacts per company

1-10Median size (employees)

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

1,412

11-50

383

51-200

104

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United States list rather than for New York, so it is reported there. Company counts and contact totals on this page are exact for New York, over 1,952 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 New York, 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 46,419 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 in the United States

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 New York, United States?

RevenueBase identified 1,952 company matches for impact consulting firms associated with New York, 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?

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

Which city in the United States has the most impact consulting firms?

New York leads the United States with 1,952 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 46,419 professional contacts with verified work emails tracked across these 1,952 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.

Ready to reach these companies? Verified emails and direct dials for all 1,952 impact consulting firms based in New York, United States. Start with a free account, no credit card.

Download this list →

Related lists

Impact consulting firms by geography

Browse the directory

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.