Company lists · Data refreshed September 2026

Top 25 Organizational development consulting firms based in New York, United States

Name: Organizational development 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 5, 2026 2,030 companies tracked

RevenueBase identified 2,030 organizational development consulting firms headquartered in New York, United States as of September 2026 and tracks 33,638 professional contacts across them, including 16,053 with verified work emails. Across the United States, New York is the largest hub for this category.

This list covers organizational development consulting firms headquartered in New York, 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 5, 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 5, 2026 86% judged on-target in blind review

2,030Companies

33,638Contacts tracked

16,053Verified emails

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

Ranked by team size

Top 25 of 2,030 organizational development consulting firms based in New York, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to organizational development 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	Oliver Wyman	Partial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	5,001-10,000	8,230 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 5, 2026
2	Strategy	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	5,082 contacts →
	Indirect evidence “From strategy to execution.” Source: RevenueBase Database · checked Sep 5, 2026
3	Alixpartners	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	3,583 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 5, 2026
4	SEGAL	Partial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,149 contacts →
	Partial evidence “Segal is a leading employee-owned consulting firm with more than 1,100 professionals across North America, including 150+ credentialed actuaries.” Source: RevenueBase Database · checked Sep 5, 2026
5	The Vertex Companies LLC	Strong evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	765 contacts →
	Strong evidence “The Vertex Companies, LLC is a global consulting firm that provides strategic advisory, project management, and dispute resolution services for organizations that face complex…” Source: RevenueBase Database · checked Sep 5, 2026
6	CCS Fundraising	Partial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	728 contacts →
	Partial evidence “For over 75 years, CCS Fundraising has empowered many of the world’s greatest organizations to advance some of the most important causes in history.” Source: RevenueBase Database · checked Sep 5, 2026
7	Phronesis Partners	Partial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	201-500	337 contacts →
	Partial evidence “At Phronesis Partners, we turn complexity into clarity for the world's leading organizations.” Source: RevenueBase Database · checked Sep 5, 2026
8	Industri	Strong evidence	New York, NY, United StatesHQ checked Sep 5, 2026	n/a	292 contacts →
	Strong evidence “Construction Sector/B2B Brand Strategy, Marketing & Business Development INDUSTRI® is a multi-faceted business development consultancy that focuses on key areas of an organization…” Source: RevenueBase Database · checked Sep 5, 2026
9	TCC Group	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	n/a	232 contacts →
	Indirect evidence “TCC Group collaborates with leaders to solve complex social problems.” Source: RevenueBase Database · checked Sep 5, 2026
10	Bryant Park Consulting	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	201-500	191 contacts →
	Indirect evidence “We champion a culture of innovation to help our clients build the future of business.” Source: RevenueBase Database · checked Sep 5, 2026
11	Essex Lake Group	Indirect evidence	New York, United StatesHQ checked Sep 5, 2026	201-500	183 contacts →
	Indirect evidence “Essex delivers transformative business solutions to major global corporations.” Source: RevenueBase Database · checked Sep 5, 2026
12	IVY	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	n/a	171 contacts →
	Indirect evidence “IVY is a coaching and learning partner for impact-focused CEOs and business leaders.” Source: RevenueBase Database · checked Sep 5, 2026
13	Sypartners	Partial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	170 contacts →
	Partial evidence “SYPartners is a transformation consultancy that helps leaders improve organizational performance by aligning vision, activating strategy, and building cultures of competitive…” Source: RevenueBase Database · checked Sep 5, 2026
14	Collins	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	164 contacts →
	Indirect evidence “COLLINS is a transformation consultancy with offices in San Francisco and New York City.” Source: RevenueBase Database · checked Sep 5, 2026
15	Acquis Consulting Group	Partial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	150 contacts →
	Partial evidence “Acquis is a different kind of management consulting firm.” Source: RevenueBase Database · checked Sep 5, 2026
16	ITAC	Strong evidence	New York, NY, United StatesHQ checked Sep 5, 2026	n/a	150 contacts →
	Strong evidence “ITAC is a leading consulting organization located in New York City.” Source: RevenueBase Database · checked Sep 5, 2026
17	Tefen Management Consulting	Strong evidence	New York, NY, United StatesHQ checked Sep 5, 2026	201-500	122 contacts →
	Strong evidence “Tefen is an international management consulting firm, committed to driving organizations towards achieving performance excellence.” Source: RevenueBase Database · checked Sep 5, 2026
18	August Leadership	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	201-500	116 contacts →
	Indirect evidence “We solve talent leadership challenges.” Source: RevenueBase Database · checked Sep 5, 2026
19	Wert&co	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	n/a	105 contacts →
	Indirect evidence “Wert & Co.” Source: RevenueBase Database · checked Sep 5, 2026
20	Vivaldi	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	102 contacts →
	Indirect evidence “Vivaldi is a global business reinvention firm comprised of growth strategists, innovators, visionary technologists, and disruptive creatives.” Source: RevenueBase Database · checked Sep 5, 2026
21	MKDA	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	93 contacts →
	Indirect evidence “MKDA is a corporate planning and interior design firm with vibrant studios in New York, Stamford and Miami.” Source: RevenueBase Database · checked Sep 5, 2026
22	MESA	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	11-50	90 contacts →
	Indirect evidence “A radically efficient approach to work.” Source: RevenueBase Database · checked Sep 5, 2026
23	Next Street	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	85 contacts →
	Indirect evidence “For more than 20 years, corporations, governments, and philanthropies have hired Next Street to strengthen the small businesses they rely on.” Source: RevenueBase Database · checked Sep 5, 2026
24	Reference Point	Partial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	83 contacts →
	Partial evidence “Reference Point is a strategy, management, and technology consulting firm focused on delivering impactful solutions for the financial services industry.” Source: RevenueBase Database · checked Sep 5, 2026
25	CCA Inc.	Partial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	77 contacts →
	Partial evidence “CCA helps clients improve organizational and individual performance.” Source: RevenueBase Database · checked Sep 5, 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: organizational development 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 organizational development consulting firms.
Partial evidence: Its own public description names part of organizational development consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name organizational development 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 2,030 organizational development consulting firms based in New York, United States

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

As of Sep 5, 2026

47.7%Verified-email coverage

16.6Average contacts per company

1-10Median size (employees)

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

1,598

11-50

325

51-200

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 2,030 companies.

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 organizational development 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 New York, United States whose own description of what they do matches “organizational development 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 organizational development 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 organizational development consulting firms, and records with no verified work email. Companies headquartered outside New York 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, 16,053 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 5, 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.

Organizational development consulting firms by metro in the United States

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 organizational development 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 organizational development consulting firms are there based in New York, United States?

RevenueBase identified 2,030 organizational development consulting firms headquartered in New York, 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?

Oliver Wyman, headquartered in New York, tops this list with the largest team on record.

Which city in the United States has the most organizational development consulting firms?

New York leads the United States with 2,030 headquartered companies, followed by Chicago (1,259) and Atlanta (1,253).

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 16,053 verified decision-maker contacts tracked across these 2,030 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 5, 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.