Company lists · Data refreshed September 2026

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

Name: 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 24, 2026 1,403 companies tracked

RevenueBase identified 1,403 development consulting firms headquartered in New York, United States as of September 2026 and tracks 30,836 professional contacts across them, including 14,910 with verified work emails. New York is the largest hub.

This list covers 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 24, 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 24, 2026 86% judged on-target in blind review

1,403Companies

30,836Contacts tracked

14,910Verified emails

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

Ranked by team size

Top 25 of 1,403 development consulting firms based in New York, United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to 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	WSP In The U.S	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	10001+	9,318 contacts →
	Indirect evidence “What if you could shape built and natural environments – and the future of those that use them?” Source: RevenueBase Database · checked Sep 24, 2026
2	Strategy	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	1,001-5,000	5,082 contacts →
	Indirect evidence “From strategy to execution.” Source: RevenueBase Database · checked Sep 24, 2026
3	Alixpartners	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 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 24, 2026
4	Cumming Group	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,612 contacts →
	Indirect evidence “At Cumming Group, we are passionate about helping our clients execute large-scale, complex projects on time and within budget.” Source: RevenueBase Database · checked Sep 24, 2026
5	The Vertex Companies LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 24, 2026	501-1,000	765 contacts →
	Partial 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 24, 2026
6	CCS Fundraising	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	501-1,000	728 contacts →
	Indirect 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 24, 2026
7	Keystone	Partial evidence	New York, NY, United StatesHQ checked Sep 24, 2026	201-500	423 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 24, 2026
8	Industri	Partial evidence	New York, NY, United StatesHQ checked Sep 24, 2026	n/a	292 contacts →
	Partial 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 24, 2026
9	TCC Group	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	n/a	232 contacts →
	Indirect evidence “TCC Group collaborates with leaders to solve complex social problems.” Source: RevenueBase Database · checked Sep 24, 2026
10	Hr&a Advisors	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	51-200	213 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 24, 2026
11	Horwath HTL	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	201-500	198 contacts →
	Indirect evidence “Bold steps forward.” Source: RevenueBase Database · checked Sep 24, 2026
12	Research Nester Analytics	Partial evidence	New York, NY, United StatesHQ checked Sep 24, 2026	51-200	191 contacts →
	Partial evidence “Research Nester is a global consulting firm that works with the most aspirational facilitators to define the future market strategies.” Source: RevenueBase Database · checked Sep 24, 2026
13	Essex Lake Group	Indirect evidence	New York, United StatesHQ checked Sep 24, 2026	201-500	183 contacts →
	Indirect evidence “Essex delivers transformative business solutions to major global corporations.” Source: RevenueBase Database · checked Sep 24, 2026
14	ITAC	Partial evidence	New York, NY, United StatesHQ checked Sep 24, 2026	n/a	150 contacts →
	Partial evidence “ITAC is a leading consulting organization located in New York City.” Source: RevenueBase Database · checked Sep 24, 2026
15	VVA	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	51-200	146 contacts →
	Indirect evidence “At VVA, we become an integral part of your team, serving as trusted advisors who are deeply invested in your success.” Source: RevenueBase Database · checked Sep 24, 2026
16	Tefen Management Consulting	Partial evidence	New York, NY, United StatesHQ checked Sep 24, 2026	201-500	122 contacts →
	Partial evidence “Tefen is an international management consulting firm, committed to driving organizations towards achieving performance excellence.” Source: RevenueBase Database · checked Sep 24, 2026
17	DBOX	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	51-200	94 contacts →
	Indirect evidence “DBOX is shaped to be where our global clients are, combining our global expertise and capabilities with specialist local knowledge and insight.” Source: RevenueBase Database · checked Sep 24, 2026
18	MESA	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	11-50	90 contacts →
	Indirect evidence “A radically efficient approach to work.” Source: RevenueBase Database · checked Sep 24, 2026
19	Next Street	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 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 24, 2026
20	Alton Aviation Consultancy	Partial evidence	New York, NY, United StatesHQ checked Sep 24, 2026	51-200	85 contacts →
	Partial evidence “Alton Aviation Consultancy has significant experience delivering large, complex consulting engagements for clients in aviation and aerospace.” Source: RevenueBase Database · checked Sep 24, 2026
21	Reference Point	Partial evidence	New York, NY, United StatesHQ checked Sep 24, 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 24, 2026
22	Bloomberg Associates	Partial evidence	New York, NY, United StatesHQ checked Sep 24, 2026	11-50	67 contacts →
	Partial evidence “Bloomberg Associates is an international consulting service founded by Michael R.” Source: RevenueBase Database · checked Sep 24, 2026
23	Lehrer Cumming	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	51-200	64 contacts →
	Indirect evidence “Lehrer Cumming is an industry-leading project and cost management and hands-on owner advisory firm that offers strategic guidance to owners, developers, and institutions in and…” Source: RevenueBase Database · checked Sep 24, 2026
24	Graham-Pelton	Partial evidence	New York, NY, United StatesHQ checked Sep 24, 2026	51-200	59 contacts →
	Partial evidence “Graham-Pelton is the fundraising consulting firm chosen by leading nonprofits worldwide.” Source: RevenueBase Database · checked Sep 24, 2026
25	MOJO	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	51-200	56 contacts →
	Indirect evidence “We are a creative consultancy.” Source: RevenueBase Database · checked Sep 24, 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: 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 development consulting firms.
Partial evidence: Its own public description names part of 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 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 1,403 development consulting firms based in New York, United States

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

As of Sep 24, 2026

48.4%Verified-email coverage

22.0Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · New York

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

1,034

11-50

282

51-200

201-500

501-1,000

1,001-5,000

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 1,403 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 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 “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 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 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, 14,910 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 24, 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.

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

RevenueBase identified 1,403 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?

WSP In The U.S, headquartered in New York, tops this list with the largest team on record.

Which city has the most development consulting firms?

New York leads with 1403 headquartered companies, followed by Washington (758) and Chicago (749).

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 14,910 verified decision-maker contacts tracked across these 1,403 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 24, 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.