Company lists · Data refreshed September 2026

Top 25 Big 5 consulting firms based in New York, United States

Name: Big 5 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 23, 2026 587 companies tracked

RevenueBase identified 587 big 5 consulting firms headquartered in New York, United States as of September 2026 and tracks 72,594 professional contacts across them, including 32,462 with verified work emails. Across the United States, New York is the largest hub for this category.

This list covers big 5 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 23, 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 23, 2026 86% judged on-target in blind review

587Companies

72,594Contacts tracked

32,462Verified emails

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The 25 largest big 5 consulting firms based in New York, United States

Ranked by team size

Top 25 of 587 big 5 consulting firms based in New York, United States, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to big 5 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 23, 2026	10001+	40,100 contacts →
	Indirect evidence “Choosing a digital partner is about more than capabilities, it’s about collaboration and character.” Source: RevenueBase Database · checked Sep 23, 2026
2	Alvarez & Marsal	Indirect evidence	New York, NY, United StatesHQ checked Sep 23, 2026	10001+	13,099 contacts →
	Indirect evidence “Alvarez & Marsal is a leading global professional services firm dedicated to helping organizations tackle their most complex business issues, maximize stakeholder value, and…” Source: RevenueBase Database · checked Sep 23, 2026
3	Oliver Wyman	Indirect evidence	New York, NY, United StatesHQ checked Sep 23, 2026	5,001-10,000	8,230 contacts →
	Indirect 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 23, 2026
4	Alixpartners	Indirect evidence	New York, NY, United StatesHQ checked Sep 23, 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 23, 2026
5	The Vertex Companies LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 23, 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 23, 2026
6	Seargin	Indirect evidence	New York, NY, United StatesHQ checked Sep 23, 2026	501-1,000	276 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 23, 2026
7	AON Inpoint	Indirect evidence	New York, NY, United StatesHQ checked Sep 23, 2026	10001+	252 contacts →
	Indirect evidence “Aon plc (NYSE:AON) is a leading global professional services firm providing a broad range of risk, retirement and health solutions.” Source: RevenueBase Database · checked Sep 23, 2026
8	Kraft & Kennedy, INC	Partial evidence	New York, NY, United StatesHQ checked Sep 23, 2026	51-200	219 contacts →
	Partial evidence “Kraft Kennedy is a multidisciplinary technology and management consulting firm.” Source: RevenueBase Database · checked Sep 23, 2026
9	Bryant Park Consulting	Indirect evidence	New York, NY, United StatesHQ checked Sep 23, 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 23, 2026
10	Essex Lake Group	Indirect evidence	New York, United StatesHQ checked Sep 23, 2026	201-500	183 contacts →
	Indirect evidence “Essex delivers transformative business solutions to major global corporations.” Source: RevenueBase Database · checked Sep 23, 2026
11	Sharp Decisions	Indirect evidence	New York, NY, United StatesHQ checked Sep 23, 2026	201-500	171 contacts →
	Indirect evidence “For over 33 years, Sharp Decisions Inc.” Source: RevenueBase Database · checked Sep 23, 2026
12	NEO Tangent Limited	Indirect evidence	New York, United StatesHQ checked Sep 23, 2026	1,001-5,000	167 contacts →
	Indirect evidence “We're a business process management organization that delivers professional services to our customers globally.” Source: RevenueBase Database · checked Sep 23, 2026
13	Cedar Management Consulting International	Partial evidence	New York, NY, United StatesHQ checked Sep 23, 2026	51-200	155 contacts →
	Partial evidence “Cedar is a global strategy consulting, research, & analytics firm with a 35-year track record & clients across multiple industry sectors.” Source: RevenueBase Database · checked Sep 23, 2026
14	Azeemi Technologies	Partial evidence	New York, United StatesHQ checked Sep 23, 2026	201-500	144 contacts →
	Partial evidence “Azeemi Technologies is leading global AI & IT Consulting company, established in 2003, providing end-to-end IT Services & Solutions in North America, Middle East, Africa and Asia.” Source: RevenueBase Database · checked Sep 23, 2026
15	Vertical Relevance	Partial evidence	New York, NY, United StatesHQ checked Sep 23, 2026	51-200	129 contacts →
	Partial evidence “Vertical Relevance is an industry-focused consulting firm with deep expertise in financial services and additional regulated industries.” Source: RevenueBase Database · checked Sep 23, 2026
16	Applied Value Group	Partial evidence	New York, NY, United StatesHQ checked Sep 23, 2026	51-200	124 contacts →
	Partial evidence “Founded in 1997 by Executive Chairman Bruce Grant and the late Jan Stenbeck, Applied Value Group is a leading global management consulting firm with decades of experience growing…” Source: RevenueBase Database · checked Sep 23, 2026
17	Tefen Management Consulting	Partial evidence	New York, NY, United StatesHQ checked Sep 23, 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 23, 2026
18	Universal Technology Solutions Uebiz	Indirect evidence	New York, NY, United StatesHQ checked Sep 23, 2026	51-200	118 contacts →
	Indirect evidence “We started as a small group of consultants dedicated to providing our clients with customized technology to meet their business needs.” Source: RevenueBase Database · checked Sep 23, 2026
19	Vivaldi	Indirect evidence	New York, NY, United StatesHQ checked Sep 23, 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 23, 2026
20	RE Partners	Partial evidence	New York, NY, United StatesHQ checked Sep 23, 2026	201-500	99 contacts →
	Partial evidence “RE Partners Consulting LLC was co-founded in 2019 by CEO Valerie Kogan and CRO Alex Gikher, and our custom-tailored, high-touch, white-glove engineering service is a result of 50+…” Source: RevenueBase Database · checked Sep 23, 2026
21	MESA	Indirect evidence	New York, NY, United StatesHQ checked Sep 23, 2026	11-50	90 contacts →
	Indirect evidence “A radically efficient approach to work.” Source: RevenueBase Database · checked Sep 23, 2026
22	Activate Consulting	Partial evidence	New York, NY, United StatesHQ checked Sep 23, 2026	51-200	85 contacts →
	Partial evidence “Activate is a smart, fast, and nimble next generation strategy and technology consulting firm.” Source: RevenueBase Database · checked Sep 23, 2026
23	Alton Aviation Consultancy	Partial evidence	New York, NY, United StatesHQ checked Sep 23, 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 23, 2026
24	Reference Point	Partial evidence	New York, NY, United StatesHQ checked Sep 23, 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 23, 2026
25	Nazdaqtechnologies INC	Partial evidence	New York, NY, United StatesHQ checked Sep 23, 2026	11-50	75 contacts →
	Partial evidence “Headquartered in New York, nazdaqTechnologies Inc, is a specialist technology consulting firm that provides advanced & robust solutions to large multinational corporations, Small…” Source: RevenueBase Database · checked Sep 23, 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: big 5 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 big 5 consulting firms.
Partial evidence: Its own public description names part of big 5 consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name big 5 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 587 big 5 consulting firms based in New York, United States

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Big 5 consulting firms based in New York, United States at a glance

As of Sep 23, 2026

44.7%Verified-email coverage

123.7Average contacts per company

1-10Median size (employees)

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

335

11-50

148

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 587 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 big 5 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 “big 5 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 big 5 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 big 5 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, 32,462 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 23, 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.

Big 5 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 big 5 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 big 5 consulting firms are there based in New York, United States?

RevenueBase identified 587 big 5 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?

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

Which city in the United States has the most big 5 consulting firms?

New York leads the United States with 587 headquartered companies, followed by Chicago (350) and Atlanta (336).

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 32,462 verified decision-maker contacts tracked across these 587 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 23, 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.