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Company lists · Data refreshed September 2026

Top 25 B2B consultancy services based in the United States

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 33,396 companies tracked

RevenueBase identified 33,396 B2B consultancy services headquartered in the United States as of September 2026 and tracks 569,914 professional contacts across them, including 208,605 with verified work emails and 158,631 with mobile numbers. New York is the largest hub.

This list covers B2B consultancy services headquartered in the 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
33,396Companies
569,914Contacts tracked
208,605Verified emails
158,631Mobile numbers
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The 25 largest B2B consultancy services based in the United States

Ranked by team size
Top 25 of 33,396 B2B consultancy services based in the United States, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to B2B consultancy services: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1
EXL
Indirect evidenceNew York, NY, United StatesHQ checked Sep 23, 202610001+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
Boston Consulting Group BCG
Indirect evidenceBoston, MA, United StatesHQ checked Sep 23, 202610001+38,730 contacts →

Indirect evidence

“Boston Consulting Group partners with leaders in business and society to tackle their most important challenges and capture their greatest opportunities.”

Source: RevenueBase Database · checked Sep 23, 2026
3
Teksystems
Indirect evidenceHanover, MD, United StatesHQ checked Sep 23, 202610001+24,693 contacts →

Indirect evidence

“We’re TEKsystems and TEKsystems Global Services.”

Source: RevenueBase Database · checked Sep 23, 2026
4
NTT Data North America
Indirect evidencePlano, TX, United StatesHQ checked Sep 23, 202610001+22,390 contacts →

Indirect evidence

“NTT DATA, Inc.”

Source: RevenueBase Database · checked Sep 23, 2026
5
Bain & Company
Partial evidenceBoston, MA, United StatesHQ checked Sep 23, 202610001+21,689 contacts →

Partial evidence

“Bain & Company is a global consultancy that helps the world’s most ambitious change makers define the future.”

Source: RevenueBase Database · checked Sep 23, 2026
6
ZS
Indirect evidenceEvanston, IL, United StatesHQ checked Sep 23, 202610001+16,896 contacts →

Indirect evidence

“ZS is a management consulting and technology firm that partners with companies to improve life and how we live it.”

Source: RevenueBase Database · checked Sep 23, 2026
7
CDW
Indirect evidenceVernon Hills, IL, United StatesHQ checked Sep 23, 202610001+13,155 contacts →

Indirect evidence

“At CDW, we know how to make technology work so people can do great things.”

Source: RevenueBase Database · checked Sep 23, 2026
8
Alvarez & Marsal
Indirect evidenceNew York, NY, United StatesHQ checked Sep 23, 202610001+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
9
Slalom
Indirect evidenceSeattle, WA, United StatesHQ checked Sep 23, 202610001+10,032 contacts →

Indirect evidence

“Slalom is a fiercely human business and technology consulting company that leads with outcomes to bring more value, in all ways, always.”

Source: RevenueBase Database · checked Sep 23, 2026
10
World Wide Technology
Indirect evidenceMaryland Heights, MO, United StatesHQ checked Sep 23, 202610001+9,184 contacts →

Indirect evidence

“We are thinkers and doers.”

Source: RevenueBase Database · checked Sep 23, 2026
11
Protiviti
Indirect evidenceMenlo Park, CA, United StatesHQ checked Sep 23, 20265,001-10,0008,779 contacts →

Indirect evidence

“Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…”

Source: RevenueBase Database · checked Sep 23, 2026
12
Yash Technologies
Indirect evidenceEast Moline, IL, United StatesHQ checked Sep 23, 20265,001-10,0007,769 contacts →

Indirect evidence

“YASH Technologies is a consulting-led transformation partner with a proven track record of helping customers address their current and prospective digital transformation…”

Source: RevenueBase Database · checked Sep 23, 2026
13
HURON
Indirect evidenceChicago, IL, United StatesHQ checked Sep 23, 20265,001-10,0007,520 contacts →

Indirect evidence

“Huron is a global professional services firm that collaborates with organizations to solve complex challenges and achieve ambitious goals.”

Source: RevenueBase Database · checked Sep 23, 2026
14
Kearney
Indirect evidenceChicago, IL, United StatesHQ checked Sep 23, 20265,001-10,0006,978 contacts →

Indirect evidence

“As one of the original firms, we’ve never lost sight of the fact that consulting is a people business.”

Source: RevenueBase Database · checked Sep 23, 2026
15
Accenture Strategy & Consulting
Indirect evidenceChicago, IL, United StatesHQ checked Sep 23, 20265,001-10,0005,514 contacts →

Indirect evidence

“Accenture Strategy combines deep industry expertise, advanced analytics capabilities and human-led design methodologies that enable clients to act with speed and confidence.”

Source: RevenueBase Database · checked Sep 23, 2026
16
Strategy
Indirect evidenceNew York, NY, United StatesHQ checked Sep 23, 20261,001-5,0005,082 contacts →

Indirect evidence

“From strategy to execution.”

Source: RevenueBase Database · checked Sep 23, 2026
17
L.E.K. Consulting
Indirect evidenceBoston, MA, United StatesHQ checked Sep 23, 20261,001-5,0004,093 contacts →

Indirect evidence

“L.E.K.”

Source: RevenueBase Database · checked Sep 23, 2026
18
Alixpartners
Indirect evidenceNew York, NY, United StatesHQ checked Sep 23, 20261,001-5,0003,583 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
19
Withum
Indirect evidencePrinceton, NJ, United StatesHQ checked Sep 23, 20261,001-5,0003,326 contacts →

Indirect evidence

“Withum is a forward-thinking, technology-driven advisory and accounting firm, helping clients to Be in a Position of Strength in today’s modern business landscape.”

Source: RevenueBase Database · checked Sep 23, 2026
20
ETEAM
Indirect evidenceSomerset, NJ, United StatesHQ checked Sep 23, 2026n/a3,285 contacts →

Indirect evidence

“For over 25 years, eTeam has been trusted by global organizations to lead high-stakes programs where execution matters as much as strategy.”

Source: RevenueBase Database · checked Sep 23, 2026
21
Wipfli
Indirect evidenceMilwaukee, WI, United StatesHQ checked Sep 23, 20261,001-5,0003,047 contacts →

Indirect evidence

“Always advancing.”

Source: RevenueBase Database · checked Sep 23, 2026
22
Armanino
Indirect evidenceSan Ramon, CA, United StatesHQ checked Sep 23, 20261,001-5,0002,989 contacts →

Indirect evidence

“Founded as an alternative to the status quo, Armanino doesn’t just keep up with change, we embrace it.”

Source: RevenueBase Database · checked Sep 23, 2026
23
VEE Technologies
Indirect evidenceDecatur, GA, United StatesHQ checked Sep 23, 20265,001-10,0002,933 contacts →

Indirect evidence

“Vee Technologies is a global consulting and professional services organization delivering specialized, technology-enabled solutions.”

Source: RevenueBase Database · checked Sep 23, 2026
24
Speridian Technologies
Indirect evidenceAlbuquerque, NM, United StatesHQ checked Sep 23, 20261,001-5,0002,619 contacts →

Indirect evidence

“Speridian Technologies is a global consulting and technology services firm that helps enterprises and public sector organizations modernize operations, enhance customer experience…”

Source: RevenueBase Database · checked Sep 23, 2026
25
Frost & Sullivan
Indirect evidenceSan Antonio, TX, United StatesHQ checked Sep 23, 20261,001-5,0002,330 contacts →

Indirect evidence

“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.”

Source: RevenueBase Database · checked Sep 23, 2026

Showing 25 of 33,396 B2B consultancy services based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 208,605 reachable decision-makers.

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B2B consultancy services based in the United States at a glance

As of Sep 23, 2026
36.6%Verified-email coverage
27.8%Mobile-number coverage
17.1Average contacts per company
1-10Median size (employees)
4.3%Largest-city concentration · New York
Sep 23, 2026Page data refreshed

Companies by employee count

1-10
24,750
11-50
5,971
51-200
1,907
201-500
437
501-1,000
145
1,001-5,000
102
5,001-10,000
24
10001+
35

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 26.0d

Company record updated

Median 75.0d

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 B2B consultancy services, 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 the United States whose own description of what they do matches “B2B consultancy services”. 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 B2B consultancy services), 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 B2B consultancy services, and records with no verified work email. Companies headquartered outside United States 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, 208,605 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.

B2B consultancy services by metro

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 B2B consultancy services, 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 B2B consultancy services are there based in the United States?

RevenueBase identified 33,396 B2B consultancy services headquartered in the 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 has the most B2B consultancy services?

New York leads with 1433 headquartered companies, followed by Atlanta (817) and Chicago (792).

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 208,605 verified decision-maker contacts tracked across these 33,396 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.

Ready to reach these companies? Verified emails and direct dials for all 33,396 B2B consultancy services based in the United States. Start with a free account, no credit card.

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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.

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