Company lists · Data refreshed September 2026

Top 25 Consultancy companies worldwide

Name: Consultancy companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 145,418 companies tracked

RevenueBase identified 145,418 consultancy companies worldwide as of September 2026 and tracks 1,312,676 professional contacts across them, including 400,193 with verified work emails and 126,604 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers consultancy companies worldwide, 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. Country and city lists for consultancy companies follow the table.

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

145,418Companies

1,312,676Contacts tracked

400,193Verified emails

126,604Mobile numbers

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The 25 largest consultancy companies worldwide

Ranked by team size

Top 25 of 145,418 consultancy companies worldwide, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to consultancy companies: 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	Boston Consulting Group BCG	Indirect evidence	Boston, MA, United StatesHQ checked Sep 24, 2026	10001+	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 24, 2026
2	Autonomo	Indirect evidence	Córdoba, SpainHQ checked Sep 24, 2026	n/a	23,018 contacts →
	Indirect evidence “Calidad y Gestión es una empresa consultora de ámbito internacional especializada en servicios de asesoría en las siguientes áreas: Calidad Medio Ambiente Responsabilidad social…” Source: RevenueBase Database · checked Sep 24, 2026
3	Bain & Company	Strong evidence	Boston, MA, United StatesHQ checked Sep 24, 2026	10001+	21,689 contacts →
	Strong evidence “Bain & Company is a global consultancy that helps the world’s most ambitious change makers define the future.” Source: RevenueBase Database · checked Sep 24, 2026
4	Alvarez & Marsal	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 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 24, 2026
5	Protiviti	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 24, 2026	5,001-10,000	8,779 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 24, 2026
6	MACE	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	5,001-10,000	8,458 contacts →
	Indirect evidence “Mace Consult launched as a new and independent business on 5 March 2026, through a carve-out from Mace Group.” Source: RevenueBase Database · checked Sep 24, 2026
7	Bearingpoint	Strong evidence	Amsterdam, NetherlandsHQ checked Sep 24, 2026	5,001-10,000	8,106 contacts →
	Strong evidence “BearingPoint is an independent management and technology consultancy.” Source: RevenueBase Database · checked Sep 24, 2026
8	Kearney	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 24, 2026	5,001-10,000	6,978 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 24, 2026
9	Wavestone	Indirect evidence	100-101 Terrasse Boieldieu, FranceHQ checked Sep 24, 2026	1,001-5,000	6,190 contacts →
	Indirect evidence “Wavestone is a leading consulting firm operating at the intersection of business and technology.” Source: RevenueBase Database · checked Sep 24, 2026
10	Accenture Strategy & Consulting	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 24, 2026	5,001-10,000	5,514 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 24, 2026
11	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
12	Groupe SII	Indirect evidence	Paris, FranceHQ checked Sep 24, 2026	10001+	4,928 contacts →
	Indirect evidence “Le groupe SII est une société d’ingénierie et de conseil en technologies (ICT) et une entreprise de services numériques (ESN) créée en 1979 par Bernard HUVÉ, ingénieur de…” Source: RevenueBase Database · checked Sep 24, 2026
13	Bank Of The West	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 24, 2026	n/a	4,751 contacts →
	Indirect evidence “We help businesses and nonprofits grow, communicate, and succeed, professionally and affordably.” Source: RevenueBase Database · checked Sep 24, 2026
14	BIP	Indirect evidence	Milano, ItalyHQ checked Sep 24, 2026	5,001-10,000	4,548 contacts →
	Indirect evidence “A network of thinkers, creatives and creators.” Source: RevenueBase Database · checked Sep 24, 2026
15	Management Solutions	Indirect evidence	Madrid, SpainHQ checked Sep 24, 2026	1,001-5,000	4,468 contacts →
	Indirect evidence “Management Solutions is a leading provider of business consulting services for regulated industries.” Source: RevenueBase Database · checked Sep 24, 2026
16	L.E.K. Consulting	Indirect evidence	Boston, MA, United StatesHQ checked Sep 24, 2026	1,001-5,000	4,093 contacts →
	Indirect evidence “L.E.K.” Source: RevenueBase Database · checked Sep 24, 2026
17	DAI	Indirect evidence	Bethesda, MD, United StatesHQ checked Sep 24, 2026	5,001-10,000	3,741 contacts →
	Indirect evidence “DAI is an integrated professional services and advisory firm that provides project design and delivery, management consulting, and financial services to companies, investors, and…” Source: RevenueBase Database · checked Sep 24, 2026
18	Accenture Dach	Indirect evidence	Kronberg Im Taunus, GermanyHQ checked Sep 24, 2026	10001+	3,644 contacts →
	Indirect evidence “Über Accenture: Wir sind die weltweit führenden Berater für Strategie, Management, Digitalisierung, Technologie, Outsourcing und Business Transformation.” Source: RevenueBase Database · checked Sep 24, 2026
19	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
20	Norconsult	Strong evidence	Sandvika, NorwayHQ checked Sep 24, 2026	5,001-10,000	3,555 contacts →
	Strong evidence “Norconsult is a multidisciplinary engineering and design consultancy, providing services to clients in the public and private sectors worldwide.” Source: RevenueBase Database · checked Sep 24, 2026
21	Buro Happold	Strong evidence	Bath, United KingdomHQ checked Sep 24, 2026	1,001-5,000	3,336 contacts →
	Strong evidence “We are an international, integrated consultancy of engineers, designers and advisers.” Source: RevenueBase Database · checked Sep 24, 2026
22	Knowit	Indirect evidence	Stockholm, SwedenHQ checked Sep 24, 2026	1,001-5,000	3,317 contacts →
	Indirect evidence “Currently, we are more than 3,700 employees mainly in the Nordic countries, but also in operations in Germany and Poland, working with clients and partners to develop innovative…” Source: RevenueBase Database · checked Sep 24, 2026
23	Rider Levett Bucknall RLB	Indirect evidence	Sydney, United KingdomHQ checked Sep 24, 2026	1,001-5,000	3,299 contacts →
	Indirect evidence “RLB.” Source: RevenueBase Database · checked Sep 24, 2026
24	In Extenso	Indirect evidence	Lyon, FranceHQ checked Sep 24, 2026	5,001-10,000	3,278 contacts →
	Indirect evidence “Crée en 1991 In Extenso est l’un des leaders de l’expertise comptable en France.” Source: RevenueBase Database · checked Sep 24, 2026
25	Migso-Pcubed	Strong evidence	Toulouse, FranceHQ checked Sep 24, 2026	1,001-5,000	3,130 contacts →
	Strong evidence “MIGSO-PCUBED is the world’s leading consultancy dedicated to project, programme, portfolio and change management.” 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: consultancy companies. 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 consultancy companies.
Partial evidence: Its own public description names part of consultancy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name consultancy companies. 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 145,418 consultancy companies worldwide

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Consultancy companies worldwide at a glance

As of Sep 24, 2026

30.5%Verified-email coverage

9.6%Mobile-number coverage

9.0Average contacts per company

1-10Median size (employees)

4.5%Largest-city concentration · London

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

110,783

11-50

25,921

51-200

5,273

201-500

1,064

501-1,000

370

1,001-5,000

281

5,001-10,000

10001+

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 consultancy companies, 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.
Coverage: 46 countries, largest first: the United States, the United Kingdom, Brazil, France, Germany, Italy, Australia, Spain, the Netherlands, Canada and 36 more. Country and city lists for consultancy companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “consultancy companies”. 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 consultancy companies), 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 consultancy companies, and records with no verified work email.
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, 400,193 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.

Consultancy companies by location

521 lists · largest first

Every Consultancy companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 consultancy companies, 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 consultancy companies are there worldwide?

RevenueBase identified 145,418 consultancy companies worldwide 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?

Boston Consulting Group BCG, headquartered in Boston, tops this list with the largest team on record.

Which country has the most consultancy companies?

The United States leads with 28,091 companies, followed by the United Kingdom (21,348) and Brazil (13,620). Every consultancy companies list by country and city is linked on this page.

Which city has the most consultancy companies?

London leads with 6479 headquartered companies, followed by Sao Paulo (3453) and Paris (2942).

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 400,193 verified decision-maker contacts tracked across these 145,418 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.