Company lists · Data refreshed November 2026

Top 25 Professional services consultancies worldwide

Name: Professional services consultancies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 112,394 companies tracked

RevenueBase identified 112,394 company matches for professional services consultancies worldwide as of November 2026 and tracks 3,288,214 professional contacts across them, including 1,072,814 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for professional services consultancies worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for professional services consultancies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

112,394Companies

3,288,214Contacts tracked

1,072,814Verified emails

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The 25 largest professional services consultancies worldwide

Ranked by team size

Top 25 of 112,394 company matches for professional services consultancies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Deloitte	Exact match	United StatesHQ recorded Nov 6, 2026	10001+	511,481 contacts →
	Exact match “Deloitte drives progress.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	EY	Exact match	London, United KingdomHQ recorded Nov 6, 2026	10001+	397,927 contacts →
	Exact match “EY is building a better working world by creating new value for clients, people, society, the planet, while building trust in the capital markets.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	PWC	Exact match	London, NY, United KingdomHQ recorded Nov 6, 2026	10001+	183,494 contacts →
	Exact match “At PwC, we help clients drive their companies to the leading edge.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	AECOM	Exact match	Dallas, TX, United StatesHQ recorded Nov 6, 2026	10001+	68,572 contacts →
	Exact match “AECOM is the global infrastructure leader, committed to delivering a better world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Mckinsey & Company	Exact match	n/a	10001+	52,155 contacts →
	Exact match “McKinsey & Company is a global management consulting firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Kpmg US	Exact match	New York, GA, United StatesHQ recorded Nov 6, 2026	10001+	47,430 contacts →
	Exact match “KPMG is one of the world’s leading professional services firms and the fastest growing Big Four accounting firm in the United States.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	EXL	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	10001+	46,962 contacts →
	Exact match “Choosing a digital partner is about more than capabilities, it’s about collaboration and character.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Boston Consulting Group BCG	Exact match	Boston, MA, United StatesHQ recorded Nov 6, 2026	10001+	35,975 contacts →
	Exact match “Boston Consulting Group partners with leaders in business and society to tackle their most important challenges and capture their greatest opportunities.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Kpmg India	Exact match	Gurgaon, IndiaHQ recorded Nov 6, 2026	10001+	30,313 contacts →
	Exact match “KPMG entities in India are established under the laws of India and are owned and managed (as the case may be) by established Indian professionals.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Bain & Company	Exact match	Boston, MA, United StatesHQ recorded Nov 6, 2026	10001+	23,264 contacts →
	Exact match “Bain & Company is a global consultancy that helps the world’s most ambitious change makers define the future.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Alvarez & Marsal	Exact match	New York, IL, United StatesHQ recorded Nov 6, 2026	10001+	14,637 contacts →
	Exact match “Alvarez & Marsal is a leading global professional services firm dedicated to helping organizations tackle their most complex business issues, maximize stakeholder value, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	BDO	Exact match	Brussels, BelgiumHQ recorded Nov 6, 2026	10001+	14,501 contacts →
	Exact match “BDO is the leading provider of professional services within the mid-tier of our profession.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Guidehouse	Exact match	Mclean, IL, United StatesHQ recorded Nov 6, 2026	10001+	13,603 contacts →
	Exact match “Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	PWC UK	Exact match	London, United KingdomHQ recorded Nov 6, 2026	10001+	11,496 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	BDO USA	Exact match	Chicago, AL, United StatesHQ recorded Nov 6, 2026	10001+	11,006 contacts →
	Exact match “At BDO, we believe how we show up matters.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Baker Tilly US	Exact match	Chicago, IL, United StatesHQ recorded Nov 6, 2026	10001+	10,838 contacts →
	Exact match “Every business is different-and the strongest decisions come from collaborating with a firm that understands how yours truly works.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Accenture Brasil	Exact match	São Paulo, BrazilHQ recorded Nov 6, 2026	10001+	10,564 contacts →
	Exact match “A Accenture é uma empresa líder global de serviços profissionais que ajuda grandes companhias, governos e outras organizações a construir sua essência digital, otimizar suas…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Slalom	Exact match	Seattle, BC, United StatesHQ recorded Nov 6, 2026	10001+	10,313 contacts →
	Exact match “Slalom is a fiercely human business and technology consulting company that leads with outcomes to bring more value, in all ways, always.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	WSP In The U.S	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	10001+	10,188 contacts →
	Exact match “What if you could shape built and natural environments – and the future of those that use them?” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	CLA Cliftonlarsonallen	Exact match	Othello, WA, United StatesHQ recorded Nov 6, 2026	5,001-10,000	9,936 contacts →
	Exact match “CLA exists to create opportunities for our clients, our people, and our communities through industry-focused wealth advisory, outsourcing, audit, tax, and consulting services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	FTI Consulting	Exact match	Washington, GA, United StatesHQ recorded Nov 6, 2026	5,001-10,000	9,494 contacts →
	Exact match “FTI Consulting is the leading global expert firm for organizations facing crisis and transformation, with more than 8,100 employees in 32 countries and territories.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Kpmg Australia	Exact match	Sydney, AustraliaHQ recorded Nov 6, 2026	5,001-10,000	9,151 contacts →
	Exact match “Welcome to KPMG.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Protiviti	Exact match	Menlo Park, United StatesHQ recorded Nov 6, 2026	5,001-10,000	9,086 contacts →
	Exact match “Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	MACE	Exact match	London, United KingdomHQ recorded Nov 6, 2026	5,001-10,000	8,941 contacts →
	Exact match “Mace Consult launched as a new and independent business on 5 March 2026, through a carve-out from Mace Group.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Oliver Wyman	Exact match	New York, NC, United StatesHQ recorded Nov 6, 2026	5,001-10,000	8,814 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “professional services consultancies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 112,394 professional services consultancies worldwide

See the full list, filter by size, metro and specialty, and access 1,072,814 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Professional services consultancies worldwide at a glance

As of Nov 6, 2026

32.6%Verified-email coverage

29.3Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

72,891

11-50

28,499

51-200

7,047

201-500

1,696

501-1,000

520

1,001-5,000

464

5,001-10,000

137

10001+

141

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for professional services consultancies are linked below.
What qualifies: Company records worldwide whose business descriptions match “professional services consultancies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,072,814 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Professional services consultancies by location

472 lists · largest first

Every Professional services consultancies 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 SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “professional services consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many professional services consultancies are there worldwide?

RevenueBase identified 112,394 company matches for professional services consultancies worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Deloitte tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most professional services consultancies?

The United States leads with 12,481 companies, followed by the United Kingdom (8,613) and India (7,435). Every professional services consultancies list by country and city is linked on this page.

Which city has the most professional services consultancies?

London leads with 2938 company records, followed by Sao Paulo (1685) and Paris (1350).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,072,814 professional contacts with verified work emails tracked across these 112,394 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.