Company lists · Data refreshed September 2026

Top 25 Professional service firms worldwide

Name: Professional service firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 19,227 companies tracked

RevenueBase identified 19,227 company matches for professional service firms worldwide as of September 2026 and tracks 915,257 professional contacts across them, including 326,253 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for professional service firms 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 September 20, 2026. Country and city lists for professional service firms 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 Sep 20, 2026 How this list was built

19,227Companies

915,257Contacts tracked

326,253Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest professional service firms worldwide

Ranked by team size

Top 25 of 19,227 company matches for professional service firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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 Sep 20, 2026	10001+	480,083 contacts →
	Exact match “Deloitte drives progress.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2	Kpmg India	Exact match	Gurugram, IndiaHQ recorded Sep 20, 2026	10001+	28,997 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 · Sep 20, 2026 · View company records in RevenueBase
3	Kpmg Australia	Exact match	Sydney, AustraliaHQ recorded Sep 20, 2026	5,001-10,000	9,024 contacts →
	Exact match “Welcome to KPMG.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4	Kpmg Deutschland	Exact match	Berlin, GermanyHQ recorded Sep 20, 2026	10001+	8,886 contacts →
	Exact match “KPMG is a network of professional firms with about employees in 146 countries and territories.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5	Protiviti	Exact match	Menlo Park, CA, United StatesHQ recorded Sep 20, 2026	5,001-10,000	8,779 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 · Sep 20, 2026 · View company records in RevenueBase
6	CBIZ	Exact match	Independence, OH, United StatesHQ recorded Sep 20, 2026	10001+	6,369 contacts →
	Exact match “CBIZ, Inc.(NYSE: CBZ) is a leading professional services advisor to middle-market businesses nationwide.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7	Management Solutions	Exact match	Madrid, SpainHQ recorded Sep 20, 2026	1,001-5,000	4,468 contacts →
	Exact match “Management Solutions is a leading provider of business consulting services for regulated industries.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8	Eisneramper	Exact match	New York, NY, United StatesHQ recorded Sep 20, 2026	1,001-5,000	4,199 contacts →
	Exact match “EisnerAmper, one of the largest business consulting firms in the world, is comprised of EisnerAmper LLP, a licensed independent CPA firm that provides client attest services; and…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9	PWC Luxembourg	Exact match	LuxembourgHQ recorded Sep 20, 2026	1,001-5,000	3,413 contacts →
	Exact match “PwC Luxembourg is the largest professional services firm in Luxembourg with over 3,600 people employed from 90 different countries.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10	In Extenso	Exact match	Lyon, FranceHQ recorded Sep 20, 2026	5,001-10,000	3,278 contacts →
	Exact match “Crée en 1991 In Extenso est l’un des leaders de l’expertise comptable en France.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11	BDO Rise	Exact match	Bengaluru, IndiaHQ recorded Sep 20, 2026	1,001-5,000	3,231 contacts →
	Exact match “BDO RISE stands for round-the-clock international services for excellence and is dedicated to providing exceptional client service in the global economy to BDO USA.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12	Wipfli	Exact match	Milwaukee, WI, United StatesHQ recorded Sep 20, 2026	1,001-5,000	3,047 contacts →
	Exact match “Always advancing.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13	Citrin Cooperman	Exact match	New York, United StatesHQ recorded Sep 20, 2026	1,001-5,000	2,996 contacts →
	Exact match “Citrin Cooperman is one of the nation’s largest and fastest-growing professional services firms.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14	Kpmg Ireland	Exact match	Dublin 2, IrelandHQ recorded Sep 20, 2026	1,001-5,000	2,952 contacts →
	Exact match “KPMG is a leading provider of professional services, offering a range of audit, tax and advisory services to a broad range of domestic and international clients across all sectors…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15	PWC Malaysia	Exact match	Kuala Lumpur, MalaysiaHQ recorded Sep 20, 2026	1,001-5,000	2,858 contacts →
	Exact match “At PwC, we measure success by having a positive reputation.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16	BDO In Australia	Exact match	Bdo, IndonesiaHQ recorded Sep 20, 2026	1,001-5,000	2,528 contacts →
	Exact match “BDO is a trusted adviser to clients seeking audit, tax and advisory services.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17	Grant Thornton Ireland	Exact match	Dublin, IrelandHQ recorded Sep 20, 2026	1,001-5,000	2,374 contacts →
	Exact match “In Ireland, Grant Thornton Ireland and Grant Thornton Corporate Finance Limited (and their respective subsidiary/affiliate entities) operate under an alternative practice…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18	Carr, Riggs & Ingram	Exact match	Enterprise, AL, United StatesHQ recorded Sep 20, 2026	1,001-5,000	2,102 contacts →
	Exact match “Carr, Riggs & Ingram (CRI) is a Top 25 nationally-ranked accounting and advisory firm driven by relationships to cultivate growth.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19	Uhy-Us	Exact match	New York, NY, United StatesHQ recorded Sep 20, 2026	1,001-5,000	2,035 contacts →
	Exact match “UHY is one of the nation’s largest professional services firms providing audit, tax, consulting and advisory services to clients primarily in the dynamic middle market.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20	J.S. Held LLC	Exact match	Jericho, NY, PalestineHQ recorded Sep 20, 2026	1,001-5,000	1,954 contacts →
	Exact match “J.S.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21	BDO South Africa	Exact match	Johannesburg, South AfricaHQ recorded Sep 20, 2026	1,001-5,000	1,870 contacts →
	Exact match “Audit \| Advisory \| Tax The South African member firm of BDO International - The Leader for Exceptional Client Service since 1963 BDO clients experience a distinctive level of…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22	PWC Norway	Exact match	Oslo, NorwayHQ recorded Sep 20, 2026	1,001-5,000	1,824 contacts →
	Exact match “PwC er et ledende globalt kompetansehus som bidrar med kunnskap, innsikt og verdiskapning.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23	BDO Brazil	Exact match	Sp, BrazilHQ recorded Sep 20, 2026	1,001-5,000	1,791 contacts →
	Exact match “Presidida por Raul Corrêa da Silva, a BDO RCS foi fundada em 2001 e desde então mantém participação expressiva no mercado de auditorias.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24	Grant Thornton Sweden	Exact match	Stockholm, SwedenHQ recorded Sep 20, 2026	1,001-5,000	1,724 contacts →
	Exact match “Grant Thornton är ett ledande revisions- och rådgivningsföretag med över 1400 medarbetare som erbjuder tjänster inom revision, skatt, redovisning och specialistrådgivning.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25	Kpmg Poland	Exact match	Warsaw, PolandHQ recorded Sep 20, 2026	1,001-5,000	1,696 contacts →
	Exact match “KPMG jest globalną organizacją niezależnych firm świadczących profesjonalne usługi z zakresu audytu, doradztwa podatkowego, finansowego, prawnego oraz consultingu.” Recorded in the RevenueBase company graph · Sep 20, 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 service firms”. 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 19,227 professional service firms worldwide

See the full list, filter by size, metro and specialty, and access 326,253 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Professional service firms worldwide at a glance

As of Sep 20, 2026

35.6%Verified-email coverage

47.6Average contacts per company

1-10Median size (employees)

2.0%Largest-city concentration · Sao Paulo

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

9,595

11-50

7,133

51-200

1,740

201-500

394

501-1,000

108

1,001-5,000

113

5,001-10,000

10001+

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 service firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “professional service firms” 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 326,253 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 September 20, 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 service firms by location

83 lists · largest first

Every Professional service firms 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 service firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many professional service firms are there worldwide?

RevenueBase identified 19,227 company matches for professional service firms worldwide as of September 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 service firms?

The United States leads with 1,955 companies, followed by Brazil (1,660) and India (1,331). Every professional service firms list by country and city is linked on this page.

Which city has the most professional service firms?

Sao Paulo leads with 386 company records, followed by Paris (239) and Madrid (190).

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 326,253 professional contacts with verified work emails tracked across these 19,227 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 September 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 19,227 professional service firms worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.