Company lists · Data refreshed September 2026

Top 25 Professional services firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 85,239 companies tracked

RevenueBase identified 85,239 professional services firms worldwide as of September 2026 and tracks 996,845 professional contacts across them, including 359,946 with verified work emails and 166,443 with mobile numbers. The United States is the largest market and Sao Paulo the largest hub.

This list covers professional services firms 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 5, 2026. Country and city lists for professional services firms 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 5, 2026 86% judged on-target in blind review

85,239Companies

996,845Contacts tracked

359,946Verified emails

166,443Mobile numbers

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The 25 largest professional services firms worldwide

Ranked by team size

Top 25 of 85,239 professional services firms worldwide, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to professional services 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	Kpmg UK	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	10001+	14,509 contacts →
	Indirect evidence “Make growth happen.” Source: RevenueBase Database · checked Sep 5, 2026
2	Kpmg Australia	Indirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	5,001-10,000	9,024 contacts →
	Indirect evidence “Welcome to KPMG.” Source: RevenueBase Database · checked Sep 5, 2026
3	MNP	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 5, 2026	5,001-10,000	8,773 contacts →
	Indirect evidence “MNP is a leading national accounting, tax and business consulting firm in Canada.” Source: RevenueBase Database · checked Sep 5, 2026
4	BDO UK	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	5,001-10,000	6,933 contacts →
	Indirect evidence “BDO LLP is an accountancy and business advisory firm that provides Audit, Tax, Deals, and Consulting, Risk & Outsourcing (CR & O) services to entrepreneurial, growing and…” Source: RevenueBase Database · checked Sep 5, 2026
5	Kpmg France	Indirect evidence	Paris La Défense, FranceHQ checked Sep 5, 2026	10001+	5,839 contacts →
	Indirect evidence “Leader de l'audit, du conseil et de l'expertise comptable, KPMG France est membre de KPMG International, réseau de cabinets indépendants exerçant dans 155 pays.” Source: RevenueBase Database · checked Sep 5, 2026
6	PWC Luxembourg	Strong evidence	LuxembourgHQ checked Sep 5, 2026	1,001-5,000	3,413 contacts →
	Strong evidence “PwC Luxembourg is the largest professional services firm in Luxembourg with over 3,600 people employed from 90 different countries.” Source: RevenueBase Database · checked Sep 5, 2026
7	In Extenso	Indirect evidence	Lyon, FranceHQ checked Sep 5, 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 5, 2026
8	Kpmg Ireland	Strong evidence	Dublin 2, IrelandHQ checked Sep 5, 2026	1,001-5,000	2,952 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 5, 2026
9	Garrigues	Indirect evidence	Madrid, SpainHQ checked Sep 5, 2026	1,001-5,000	2,853 contacts →
	Indirect evidence “Garrigues is an international legal and tax services firm that advises clients locally, regionally and globally from every angle of business law.” Source: RevenueBase Database · checked Sep 5, 2026
10	Minterellison	Indirect evidence	AustraliaHQ checked Sep 5, 2026	1,001-5,000	2,667 contacts →
	Indirect evidence “MinterEllison is one of Australia’s largest independent law and consulting firms.” Source: RevenueBase Database · checked Sep 5, 2026
11	Grant Thornton Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 5, 2026	1,001-5,000	2,374 contacts →
	Indirect evidence “In Ireland, Grant Thornton Ireland and Grant Thornton Corporate Finance Limited (and their respective subsidiary/affiliate entities) operate under an alternative practice…” Source: RevenueBase Database · checked Sep 5, 2026
12	PWC Sweden	Indirect evidence	Stockholm, SwedenHQ checked Sep 5, 2026	1,001-5,000	2,276 contacts →
	Indirect evidence “På PwC hjälper vi våra kunder att bygga förtroende och ställa om sin verksamhet för att öka konkurrenskraften.” Source: RevenueBase Database · checked Sep 5, 2026
13	Moore Global	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	5,001-10,000	2,047 contacts →
	Indirect evidence “At Moore, our purpose is to help people thrive – our clients, our people and the communities they live and work in.” Source: RevenueBase Database · checked Sep 5, 2026
14	TAX Consultant	Indirect evidence	Brighton, United KingdomHQ checked Sep 5, 2026	n/a	2,042 contacts →
	Indirect evidence “A traditional general practice, with a twist.” Source: RevenueBase Database · checked Sep 5, 2026
15	S&w	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	1,930 contacts →
	Indirect evidence “As a fast growing UK accounting and advisory firm, we’ve been there, as a trusted partner, helping businesses and individuals meet challenges and seize opportunities across…” Source: RevenueBase Database · checked Sep 5, 2026
16	BDO South Africa	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 5, 2026	1,001-5,000	1,870 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 5, 2026
17	PWC Norway	Indirect evidence	Oslo, NorwayHQ checked Sep 5, 2026	1,001-5,000	1,824 contacts →
	Indirect evidence “PwC er et ledende globalt kompetansehus som bidrar med kunnskap, innsikt og verdiskapning.” Source: RevenueBase Database · checked Sep 5, 2026
18	TLT LLP	Indirect evidence	Bristol, United KingdomHQ checked Sep 5, 2026	1,001-5,000	1,797 contacts →
	Indirect evidence “We’re your business advisers as well as your lawyers, working in step with you to protect your interests today and progress your ambitions for tomorrow.” Source: RevenueBase Database · checked Sep 5, 2026
19	BDO Brazil	Indirect evidence	Sp, BrazilHQ checked Sep 5, 2026	1,001-5,000	1,791 contacts →
	Indirect evidence “Presidida por Raul Corrêa da Silva, a BDO RCS foi fundada em 2001 e desde então mantém participação expressiva no mercado de auditorias.” Source: RevenueBase Database · checked Sep 5, 2026
20	Grant Thornton Sweden	Indirect evidence	Stockholm, SwedenHQ checked Sep 5, 2026	1,001-5,000	1,724 contacts →
	Indirect evidence “Grant Thornton är ett ledande revisions- och rådgivningsföretag med över 1400 medarbetare som erbjuder tjänster inom revision, skatt, redovisning och specialistrådgivning.” Source: RevenueBase Database · checked Sep 5, 2026
21	Kpmg Poland	Indirect evidence	Warsaw, PolandHQ checked Sep 5, 2026	1,001-5,000	1,696 contacts →
	Indirect evidence “KPMG jest globalną organizacją niezależnych firm świadczących profesjonalne usługi z zakresu audytu, doradztwa podatkowego, finansowego, prawnego oraz consultingu.” Source: RevenueBase Database · checked Sep 5, 2026
22	BDO Germany	Indirect evidence	Hamburg, GermanyHQ checked Sep 5, 2026	1,001-5,000	1,576 contacts →
	Indirect evidence “BDO is the leading entrepreneurial driven provider for audit and audit-related services, tax and business law consulting as well as advisory services.” Source: RevenueBase Database · checked Sep 5, 2026
23	Beierholm	Indirect evidence	Aalborg, DenmarkHQ checked Sep 5, 2026	1,001-5,000	1,568 contacts →
	Indirect evidence “Beierholm is the preferred auditing and consulting company for small and medium-sized companies in Denmark.” Source: RevenueBase Database · checked Sep 5, 2026
24	BDO Norge	Indirect evidence	Oslo, NorwayHQ checked Sep 5, 2026	1,001-5,000	1,530 contacts →
	Indirect evidence “We see great value in having a local presence and roots, factors which enable us to work closely with our clients.” Source: RevenueBase Database · checked Sep 5, 2026
25	Kpmg Norway	Indirect evidence	Oslo, NorwayHQ checked Sep 5, 2026	1,001-5,000	1,498 contacts →
	Indirect evidence “KPMG er mest kjent som revisorer, forretningskonsulenter og advokater, men vi er også mye mer.” Source: RevenueBase Database · checked Sep 5, 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: professional services 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 professional services firms.
Partial evidence: Its own public description names part of professional services firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name professional services 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 85,239 professional services firms worldwide

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Professional services firms worldwide at a glance

As of Sep 5, 2026

36.1%Verified-email coverage

16.7%Mobile-number coverage

11.7Average contacts per company

1-10Median size (employees)

3.0%Largest-city concentration · Sao Paulo

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

55,402

11-50

24,003

51-200

3,951

201-500

615

501-1,000

204

1,001-5,000

200

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 professional services 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.
Coverage: 43 countries, largest first: the United States, Brazil, the United Kingdom, Germany, Spain, France, Italy, Australia, Canada, the Netherlands and 33 more. Country and city lists for professional services firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “professional services 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 professional services 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 professional services firms, 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, 359,946 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 5, 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.

Professional services firms by location

383 lists · largest first

Every Professional services 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 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 professional services 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 professional services firms are there worldwide?

RevenueBase identified 85,239 professional services firms 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?

Kpmg UK, headquartered in London, tops this list with the largest team on record.

Which country has the most professional services firms?

The United States leads with 22,273 companies, followed by Brazil (13,861) and the United Kingdom (5,677). Every professional services firms list by country and city is linked on this page.

Which city has the most professional services firms?

Sao Paulo leads with 2543 headquartered companies, followed by London (1320) and Paris (857).

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 359,946 verified decision-maker contacts tracked across these 85,239 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 5, 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.