Company lists · Data refreshed September 2026

Top 25 Professional services firms based in Luxembourg

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 153 companies tracked

RevenueBase identified 153 professional services firms headquartered in Luxembourg as of September 2026 and tracks 5,391 professional contacts across them, including 2,160 with verified work emails and 66 with mobile numbers. Luxembourg is the largest hub.

This list covers professional services firms headquartered in Luxembourg, 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.

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

153Companies

5,391Contacts tracked

2,160Verified emails

66Mobile numbers

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The 25 largest professional services firms based in Luxembourg

Ranked by team size

Top 25 of 153 professional services firms based in Luxembourg, 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	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
2	BDO Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 5, 2026	501-1,000	600 contacts →
	Indirect evidence “BDO Luxembourg is one of the largest firms of accountants, auditors and consultants in Luxembourg.” Source: RevenueBase Database · checked Sep 5, 2026
3	Atoz Services	Indirect evidence	LuxembourgHQ checked Sep 5, 2026	n/a	234 contacts →
	Indirect evidence “Our story begins in 2004 with the creation of the advisory firm ATOZ Tax Advisers.” Source: RevenueBase Database · checked Sep 5, 2026
4	In Extenso Belux	Strong evidence	Windhof, LuxembourgHQ checked Sep 5, 2026	51-200	124 contacts →
	Strong evidence “Vous êtes chef d’entreprise, artisan, commerçant, professionnels libéral ou du secteur financier?” Source: RevenueBase Database · checked Sep 5, 2026
5	IQ Solutions Luxembourg	Indirect evidence	3364 Leudelange, LuxembourgHQ checked Sep 5, 2026	51-200	73 contacts →
	Indirect evidence “Solutions for business partners - Independent solutions for changing times IQ Solutions is one of the largest players in the Luxembourg financial market and offer consulting…” Source: RevenueBase Database · checked Sep 5, 2026
6	HB Fiduciaire	Indirect evidence	Bertrange, LuxembourgHQ checked Sep 5, 2026	11-50	53 contacts →
	Indirect evidence “HB Fiduciaire, based in Bertrange, Luxembourg, offers accounting, taxation, remuneration, and human resources services for businesses.” Source: RevenueBase Database · checked Sep 5, 2026
7	Neoviaq	Indirect evidence	Weiswampach, LuxembourgHQ checked Sep 5, 2026	51-200	34 contacts →
	Indirect evidence “From the creation of your company to the management of your accounting, finances, payroll, trademark protection and more!” Source: RevenueBase Database · checked Sep 5, 2026
8	GT Fiduciaires S.A	Indirect evidence	LuxembourgHQ checked Sep 5, 2026	51-200	26 contacts →
	Indirect evidence “Thanks to a team of specialists in the field of accounting, tax, social security and consulting, we assist SMEs and businesses of all sizes in the management of their daily lives.” Source: RevenueBase Database · checked Sep 5, 2026
9	MGI Fisogest & MGI Groupe Fiduciaire	Indirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	22 contacts →
	Indirect evidence “Notre cabinet luxembourgeois indépendant FISOGEST S.A.” Source: RevenueBase Database · checked Sep 5, 2026
10	Ease S.A	Indirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	22 contacts →
	Indirect evidence “Located in Luxembourg, EASE S.A is a management consulting firm driven to provide you with a competitive edge in an increasingly complex and interconnected marketplace.” Source: RevenueBase Database · checked Sep 5, 2026
11	A3t S.A	Indirect evidence	Belvaux, LuxembourgHQ checked Sep 5, 2026	11-50	21 contacts →
	Indirect evidence “We enable clients operating in all sectors to create and manage growth by providing them timely, accurate and prudent advice on audit, accountancy, corporate and financial…” Source: RevenueBase Database · checked Sep 5, 2026
12	Ficel Group Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 5, 2026	51-200	20 contacts →
	Indirect evidence “Ficel Group est un cabinet d'experts-comptables et de consultants établi au Luxembourg.” Source: RevenueBase Database · checked Sep 5, 2026
13	Wildgen, Luxembourg LAW Firm	Indirect evidence	L-, LuxembourgHQ checked Sep 5, 2026	51-200	20 contacts →
	Indirect evidence “Since 1923, WILDGEN has been at the heart of law practice in Luxembourg.” Source: RevenueBase Database · checked Sep 5, 2026
14	Fiduciaire Fernand Faber	Indirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	19 contacts →
	Indirect evidence “Fiduciaire Fernand Faber was incorporated in 1952 by Mr.” Source: RevenueBase Database · checked Sep 5, 2026
15	Efitax Expertises	Indirect evidence	Steinfort, LuxembourgHQ checked Sep 5, 2026	11-50	17 contacts →
	Indirect evidence “Cabinet d’expertise comptable et fiscale spécialisé dans le support comptable, financier et fiscal aux PME et aux particuliers.” Source: RevenueBase Database · checked Sep 5, 2026
16	Fiduciaire Eurolux	Strong evidence	LuxembourgHQ checked Sep 5, 2026	11-50	16 contacts →
	Strong evidence “Since 1995, FIDUCIAIRE EUROLUX offers the following professional services: High-quality accounting and internal audit, characterised by our many years of experience; preparation…” Source: RevenueBase Database · checked Sep 5, 2026
17	STRAS	Indirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	14 contacts →
	Indirect evidence “At STRAS, we understand that navigating the complex landscape of business requires more than just solutions; it demands a strategic approach.” Source: RevenueBase Database · checked Sep 5, 2026
18	Fiscogest Sàrl	Strong evidence	Bascharage, LuxembourgHQ checked Sep 5, 2026	11-50	13 contacts →
	Strong evidence “La société Fiscogest S.à r.l, créée en 2007, est une équipe de professionnels jeunes et dynamiques vous garantissant un service de confiance personnalisé.” Source: RevenueBase Database · checked Sep 5, 2026
19	C Partners Group	Indirect evidence	Bertrange, LuxembourgHQ checked Sep 5, 2026	11-50	13 contacts →
	Indirect evidence “Our group consists of various companies based in Luxembourg & Portugal.” Source: RevenueBase Database · checked Sep 5, 2026
20	Fiduciaire DES P.M.E	Indirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	12 contacts →
	Indirect evidence “L’expertise comptable, le conseil fiscal, l’administration et la gestion du personnel pour suivre la rentabilité de l’entreprise et optimiser la prise de décision.” Source: RevenueBase Database · checked Sep 5, 2026
21	NOW Corporate Solutions	Indirect evidence	Howald, LuxembourgHQ checked Sep 5, 2026	1-10	11 contacts →
	Indirect evidence “NoW Corporate Solutions is a new generation accounting firm providing specialized bespoke services and guidance for business firms as well as for real estate, private equity, or…” Source: RevenueBase Database · checked Sep 5, 2026
22	Memola & Partners S.A	Indirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	11 contacts →
	Indirect evidence “Memola & Partners, Société Anonyme de conseil comptable, fiscal et social a été créée en 1994 et existe sous cette forme depuis 2007.” Source: RevenueBase Database · checked Sep 5, 2026
23	B.A. Fiduciaire	Indirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	11 contacts →
	Indirect evidence “B.A.” Source: RevenueBase Database · checked Sep 5, 2026
24	Corexperts S.A	Indirect evidence	Rumelange, LuxembourgHQ checked Sep 5, 2026	11-50	11 contacts →
	Indirect evidence “Implanté à Luxembourg, notre cabinet dispose d'un réseau et d'une expertise transfrontalière.” Source: RevenueBase Database · checked Sep 5, 2026
25	B&r Consulting Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 5, 2026	1-10	10 contacts →
	Indirect evidence “B&R Consulting is an accounting and tax consulting firm registered with the Order of Chartered Accountants in Luxembourg.” 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 153 professional services firms based in Luxembourg

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Professional services firms based in Luxembourg at a glance

As of Sep 5, 2026

40.1%Verified-email coverage

1.2%Mobile-number coverage

35.2Average contacts per company

1-10Median size (employees)

51.0%Largest-city concentration · Luxembourg

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

2,0460–30

11031–60

061–90

090–180

4180+

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.
What qualifies: Companies headquartered in Luxembourg 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. Companies headquartered outside Luxembourg 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, 2,160 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 metro

Professional services firms in Luxembourg78

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 based in Luxembourg?

RevenueBase identified 153 professional services firms headquartered in Luxembourg 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?

PWC Luxembourg, headquartered in Luxembourg, tops this list with the largest team on record.

Which city has the most professional services firms?

Luxembourg leads with 78 headquartered companies, followed by Bertrange (8) and Strassen (7).

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 2,160 verified decision-maker contacts tracked across these 153 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.