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, how directly it supports the match, 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 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 HQ checked on every row Match evidence 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. Evidence rates how directly each company's own description names professional services firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	PWC LuxembourgStrong evidence	LuxembourgHQ checked Sep 5, 2026	1,001-5,000	3,413
	“PwC Luxembourg is the largest professional services firm in Luxembourg with over 3,600 people employed from 90 different countries.” Source: company website · checked Sep 5, 2026
2	BDO LuxembourgIndirect evidence	LuxembourgHQ checked Sep 5, 2026	501-1,000	600
	“BDO Luxembourg is one of the largest firms of accountants, auditors and consultants in Luxembourg.” Source: company website · checked Sep 5, 2026
3	Atoz ServicesIndirect evidence	LuxembourgHQ checked Sep 5, 2026	n/a	234
	“Our story begins in 2004 with the creation of the advisory firm ATOZ Tax Advisers.” Source: company website · checked Sep 5, 2026
4	In Extenso BeluxStrong evidence	Windhof, LuxembourgHQ checked Sep 5, 2026	51-200	124
	“Vous êtes chef d’entreprise, artisan, commerçant, professionnels libéral ou du secteur financier?” Source: company website · checked Sep 5, 2026
5	IQ Solutions LuxembourgIndirect evidence	3364 Leudelange, LuxembourgHQ checked Sep 5, 2026	51-200	73
	“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: company website · checked Sep 5, 2026
6	HB FiduciaireIndirect evidence	Bertrange, LuxembourgHQ checked Sep 5, 2026	11-50	53
	“HB Fiduciaire, based in Bertrange, Luxembourg, offers accounting, taxation, remuneration, and human resources services for businesses.” Source: company website · checked Sep 5, 2026
7	NeoviaqIndirect evidence	Weiswampach, LuxembourgHQ checked Sep 5, 2026	51-200	34
	“From the creation of your company to the management of your accounting, finances, payroll, trademark protection and more!” Source: company website · checked Sep 5, 2026
8	GT Fiduciaires S.AIndirect evidence	LuxembourgHQ checked Sep 5, 2026	51-200	26
	“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: company website · checked Sep 5, 2026
9	MGI Fisogest & MGI Groupe FiduciaireIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	22
	“Notre cabinet luxembourgeois indépendant FISOGEST S.A.” Source: company website · checked Sep 5, 2026
10	Ease S.AIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	22
	“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: company website · checked Sep 5, 2026
11	A3t S.AIndirect evidence	Belvaux, LuxembourgHQ checked Sep 5, 2026	11-50	21
	“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: company website · checked Sep 5, 2026
12	Ficel Group LuxembourgIndirect evidence	LuxembourgHQ checked Sep 5, 2026	51-200	20
	“Ficel Group est un cabinet d'experts-comptables et de consultants établi au Luxembourg.” Source: company website · checked Sep 5, 2026
13	Wildgen, Luxembourg LAW FirmIndirect evidence	L-, LuxembourgHQ checked Sep 5, 2026	51-200	20
	“Since 1923, WILDGEN has been at the heart of law practice in Luxembourg.” Source: company website · checked Sep 5, 2026
14	Fiduciaire Fernand FaberIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	19
	“Fiduciaire Fernand Faber was incorporated in 1952 by Mr.” Source: company website · checked Sep 5, 2026
15	Efitax ExpertisesIndirect evidence	Steinfort, LuxembourgHQ checked Sep 5, 2026	11-50	17
	“Cabinet d’expertise comptable et fiscale spécialisé dans le support comptable, financier et fiscal aux PME et aux particuliers.” Source: company website · checked Sep 5, 2026
16	Fiduciaire EuroluxStrong evidence	LuxembourgHQ checked Sep 5, 2026	11-50	16
	“Since 1995, FIDUCIAIRE EUROLUX offers the following professional services: High-quality accounting and internal audit, characterised by our many years of experience; preparation…” Source: company website · checked Sep 5, 2026
17	STRASIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	14
	“At STRAS, we understand that navigating the complex landscape of business requires more than just solutions; it demands a strategic approach.” Source: company website · checked Sep 5, 2026
18	Fiscogest SàrlStrong evidence	Bascharage, LuxembourgHQ checked Sep 5, 2026	11-50	13
	“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: company website · checked Sep 5, 2026
19	C Partners GroupIndirect evidence	Bertrange, LuxembourgHQ checked Sep 5, 2026	11-50	13
	“Our group consists of various companies based in Luxembourg & Portugal.” Source: company website · checked Sep 5, 2026
20	Fiduciaire DES P.M.EIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	12
	“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: company website · checked Sep 5, 2026
21	NOW Corporate SolutionsIndirect evidence	Howald, LuxembourgHQ checked Sep 5, 2026	1-10	11
	“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: company website · checked Sep 5, 2026
22	Memola & Partners S.AIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	11
	“Memola & Partners, Société Anonyme de conseil comptable, fiscal et social a été créée en 1994 et existe sous cette forme depuis 2007.” Source: company website · checked Sep 5, 2026
23	B.A. FiduciaireIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	11
	“B.A.” Source: company website · checked Sep 5, 2026
24	Corexperts S.AIndirect evidence	Rumelange, LuxembourgHQ checked Sep 5, 2026	11-50	11
	“Implanté à Luxembourg, notre cabinet dispose d'un réseau et d'une expertise transfrontalière.” Source: company website · checked Sep 5, 2026
25	B&r Consulting LuxembourgIndirect evidence	LuxembourgHQ checked Sep 5, 2026	1-10	10
	“B&R Consulting is an accounting and tax consulting firm registered with the Order of Chartered Accountants in Luxembourg.” Source: company website · checked Sep 5, 2026

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

1-10Median size (employees)

LuxembourgLargest hub · 78 HQs

66Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Verified emails by last verification

0–30

2,046

31–60

110

61–90

90–180

180+

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 evidence 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 SmartSearch, 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.
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 an evidence 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

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 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.