Company lists · Data refreshed September 2026

Top 25 Advisory and outsourcing services based in Luxembourg

Name: Advisory and outsourcing services based in Luxembourg
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 374 companies tracked

RevenueBase identified 374 advisory and outsourcing services headquartered in Luxembourg as of September 2026 and tracks 8,194 professional contacts across them, including 3,056 with verified work emails and 148 with mobile numbers. Luxembourg is the largest hub.

This list covers advisory and outsourcing services 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 23, 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 23, 2026 86% judged on-target in blind review

374Companies

8,194Contacts tracked

3,056Verified emails

148Mobile numbers

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The 25 largest advisory and outsourcing services based in Luxembourg

Ranked by team size

Top 25 of 374 advisory and outsourcing services based in Luxembourg, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to advisory and outsourcing services: 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	Indirect evidence	LuxembourgHQ checked Sep 23, 2026	1,001-5,000	3,413 contacts →
	Indirect 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 23, 2026
2	BDO Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 23, 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 23, 2026
3	SOA People	Indirect evidence	Bertrange, LuxembourgHQ checked Sep 23, 2026	1,001-5,000	546 contacts →
	Indirect evidence “SOA People is one of Europe’s leading consulting and services groups specializing in SAP solutions.” Source: RevenueBase Database · checked Sep 23, 2026
4	Atoz TAX Advisers	Partial evidence	Senningerberg, LuxembourgHQ checked Sep 23, 2026	51-200	242 contacts →
	Partial evidence “We are a high-end independent advisory firm offering a comprehensive and integrated range of direct and indirect tax solutions, as well as corporate finance, transfer pricing and…” Source: RevenueBase Database · checked Sep 23, 2026
5	Atoz Services	Partial evidence	LuxembourgHQ checked Sep 23, 2026	n/a	234 contacts →
	Partial evidence “Our story begins in 2004 with the creation of the advisory firm ATOZ Tax Advisers.” Source: RevenueBase Database · checked Sep 23, 2026
6	Taleo Consulting	Partial evidence	LuxembourgHQ checked Sep 23, 2026	201-500	226 contacts →
	Partial evidence “Taleo is a global independent management and delivery advisory group.” Source: RevenueBase Database · checked Sep 23, 2026
7	Arendt Regulatory & Consulting	Indirect evidence	LuxembourgHQ checked Sep 23, 2026	51-200	134 contacts →
	Indirect evidence “About Arendt - Regulatory & Consulting We help clients remain compliant while running a profitable business.” Source: RevenueBase Database · checked Sep 23, 2026
8	In Extenso Belux	Indirect evidence	Windhof, LuxembourgHQ checked Sep 23, 2026	51-200	124 contacts →
	Indirect evidence “Vous êtes chef d’entreprise, artisan, commerçant, professionnels libéral ou du secteur financier?” Source: RevenueBase Database · checked Sep 23, 2026
9	Palana	Partial evidence	Bertrange, LuxembourgHQ checked Sep 23, 2026	51-200	74 contacts →
	Partial evidence “Palana is an advisory and service firm focusing on Asset & Wealth Management and Asset Servicing.” Source: RevenueBase Database · checked Sep 23, 2026
10	IQ Solutions Luxembourg	Indirect evidence	3364 Leudelange, LuxembourgHQ checked Sep 23, 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 23, 2026
11	ACO Human Capital	Indirect evidence	Kockelscheuer, LuxembourgHQ checked Sep 23, 2026	51-200	55 contacts →
	Indirect evidence “Alcyone Consulting propose à ses clients Grand Compte une expertise reconnue dans les métiers de l'IT, Gouvernance, Compliance et se distingue par le Savoir-Faire et Savoir-Être…” Source: RevenueBase Database · checked Sep 23, 2026
12	HB Fiduciaire	Indirect evidence	Bertrange, LuxembourgHQ checked Sep 23, 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 23, 2026
13	Hamlet Consulting Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 23, 2026	51-200	43 contacts →
	Indirect evidence “Hamlet Consulting Luxembourg is a dynamic European consulting company based in the Grand Duchy of Luxembourg.” Source: RevenueBase Database · checked Sep 23, 2026
14	Gate-16	Indirect evidence	LuxembourgHQ checked Sep 23, 2026	11-50	38 contacts →
	Indirect evidence “Founded in 2007, Gate-16 is a consulting firm specialized in IT consultancy, IT transitions & operations, as well as recruitment and HR Services.” Source: RevenueBase Database · checked Sep 23, 2026
15	NOW Partners	Indirect evidence	Hesperange, LuxembourgHQ checked Sep 23, 2026	11-50	36 contacts →
	Indirect evidence “Today’s regulatory environment is becoming more and more complex and challenging.” Source: RevenueBase Database · checked Sep 23, 2026
16	Neoviaq	Indirect evidence	Weiswampach, LuxembourgHQ checked Sep 23, 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 23, 2026
17	Square Management Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 23, 2026	501-1,000	31 contacts →
	Indirect evidence “Square Management Luxembourg is an international management & business consultancy firm, specialized in the financial sector, with offices in Luxembourg, Brussels and Paris.” Source: RevenueBase Database · checked Sep 23, 2026
18	Hoche Partners Corporate Services S.A.S	Indirect evidence	Bertrange, LuxembourgHQ checked Sep 23, 2026	11-50	31 contacts →
	Indirect evidence “Hoche Partners is a growing independent global service provider of company secretarial and fiduciary services.” Source: RevenueBase Database · checked Sep 23, 2026
19	Cabexco	Indirect evidence	Windhof, LuxembourgHQ checked Sep 23, 2026	11-50	24 contacts →
	Indirect evidence “Notre équipe composée d’experts-comptables, comptables, gestionnaires de salaires, d’un secrétariat social et d’assistantes administratives travaillent ensemble pour favoriser la…” Source: RevenueBase Database · checked Sep 23, 2026
20	Leverage Consulting Luxembourg-Genève-Paris	Partial evidence	Livange, LuxembourgHQ checked Sep 23, 2026	11-50	23 contacts →
	Partial evidence “Leverage Consulting provides Advisory and sourcing services to Financial and Insurance organisations in their IT transformation projects.” Source: RevenueBase Database · checked Sep 23, 2026
21	Taxand Your Global TAX Partner	Indirect evidence	Senningerberg, LuxembourgHQ checked Sep 23, 2026	1,001-5,000	23 contacts →
	Indirect evidence “Taxand provides high quality, integrated tax advice worldwide.” Source: RevenueBase Database · checked Sep 23, 2026
22	MGI Fisogest & MGI Groupe Fiduciaire	Indirect evidence	LuxembourgHQ checked Sep 23, 2026	11-50	22 contacts →
	Indirect evidence “Notre cabinet luxembourgeois indépendant FISOGEST S.A.” Source: RevenueBase Database · checked Sep 23, 2026
23	Ease S.A	Indirect evidence	LuxembourgHQ checked Sep 23, 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 23, 2026
24	A3t S.A	Indirect evidence	Belvaux, LuxembourgHQ checked Sep 23, 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 23, 2026
25	Kolmio	Indirect evidence	L-8410 Steinfort, LuxembourgHQ checked Sep 23, 2026	11-50	21 contacts →
	Indirect evidence “Notre concept.” Source: RevenueBase Database · checked Sep 23, 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: advisory and outsourcing services. 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 advisory and outsourcing services.
Partial evidence: Its own public description names part of advisory and outsourcing services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name advisory and outsourcing services. 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 374 advisory and outsourcing services based in Luxembourg

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Advisory and outsourcing services based in Luxembourg at a glance

As of Sep 23, 2026

37.3%Verified-email coverage

1.8%Mobile-number coverage

21.9Average contacts per company

1-10Median size (employees)

53.7%Largest-city concentration · Luxembourg

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

240

11-50

100

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 25.0d

2,3630–30

64631–60

4061–90

090–180

7180+

Company record updated

Median 64.0d

00–30

3,28431–60

3,26361–90

1,19190–180

456180+

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 advisory and outsourcing services, 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 “advisory and outsourcing services”. 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 advisory and outsourcing services), 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 advisory and outsourcing services, 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, 3,056 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 23, 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.

Advisory and outsourcing services by metro

Advisory and outsourcing services in Luxembourg201

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 advisory and outsourcing services, 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 advisory and outsourcing services are there based in Luxembourg?

RevenueBase identified 374 advisory and outsourcing services 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 advisory and outsourcing services?

Luxembourg leads with 201 headquartered companies, followed by Bertrange (20) and Strassen (14).

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 3,056 verified decision-maker contacts tracked across these 374 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 23, 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.