Company lists · Data refreshed September 2026

Top 25 Big 5 consulting firms based in Luxembourg

Name: Big 5 consulting firms based in Luxembourg
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 92 companies tracked

RevenueBase identified 92 big 5 consulting firms headquartered in Luxembourg as of September 2026 and tracks 4,750 professional contacts across them, including 1,796 with verified work emails and 77 with mobile numbers. Luxembourg is the largest hub.

This list covers big 5 consulting 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 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

92Companies

4,750Contacts tracked

1,796Verified emails

77Mobile numbers

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The 25 largest big 5 consulting firms based in Luxembourg

Ranked by team size

Top 25 of 92 big 5 consulting firms 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 big 5 consulting 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	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	Taleo Consulting	Indirect evidence	LuxembourgHQ checked Sep 23, 2026	201-500	226 contacts →
	Indirect evidence “Taleo is a global independent management and delivery advisory group.” Source: RevenueBase Database · checked Sep 23, 2026
3	Resultance	Partial evidence	Strassen, LuxembourgHQ checked Sep 23, 2026	51-200	106 contacts →
	Partial evidence “Resultance is a consulting group originally founded in Luxembourg and now operating across several European countries, including France, Belgium, and the UK.” Source: RevenueBase Database · checked Sep 23, 2026
4	CTG IT Solutions - Europe	Indirect evidence	Bertrange, LuxembourgHQ checked Sep 23, 2026	1,001-5,000	97 contacts →
	Indirect evidence “CTG serves as a catalyst for your digital transformation, offering innovative solutions and services that accelerate your strategy and project momentum.” Source: RevenueBase Database · checked Sep 23, 2026
5	ACO Human Capital	Partial evidence	Kockelscheuer, LuxembourgHQ checked Sep 23, 2026	51-200	55 contacts →
	Partial 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
6	Hamlet Consulting Luxembourg	Partial evidence	LuxembourgHQ checked Sep 23, 2026	51-200	43 contacts →
	Partial evidence “Hamlet Consulting Luxembourg is a dynamic European consulting company based in the Grand Duchy of Luxembourg.” Source: RevenueBase Database · checked Sep 23, 2026
7	Gate-16	Partial evidence	LuxembourgHQ checked Sep 23, 2026	11-50	38 contacts →
	Partial 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
8	GCP Consulting	Partial evidence	LuxembourgHQ checked Sep 23, 2026	11-50	33 contacts →
	Partial evidence “GCP Consulting is a management consulting firm specialized in strategy and change management.” Source: RevenueBase Database · checked Sep 23, 2026
9	SCS Consulting	Indirect evidence	LuxembourgHQ checked Sep 23, 2026	51-200	33 contacts →
	Indirect evidence “SCS est une structure de conseil opérationnel en gestion et exécution de projets pour le secteur financier créée en 1993 au Luxembourg.” Source: RevenueBase Database · checked Sep 23, 2026
10	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
11	Finegan Luxembourg	Partial evidence	LuxembourgHQ checked Sep 23, 2026	11-50	28 contacts →
	Partial evidence “Finegan Luxembourg is part of the group Finegan, an independent French consulting firm created in 2009.” Source: RevenueBase Database · checked Sep 23, 2026
12	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
13	Ease S.A	Partial evidence	LuxembourgHQ checked Sep 23, 2026	11-50	22 contacts →
	Partial 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
14	UFO Consulting	Partial evidence	LuxembourgHQ checked Sep 23, 2026	11-50	22 contacts →
	Partial evidence “As a Technology and Organisation Consulting firm in Luxembourg and Paris, we accelerate the transformation of your business on a daily basis.” Source: RevenueBase Database · checked Sep 23, 2026
15	OYESK	Indirect evidence	Bertrange, LuxembourgHQ checked Sep 23, 2026	51-200	18 contacts →
	Indirect evidence “Welcome to Oyesk!” Source: RevenueBase Database · checked Sep 23, 2026
16	STRAS	Indirect evidence	LuxembourgHQ checked Sep 23, 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 23, 2026
17	Eurogroup Consulting Luxembourg	Partial evidence	LuxembourgHQ checked Sep 23, 2026	11-50	12 contacts →
	Partial evidence “Groupe de conseil volontairement européen et indépendant, Eurogroup Consulting est un cabinet de conseil en stratégie et en organisation d'entreprise, composés de praticiens et de…” Source: RevenueBase Database · checked Sep 23, 2026
18	Diginius Consulting	Partial evidence	LuxembourgHQ checked Sep 23, 2026	11-50	11 contacts →
	Partial evidence “Diginius Consulting – Your partner for digital transformation.” Source: RevenueBase Database · checked Sep 23, 2026
19	Axon Advisory & Consulting	Partial evidence	Flaxweiler, LuxembourgHQ checked Sep 23, 2026	11-50	10 contacts →
	Partial evidence “We offer unorthodox management advisory and consulting services.” Source: RevenueBase Database · checked Sep 23, 2026
20	Lux-Advisory	Indirect evidence	LuxembourgHQ checked Sep 23, 2026	11-50	8 contacts →
	Indirect evidence “Lux-Advisory est un cabinet de conseil spécialisé en finance, gestion de projets et de programmes, gestion du changement, analyse fonctionnelle et technique, développement…” Source: RevenueBase Database · checked Sep 23, 2026
21	Avantage Reply	Indirect evidence	LuxembourgHQ checked Sep 23, 2026	201-500	7 contacts →
	Indirect evidence “Avantage Reply (a member of Reply Group) is a pan-European specialised management consultancy delivering change initiatives in Risk, Compliance, Finance (Capital Management and…” Source: RevenueBase Database · checked Sep 23, 2026
22	Aurrera Consulting	Indirect evidence	LuxembourgHQ checked Sep 23, 2026	1-10	6 contacts →
	Indirect evidence “Developing and supporting IT Transformation projects and solutions” Source: RevenueBase Database · checked Sep 23, 2026
23	Thecatalysts	Partial evidence	LuxembourgHQ checked Sep 23, 2026	1-10	5 contacts →
	Partial evidence “theCatalysts is a management consulting and transactions advisory firm providing high quality support based on a 25+ year experience, in order to secure the most delicate missions.” Source: RevenueBase Database · checked Sep 23, 2026
24	H Valoris	Partial evidence	LuxembourgHQ checked Sep 23, 2026	11-50	5 contacts →
	Partial evidence “H Valoris is a dynamic management and technology consulting firm, renowned for its collaborative, innovative, and client-centric approach.” Source: RevenueBase Database · checked Sep 23, 2026
25	Codare	Indirect evidence	LuxembourgHQ checked Sep 23, 2026	1-10	4 contacts →
	Indirect evidence “Philosophy: Our engagement in business transformation is anchored in three beliefs: • Gaps between traditional and digital business cultures shall be bridged: a strategy should…” 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: big 5 consulting 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 big 5 consulting firms.
Partial evidence: Its own public description names part of big 5 consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name big 5 consulting 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 92 big 5 consulting firms based in Luxembourg

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Big 5 consulting firms based in Luxembourg at a glance

As of Sep 23, 2026

37.8%Verified-email coverage

1.6%Mobile-number coverage

51.6Average contacts per company

1-10Median size (employees)

57.6%Largest-city concentration · Luxembourg

Sep 23, 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 were verified and the company information checked

Email last verified

Median 25.0d

1,4100–30

35631–60

2561–90

090–180

5180+

Company record updated

Median 63.0d

00–30

2,11231–60

1,84361–90

50090–180

295180+

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 big 5 consulting 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 “big 5 consulting 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 big 5 consulting 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 big 5 consulting 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, 1,796 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.

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 big 5 consulting 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 big 5 consulting firms are there based in Luxembourg?

RevenueBase identified 92 big 5 consulting 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 big 5 consulting firms?

Luxembourg leads with 53 headquartered companies, followed by Bertrange (5) and Remich Grevenmacher (2).

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 1,796 verified decision-maker contacts tracked across these 92 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.