Company lists · Data refreshed September 2026
Top 25 Consultancy firms based in Luxembourg
RevenueBase identified 376 consultancy firms headquartered in Luxembourg as of September 2026 and tracks 7,613 professional contacts across them, including 2,903 with verified work emails and 121 with mobile numbers. Luxembourg is the largest hub.
This list covers consultancy 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 24, 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.
The 25 largest consultancy firms based in Luxembourg
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 24, 2026Thanks. The Data Team will review it. | |||||
| 2 | 600 contacts → | ||||
Strong evidence “BDO Luxembourg is one of the largest firms of accountants, auditors and consultants in Luxembourg.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 3 | 226 contacts → | ||||
Indirect evidence “Taleo is a global independent management and delivery advisory group.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 4 | 134 contacts → | ||||
Indirect evidence “About Arendt - Regulatory & Consulting We help clients remain compliant while running a profitable business.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 5 | 124 contacts → | ||||
Indirect evidence “Vous êtes chef d’entreprise, artisan, commerçant, professionnels libéral ou du secteur financier?” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 6 | 100 contacts → | ||||
Indirect evidence “Depuis sa création en 1988, le bureau d'ingénieurs-conseils TR-Engineering apporte son concours à l'élaboration et à la réalisation de projets d'infrastructures et de programmes…” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 7 | 98 contacts → | ||||
Strong evidence “AKABI is a young and entrepreneurial IT consultancy company specialized in Business Intelligence, Software Development, Cloud and IT Infrastructure.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 8 | 84 contacts → | ||||
Indirect evidence “PROMAN is a Luxembourg based international consulting company providing services to international donor agencies, national governments, public institutions and development…” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 9 | 83 contacts → | ||||
Indirect evidence “QBuild est un bureau d’Ingénieurs-Conseils, spécialisé dans la gestion de projets immobiliers au Luxembourg et en Belgique.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 10 | 79 contacts → | ||||
Indirect evidence “INCA Ingénieurs Conseils Associés S.à.r.l.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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 24, 2026Thanks. The Data Team will review it. | |||||
| 12 | 69 contacts → | ||||
Indirect evidence “Goblet Lavandier & Associés est un des plus grands bureaux d’ingénieurs-conseils luxembourgeois spécialisé en génie technique et énergétique.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 13 | 60 contacts → | ||||
Indirect evidence “BEST Ingénieurs-Conseils : 32 ans d’excellence et d’innovation!” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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 24, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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 24, 2026Thanks. The Data Team will review it. | |||||
| 16 | 36 contacts → | ||||
Indirect evidence “Today’s regulatory environment is becoming more and more complex and challenging.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 17 | 33 contacts → | ||||
Indirect evidence “GCP Consulting is a management consulting firm specialized in strategy and change management.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 18 | 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 24, 2026Thanks. The Data Team will review it. | |||||
| 19 | 32 contacts → | ||||
Indirect evidence “Bureau d'ingénieurs-conseils dans les domaines suivants : Real Estate et Construction • Project Management et Maîtrise d’Ouvrage Déléguée • Planification générale • Concours…” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 20 | 31 contacts → | ||||
Strong 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 24, 2026Thanks. The Data Team will review it. | |||||
| 21 | 30 contacts → | ||||
Indirect evidence “Le bureau a été fondé en 1981 par Jean Schmit.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 22 | 28 contacts → | ||||
Indirect evidence “Finegan Luxembourg is part of the group Finegan, an independent French consulting firm created in 2009.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 23 | 23 contacts → | ||||
Indirect evidence “Bureau d'ingénieur-conseil spécialisé dans les domaines de l'énergie, des déchets, de l'acoustique, de la sécurité incendie et de l'environnement : études de faisabilité…” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 24 | 23 contacts → | ||||
Indirect evidence “Leverage Consulting provides Advisory and sourcing services to Financial and Insurance organisations in their IT transformation projects.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 25 | 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 24, 2026Thanks. The Data Team will review it. | |||||
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: consultancy 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 consultancy firms.
- Partial evidence
- Its own public description names part of consultancy firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name consultancy 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 376 consultancy firms based in Luxembourg
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,903 reachable decision-makers.
Free signup · no credit card
Consultancy firms based in Luxembourg at a glance
As of Sep 24, 2026Companies by employee count
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 26.0dCompany record updated
Median 64.0dHow 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 consultancy 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 “consultancy 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 consultancy 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 consultancy 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, 2,903 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 24, 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 consultancy 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 consultancy firms are there based in Luxembourg?
RevenueBase identified 376 consultancy 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 consultancy firms?
Luxembourg leads with 199 headquartered companies, followed by Bertrange (19) and Strassen (10).
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 2,903 verified decision-maker contacts tracked across these 376 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 24, 2026.
Ready to reach these companies? Verified emails and direct dials for all 376 consultancy firms based in Luxembourg. Start with a free account, no credit card.
Download this list →Related lists
Consultancy firms by geography
- Consultancy firms based in the United States
- Consultancy firms based in the United Kingdom
- Consultancy firms based in Brazil
- Consultancy firms based in France
- Consultancy firms based in Germany
- Consultancy firms based in Italy
- Consultancy firms based in Spain
- Consultancy firms based in Australia
- Consultancy firms based in the Netherlands
- Consultancy firms based in Canada
- Consultancy firms based in Mexico
- Consultancy firms based in Switzerland
Browse the directory
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.