Company lists · Data refreshed September 2026
Top 21 Information security consulting firms based in Luxembourg
RevenueBase identified 56 information security consulting firms headquartered in Luxembourg as of September 2026 and tracks 292 professional contacts across them, including 104 with verified work emails and 9 with mobile numbers. Luxembourg is the largest hub.
This list covers information security 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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.
The 21 largest information security consulting firms based in Luxembourg
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 63 | ||||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 24 | ||||
“Grâce à ses experts certifiés Microsoft, Elgon vous conseille et vous accompagne dans votre adoption du Cloud, tout en garantissant la pérennité de votre infrastructure et de…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 22 | ||||
“dartalis is a regional leader and an independent company focused on information security since 2001.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 14 | ||||
“Cyber Security / Cloud Computing / IT Consulting / Staffing Solutions F3C Systems is specialized in providing, maintaining, and operating secure IT Infrastructure for its…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 11 | ||||
“Located and active in Luxembourg, but also in the neighbouring countries, ADRONH is a young company of Cyber Security consultants.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 9 | ||||
“Snowball Technology is a cybersecurity consulting firm focused on providing cloud security solutions and services to protect organizations and individuals from cyber threats.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 9 | ||||
“Cybersecurity Consultancy focused on delivering actionable and smart security.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 9 | ||||
“Your data must be kept safe.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 8 | ||||
“We provide independent consulting services in the information security field.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | Excellium ServicesIndirect evidence | 8 | |||
“Excellium Services is a cybersecurity services company established in Luxembourg since 2012 and more recently in Belgium, with activities and partnerships in Europe and Africa.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 7 | ||||
“itrust consulting has become a recognised and trustworthy actor in the Information Security field in Luxembourg and even throughout Europe.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 6 | ||||
“F3S – Facility, Security, Safety & Services F3S, précurseur!” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 5 | ||||
“Scott & Owens – Consulting Services provides experienced profiles to banks, asset managers, insurance companies, corporate services, regulating bodies and other financial players…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 3 | ||||
“Rempart-International en quelques mots.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 2 | ||||
“Alzette Information Security is a consulting and training company specialized in information security, providing exceptionally high quality, tailor-made services to customers…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 2 | ||||
“We provide comprehensive services to support your business by leveraging strategies to drive people, process, information and technology considerations.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | 2 | ||||
“Protéine Sàrl est une société multidisciplinaire spécialisée dans la protection des données, la stratégie en intelligence artificielle, l’outsourcing pharmaceutique, le marketing…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 2 | ||||
“IT Works SA is an independent Luxembourg based company founded in 2003 which main activity is to offer objective advices and high-end strategic and technical support.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | 1 | ||||
Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | 2s-It SarlsPartial evidence | 1 | |||
“Nos champs d’actions sont les suivants : • Audit de votre système d’information, • Renseignement sur l’utilisation de vos solutions en relation avec nos compétences • Maintenance…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1 | ||||
“N-Lux is providing high added value IT consulting services such as DevSecOps, container orchestration, Cloud Computing and IT Security.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 21 of 56 information security consulting firms based in Luxembourg
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Information security consulting firms based in Luxembourg at a glance
As of Sep 3, 2026Companies by employee count
Verified emails by last verification
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 information security consulting 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 “information security consulting 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 information security 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 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, 104 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 3, 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
How many information security consulting firms are there based in Luxembourg?
RevenueBase identified 56 information security 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?
ACO Human Capital, headquartered in Kockelscheuer Canton Of Esch-Sur-Alzette, tops this list with the largest team on record.
Which city has the most information security consulting firms?
Luxembourg leads with 24 headquartered companies, followed by Contern (2) and Esch-Sur-Alzette (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 104 verified decision-maker contacts tracked across these 56 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 3, 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.
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