Company lists · Data refreshed September 2026

Top 25 Cybersecurity consultancies based in Luxembourg

Name: Cybersecurity consultancies based in Luxembourg
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 90 companies tracked

RevenueBase identified 90 cybersecurity consultancies headquartered in Luxembourg as of September 2026 and tracks 671 professional contacts across them, including 273 with verified work emails and 25 with mobile numbers. Luxembourg is the largest hub.

This list covers cybersecurity consultancies 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 24, 2026 86% judged on-target in blind review

90Companies

671Contacts tracked

273Verified emails

25Mobile numbers

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The 25 largest cybersecurity consultancies based in Luxembourg

Ranked by team size

Top 25 of 90 cybersecurity consultancies based in Luxembourg, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity consultancies: 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	QBA Worldwide	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	201-500	163 contacts →
	Indirect evidence “Transforming Technology into Business Impact At QBA, we believe technology should not just work-it should transform.” Source: RevenueBase Database · checked Sep 24, 2026
2	ACO Human Capital	Indirect evidence	Kockelscheuer, LuxembourgHQ checked Sep 24, 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 24, 2026
3	Simac PSF	Indirect evidence	Leudelange, LuxembourgHQ checked Sep 24, 2026	51-200	37 contacts →
	Indirect evidence “Simac PSF – Your Trusted IT Partner in Luxembourg Simac PSF was established in 1997 in Luxembourg.” Source: RevenueBase Database · checked Sep 24, 2026
4	Squaremiled	Indirect evidence	Peppange, LuxembourgHQ checked Sep 24, 2026	11-50	31 contacts →
	Indirect evidence “Squaremiled: Your Digital Infrastructure, Simplified and Secured.” Source: RevenueBase Database · checked Sep 24, 2026
5	ELGON	Indirect evidence	Windhof, LuxembourgHQ checked Sep 24, 2026	51-200	23 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 24, 2026
6	Dartalis	Indirect evidence	Contern, LuxembourgHQ checked Sep 24, 2026	11-50	22 contacts →
	Indirect evidence “dartalis is a regional leader and an independent company focused on information security since 2001.” Source: RevenueBase Database · checked Sep 24, 2026
7	Eset Belux	Indirect evidence	Dudelange, LuxembourgHQ checked Sep 24, 2026	11-50	14 contacts →
	Indirect evidence “La technologie améliore notre quotidien et transforme les pratiques professionnelles bien au-delà de ce que l’on aurait pu imaginer.” Source: RevenueBase Database · checked Sep 24, 2026
8	F3c-Systems	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	11-50	13 contacts →
	Indirect evidence “Cyber Security / Cloud Computing / IT Consulting / Staffing Solutions F3C Systems is specialized in providing, maintaining, and operating secure IT Infrastructure for its…” Source: RevenueBase Database · checked Sep 24, 2026
9	Global IT Services PSF	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	11-50	11 contacts →
	Indirect evidence “Empowering Your Business with Secure & Scalable IT Solutions Since 2005, Global IT Services PSF (GITS PSF) has been a trusted Luxembourg-based partner, delivering high-performance…” Source: RevenueBase Database · checked Sep 24, 2026
10	Adronh	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	11-50	11 contacts →
	Indirect evidence “Located and active in Luxembourg, but also in the neighbouring countries, ADRONH is a young company of Cyber Security consultants.” Source: RevenueBase Database · checked Sep 24, 2026
11	Cubic Consulting Sarl	Partial evidence	Leudelange, LuxembourgHQ checked Sep 24, 2026	1-10	10 contacts →
	Partial evidence “Cybersecurity Consultancy focused on delivering actionable and smart security.” Source: RevenueBase Database · checked Sep 24, 2026
12	Snowball Technology	Partial evidence	Leudelange, LuxembourgHQ checked Sep 24, 2026	11-50	9 contacts →
	Partial evidence “Snowball Technology is a cybersecurity consulting firm focused on providing cloud security solutions and services to protect organizations and individuals from cyber threats.” Source: RevenueBase Database · checked Sep 24, 2026
13	Quite Good	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	1-10	9 contacts →
	Indirect evidence “Your data must be kept safe.” Source: RevenueBase Database · checked Sep 24, 2026
14	IMRIM	Indirect evidence	Contern, LuxembourgHQ checked Sep 24, 2026	1-10	8 contacts →
	Indirect evidence “We provide independent consulting services in the information security field.” Source: RevenueBase Database · checked Sep 24, 2026
15	Itrust Consulting S. À R. L	Indirect evidence	Niederanven, LuxembourgHQ checked Sep 24, 2026	11-50	8 contacts →
	Indirect evidence “itrust consulting has become a recognised and trustworthy actor in the Information Security field in Luxembourg and even throughout Europe.” Source: RevenueBase Database · checked Sep 24, 2026
16	Excellium Services	Partial evidence	LuxembourgHQ checked Sep 24, 2026	51-200	8 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 24, 2026
17	F3s	Indirect evidence	Steinfort, LuxembourgHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “F3S – Facility, Security, Safety & Services F3S, précurseur!” Source: RevenueBase Database · checked Sep 24, 2026
18	Scott & Owens	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	11-50	5 contacts →
	Indirect evidence “Scott & Owens – Consulting Services provides experienced profiles to banks, asset managers, insurance companies, corporate services, regulating bodies and other financial players…” Source: RevenueBase Database · checked Sep 24, 2026
19	Innoviction	Indirect evidence	Dudelange, LuxembourgHQ checked Sep 24, 2026	1-10	5 contacts →
	Indirect evidence “When it comes to IT and Digital Services, you deserve effectiveness and quality.” Source: RevenueBase Database · checked Sep 24, 2026
20	Itrs S.À R.L	Indirect evidence	Hosingen, LuxembourgHQ checked Sep 24, 2026	1-10	4 contacts →
	Indirect evidence “Wir sind ein innovatives Start-Up Unternehmen Mit Tätigkeiten in folgenden Bereichen: • Informatik für sicheres Netzwerk und eine Solide Grundstruktur • Technik für mehr…” Source: RevenueBase Database · checked Sep 24, 2026
21	Security Solutions Luxembourg	Indirect evidence	Filsdorf, LuxembourgHQ checked Sep 24, 2026	1-10	3 contacts →
	Indirect evidence “Die Firma SSL ist Ihr Ansprechpartner in Luxembourg, wenn es um den Vertrieb von professionellen Sicherheits- und ICT- Lösungen geht.” Source: RevenueBase Database · checked Sep 24, 2026
22	Rempart International	Indirect evidence	Howald, LuxembourgHQ checked Sep 24, 2026	11-50	3 contacts →
	Indirect evidence “Rempart-International en quelques mots.” Source: RevenueBase Database · checked Sep 24, 2026
23	OMLOD	Indirect evidence	Strassen, LuxembourgHQ checked Sep 24, 2026	1-10	3 contacts →
	Indirect evidence “omlod is active in Information Security Compliance and in the Lottery Industry.” Source: RevenueBase Database · checked Sep 24, 2026
24	Alzette Information Security	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	1-10	2 contacts →
	Indirect evidence “Alzette Information Security is a consulting and training company specialized in information security, providing exceptionally high quality, tailor-made services to customers…” Source: RevenueBase Database · checked Sep 24, 2026
25	Ogma Consulting	Indirect evidence	Windhof, LuxembourgHQ checked Sep 24, 2026	1-10	2 contacts →
	Indirect evidence “We provide comprehensive services to support your business by leveraging strategies to drive people, process, information and technology considerations.” Source: RevenueBase Database · checked Sep 24, 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: cybersecurity consultancies. 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 cybersecurity consultancies.
Partial evidence: Its own public description names part of cybersecurity consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity consultancies. 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 90 cybersecurity consultancies based in Luxembourg

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Cybersecurity consultancies based in Luxembourg at a glance

As of Sep 24, 2026

40.7%Verified-email coverage

3.7%Mobile-number coverage

7.5Average contacts per company

1-10Median size (employees)

44.4%Largest-city concentration · Luxembourg

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Freshness & accuracy

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

Email last verified

Median 28.0d

1930–30

7531–60

561–90

090–180

0180+

Company record updated

Median 73.0d

00–30

19231–60

29661–90

13690–180

47180+

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 cybersecurity consultancies, 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 “cybersecurity consultancies”. 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 cybersecurity consultancies), 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 cybersecurity consultancies, 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, 273 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.

Cybersecurity consultancies by metro

Cybersecurity consultancies in Luxembourg40

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 cybersecurity consultancies, 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 cybersecurity consultancies are there based in Luxembourg?

RevenueBase identified 90 cybersecurity consultancies 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?

QBA Worldwide, headquartered in Luxembourg, tops this list with the largest team on record.

Which city has the most cybersecurity consultancies?

Luxembourg leads with 40 headquartered companies, followed by Esch-Sur-Alzette (3) and Leudelange (3).

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 273 verified decision-maker contacts tracked across these 90 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.

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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.