Company lists · Data verified August 2026

Top 9 Cybersecurity defense contractors based in Luxembourg

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 26 companies tracked

There are 26 cybersecurity defense contractors headquartered in Luxembourg (RevenueBase, August 2026). RevenueBase tracks 122 professional contacts across them, including 28 with verified work emails and 3 with mobile numbers. Luxembourg is the largest hub.

This list covers cybersecurity defense contractors headquartered in Luxembourg, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

26Companies

122Contacts tracked

28Verified emails

3Mobile numbers

Unlock all 26 companies Free account · no credit card · 2 minutes

The 9 largest cybersecurity defense contractors based in Luxembourg

Ranked by team size

Top 9 of 26 cybersecurity defense contractors based in Luxembourg, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	F3c-Systems	Luxembourg	11-50	14	6
2	Eset Belux	Dudelange	11-50	14	1
3	Adronh	Luxembourg	11-50	11	1
4	Snowball Technology	Leudelange	11-50	9	6
5	Cubic Consulting Sarl	Leudelange	1-10	9	4
6	IMRIM	Contern	1-10	8	4
7	Excellium Services	Luxembourg	51-200	8	1
8	Itrust Consulting S. À R. L	Niederanven	11-50	7	4
9	Linosec	Luxembourg	1-10	1	1

Showing 9 of 26 cybersecurity defense contractors based in Luxembourg

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 28 reachable decision-makers.

Free account · no credit card

See all 26 companies

Cybersecurity defense contractors based in Luxembourg at a glance

As of Aug 28, 2026

1-10Median size (employees)

LuxembourgLargest hub · 11 HQs

3Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Cybersecurity defense contractors by metro

Metro	Companies
Cybersecurity defense contractors in Luxembourg	11
Cybersecurity defense contractors in Leudelange	2
Cybersecurity defense contractors in Esch-Sur-Alzette	2
Cybersecurity defense contractors in Windhof	1
Cybersecurity defense contractors in Flaxweiler Grevenmacher	1
Cybersecurity defense contractors in Dalheim	1
Cybersecurity defense contractors in Senningerberg	1
Cybersecurity defense contractors in Niederanven	1

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cybersecurity defense contractors”, with match quality audited by blind human judging, and headquartered in Luxembourg.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cybersecurity defense contractors are there based in Luxembourg?

There are 26 cybersecurity defense contractors headquartered in Luxembourg as of August 2026 (RevenueBase).

What is the largest company on this list?

F3c-Systems, headquartered in Luxembourg, tops this list with the largest team on record.

Which city has the most cybersecurity defense contractors?

Luxembourg leads with 11 headquartered companies, followed by Leudelange (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 28 verified decision-maker contacts tracked across these 26 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 26 cybersecurity defense contractors based in Luxembourg. Start with a free account, no credit card.

Get the full list

Related lists

Cybersecurity defense contractors by geography

Browse the directory

Browse: Companies home · All Luxembourg lists · All Cybersecurity defense contractors lists · New lists

About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.