Company lists · Data verified August 2026
Top 12 Cybersecurity firms based in Luxembourg
There are 41 cybersecurity firms headquartered in Luxembourg (RevenueBase, August 2026). RevenueBase tracks 217 professional contacts across them, including 56 with verified work emails and 4 with mobile numbers. Luxembourg is the largest hub.
This list covers cybersecurity firms 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.
The 12 largest cybersecurity firms based in Luxembourg
Ranked by team size| # | Company | Verified emails |
|---|---|---|
| 1 |  Incert GIE | 26 |
| 2 |  F3c-Systems | 6 |
| 3 |  Eset Belux | 1 |
| 4 |  Adronh | 1 |
| 5 |  Snowball Technology | 6 |
| 6 |  Cubic Consulting Sarl | 4 |
| 7 |  IMRIM | 4 |
| 8 | Excellium Services | 1 |
| 9 |  Itrust Consulting S. À R. L | 4 |
| 10 |  Rempart International | 1 |
| 11 |  Stowtech | 1 |
| 12 |  Linosec | 1 |
Showing 12 of 41 cybersecurity firms based in Luxembourg
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Cybersecurity firms based in Luxembourg at a glance
As of Aug 28, 2026Companies by employee count
Cybersecurity firms by metro
| Metro | Companies |
|---|---|
| Cybersecurity firms in Luxembourg | 17 |
| Cybersecurity firms in Esch-Sur-Alzette | 4 |
| Cybersecurity firms in Leudelange | 3 |
| Cybersecurity firms in Windhof | 1 |
| Cybersecurity firms in Flaxweiler Grevenmacher | 1 |
| Cybersecurity firms in Dalheim | 1 |
| Cybersecurity firms in Senningerberg | 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 firms”, 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 firms are there based in Luxembourg?
There are 41 cybersecurity firms headquartered in Luxembourg as of August 2026 (RevenueBase).
What is the largest company on this list?
Incert GIE, headquartered in Leudelange, tops this list with the largest team on record.
Which city has the most cybersecurity firms?
Luxembourg leads with 17 headquartered companies, followed by Esch-Sur-Alzette (4) 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 56 verified decision-maker contacts tracked across these 41 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.
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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.