Company lists · Data verified August 2026
Top 9 Cybersecurity companies in Luxembourg
Our directory lists 40 cybersecurity companies in Luxembourg, with 249 professional contacts and 69 email addresses. The list was last updated in August 2026, and Luxembourg is the single most-represented city among the companies listed.
Cybersecurity companies provide products and services that protect systems, networks, applications, devices, and data from unauthorized access, disruption, or misuse. This list covers companies that provide cybersecurity products, services, consulting, assessments, monitoring, incident response, or related protection for digital systems and data. Ranked by team size, largest first. Data current as of August 28, 2026.
The 9 largest cybersecurity companies in Luxembourg
Ranked by team size| # | Company | Verified emails |
|---|---|---|
| 1 |  Incert GIE | 26 |
| 2 |  Dartalis | 15 |
| 3 |  Rcdevs Security | 3 |
| 4 |  F3c-Systems | 6 |
| 5 |  Eset Belux | 1 |
| 6 |  Adronh | 1 |
| 7 |  Snowball Technology | 6 |
| 8 |  Cubic Consulting Sarl | 4 |
| 9 | Excellium Services | 1 |
| 10 |  Itrust Consulting S. À R. L | 4 |
| 11 |  Stowtech | 1 |
| 12 |  Linosec | 1 |
Showing 9 of 40 cybersecurity companies in Luxembourg
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Cybersecurity companies in Luxembourg at a glance
As of Aug 28, 2026Companies by employee count
Companies by metro
| Metro | Companies |
|---|---|
| Cybersecurity companies in Luxembourg | 18 |
| Cybersecurity companies in Esch-Sur-Alzette | 5 |
| Cybersecurity companies in Leudelange | 3 |
| Cybersecurity companies in Windhof | 1 |
| Cybersecurity companies in Flaxweiler Grevenmacher | 1 |
| Cybersecurity companies in Senningerberg | 1 |
| Cybersecurity companies 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 companies”, 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; 3 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 companies are in the directory?
The directory lists 40 cybersecurity companies in Luxembourg.
Which city has the most cybersecurity companies?
Luxembourg is the single most-represented city among the cybersecurity companies on the list.
How many contacts are available for cybersecurity companies?
The directory includes 249 professional contacts and 69 email addresses for the listed cybersecurity companies.
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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.