Company lists · Data verified August 2026
Top 11 Cybersecurity threat detection companies based in Czechia
There are 25 cybersecurity threat detection companies headquartered in Czechia (RevenueBase, August 2026). RevenueBase tracks 202 professional contacts across them, including 82 with verified work emails and 4 with mobile numbers. Prague is the largest hub.
This list covers cybersecurity threat detection companies headquartered in Czechia, 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 11 largest cybersecurity threat detection companies based in Czechia
Ranked by team size| # | Company | Verified emails |
|---|---|---|
| 1 |  Greycortex | 38 |
| 2 |  Teskalabs | 15 |
| 3 |  ISECO | 7 |
| 4 |  Freedivision | 8 |
| 5 |  Insighti | 4 |
| 6 |  Sonpo, A.S | 4 |
| 7 |  Sodat Technologies A.S | 1 |
| 8 |  Blindspot Technologies | 1 |
| 9 |  ELLIO | 2 |
| 10 |  Pg-Sec S.R.O | 1 |
| 11 |  Cyberyg | 1 |
Showing 11 of 25 cybersecurity threat detection companies based in Czechia
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Cybersecurity threat detection companies based in Czechia at a glance
As of Aug 28, 2026Companies by employee count
Cybersecurity threat detection companies by metro
| Metro | Companies |
|---|---|
| Cybersecurity threat detection companies in Prague | 7 |
| Cybersecurity threat detection companies in Praha | 7 |
| Cybersecurity threat detection companies in Brno | 3 |
| Cybersecurity threat detection companies in Jablonec Nad Nisou | 1 |
| Cybersecurity threat detection companies in Nusle | 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 threat detection companies”, with match quality audited by blind human judging, and headquartered in Czechia.
- 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 threat detection companies are there based in Czechia?
There are 25 cybersecurity threat detection companies headquartered in Czechia as of August 2026 (RevenueBase).
What is the largest company on this list?
Greycortex, headquartered in Brno, tops this list with the largest team on record.
Which city has the most cybersecurity threat detection companies?
Prague leads with 7 headquartered companies, followed by Praha (7) and Brno (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 82 verified decision-maker contacts tracked across these 25 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.
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