Company lists · Data verified August 2026

Top 25 Cybersecurity defense companies based in Czechia

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 65 companies tracked

There are 65 cybersecurity defense companies headquartered in Czechia (RevenueBase, August 2026). RevenueBase tracks 716 professional contacts across them, including 387 with verified work emails and 22 with mobile numbers. Prague is the largest hub.

This list covers cybersecurity defense 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.

65Companies

716Contacts tracked

387Verified emails

22Mobile numbers

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The 25 largest cybersecurity defense companies based in Czechia

Ranked by team size

Top 25 of 65 cybersecurity defense companies based in Czechia, 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	Whalebone	Brno	51-200	168	110
2	Secureops	Sokolovska	51-200	108	47
3	Corpus Solutions A.S	Praha	51-200	69	53
4	Greycortex	Brno	11-50	51	38
5	Integra Emea	Brno	51-200	51	30
6	Compunet S.R.O	n/a	11-50	28	20
7	Freedivision	n/a	11-50	13	8
8	Axelum	Prague	11-50	13	7
9	Patron-It	Brno	11-50	11	9
10	Trusted Network Solutions	Brno	11-50	11	6
11	Exterra Services S.R.O	n/a	1-10	9	5
12	Sec4good	Prague	1-10	7	5
13	Ict-Group	Prague	11-50	7	4
14	Aceproit	Prague	1-10	6	5
15	Blue Partners S.R.O	n/a	11-50	5	5
16	Insighti	Praha	11-50	5	4
17	Sonpo, A.S	n/a	1-10	4	4
18	Asecpro S.R.O	Prague	1-10	4	2
19	Sodat Technologies A.S	Praha	11-50	4	1
20	Ares Cyber Defense	Prague	1-10	3	3
21	Securu	Prague	11-50	3	2
22	Cyber Security Tech	n/a	11-50	3	1
23	Blindspot Technologies	Prague	11-50	3	1
24	Zymestic Solutions A.S	Prague	51-200	2	2
25	ELLIO	Prague	1-10	2	2

Showing 25 of 65 cybersecurity defense companies based in Czechia

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Cybersecurity defense companies based in Czechia at a glance

As of Aug 28, 2026

1-10Median size (employees)

PragueLargest hub · 29 HQs

22Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

1,001-5,000

Cybersecurity defense companies by metro

Metro	Companies
Cybersecurity defense companies in Prague	29
Cybersecurity defense companies in Praha	10
Cybersecurity defense companies in Brno	7
Cybersecurity defense companies in Liberec	2
Cybersecurity defense companies in Teplice	1
Cybersecurity defense companies in Ceska Lipa	1
Cybersecurity defense 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 defense 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 defense companies are there based in Czechia?

There are 65 cybersecurity defense companies headquartered in Czechia as of August 2026 (RevenueBase).

What is the largest company on this list?

Whalebone, headquartered in Brno, tops this list with the largest team on record.

Which city has the most cybersecurity defense companies?

Prague leads with 29 headquartered companies, followed by Praha (10) and Brno (7).

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 387 verified decision-maker contacts tracked across these 65 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.