Company lists · Data verified August 2026

Top 25 Cybersecurity companies in Czechia

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 129 companies tracked

Our directory lists 129 cybersecurity companies in Czechia, with 1,878 professional contacts and 934 email addresses. The list was last updated in August 2026, and Prague 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.

129Companies

1,878Contacts tracked

934Verified emails

67Mobile numbers

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The 25 largest cybersecurity companies in Czechia

Ranked by team size

Top 25 of 129 cybersecurity companies 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	AVAST	n/a	1,001-5,000	627	290
2	Whalebone	Brno	51-200	168	110
3	Secureops	Sokolovska	51-200	108	47
4	Eset Česká Republika	Praha	51-200	102	71
5	Corpus Solutions A.S	Praha	51-200	69	53
6	Greycortex	Brno	11-50	51	38
7	Integra Emea	Brno	51-200	51	30
8	Exclusive Networks Czechia	n/a	11-50	41	25
9	Next Generation Security Solutions	n/a	11-50	35	20
10	Compunet S.R.O	n/a	11-50	28	20
11	Csirt-Mu	n/a	11-50	27	2
12	Noibit	Praha	11-50	24	19
13	Goodaccess	Usti Nad Labem	11-50	23	14
14	Teskalabs	n/a	11-50	20	15
15	Talsec	Brno	11-50	19	15
16	ISECO	Prague	11-50	17	7
17	Mycom Solutions, S.R.O	n/a	11-50	14	10
18	Offensive Security Manager	Prague	11-50	14	1
19	Alphaserver	Prague	11-50	13	10
20	Freedivision	n/a	11-50	13	8
21	Axelum	Prague	11-50	13	7
22	Patron-It	Brno	11-50	11	9
23	Trusted Network Solutions	Brno	11-50	11	6
24	Validato	Prague	11-50	9	4
25	XEEK	n/a	11-50	8	4
26	Ict-Group	Prague	11-50	7	4
27	Blue Partners S.R.O	n/a	11-50	5	5
28	Insighti	Praha	11-50	5	4

Showing 25 of 129 cybersecurity companies in Czechia

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Cybersecurity companies in Czechia at a glance

As of Aug 28, 2026

1-10Median size (employees)

PragueLargest hub · 50 HQs

67Contacts with mobile numbers

26Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

1,001-5,000

Companies by metro

Metro	Companies
Cybersecurity companies in Prague	50
Cybersecurity companies in Praha	22
Cybersecurity companies in Brno	13
Cybersecurity companies in Liberec	2
Cybersecurity companies in Teplice	1
Cybersecurity companies in Jablonec Nad Nisou	1
Cybersecurity companies in Moravia	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 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; 26 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 129 cybersecurity companies in Czechia.

Which city has the most cybersecurity companies?

Prague is the single most-represented city among the cybersecurity companies on the list.

How many contacts are available for cybersecurity companies?

The directory includes 1,878 professional contacts and 934 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.