Company lists · Data verified August 2026

Top 25 Cybersecurity companies in Greece

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 103 companies tracked

Our directory lists 103 cybersecurity companies in Greece, with 1,574 professional contacts and 729 email addresses. The list was last updated in August 2026, and Athens 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.

103Companies

1,574Contacts tracked

729Verified emails

35Mobile numbers

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The 25 largest cybersecurity companies in Greece

Ranked by team size

Top 25 of 103 cybersecurity companies in Greece, 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	Nviso Security	Athens	201-500	311	205
2	Obrela	Athens	201-500	242	146
3	Census	Thermi Thessaloniki	51-200	184	46
4	Adacom	Thermi Thessaloniki	51-200	157	91
5	Itway Cyber Security And Resiliency	Atene	51-200	81	23
6	Cyberowl	Athens	51-200	56	34
7	Systecom S.A	Metamorfosi	11-50	25	14
8	K3y	n/a	11-50	25	4
9	Cyberscope, A TAC Security Company	Athens	11-50	23	7
10	Metamind Innovations - Minds	Kozani	11-50	21	13
11	Threatscene	Athens	11-50	20	11
12	Twelvesec	n/a	11-50	19	15
13	Alphabit Cybersecurity	n/a	11-50	17	2
14	Cenobe Cybersecurity	n/a	11-50	15	8
15	Xgate Solutions	n/a	11-50	13	8
16	Cyber Noesis	n/a	11-50	12	11
17	Geniusnet SA	Athens	11-50	12	8
18	Mind The Hack	n/a	11-50	11	8
19	Cyberflip	Athens	1-10	11	7
20	MTG Hellas	n/a	11-50	10	7
21	Accessit LTD	Athens	11-50	9	2
22	Memorandum	n/a	11-50	7	5
23	Ovit P.C	Athens	51-200	7	4
24	TÜV Austria Trust IT GR	Athens	11-50	7	4
25	Plugsecure	Athens	1-10	7	4
26	Cygnus Technologies	Athens	11-50	7	1
27	Cysoft LTD	Athens	1-10	7	1
28	Innosec	n/a	1-10	7	1

Showing 25 of 103 cybersecurity companies in Greece

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Cybersecurity companies in Greece at a glance

As of Aug 28, 2026

1-10Median size (employees)

AthensLargest hub · 44 HQs

35Contacts with mobile numbers

4Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Companies by metro

Metro	Companies
Cybersecurity companies in Athens	44
Cybersecurity companies in Thessaloniki	4
Cybersecurity companies in Attica	2
Cybersecurity companies in Thermi Thessaloniki	2
Cybersecurity companies in Heraklion	2
Cybersecurity companies in Kallithea	2
Cybersecurity companies in Salonica	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 Greece.
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; 4 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 103 cybersecurity companies in Greece.

Which city has the most cybersecurity companies?

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

How many contacts are available for cybersecurity companies?

The directory includes 1,574 professional contacts and 729 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.