Company lists · Data refreshed September 2026

Top 25 Information security consulting companies based in Greece

RevenueBase identified 87 company matches for information security consulting companies associated with Greece as of September 2026 and tracks 851 professional contacts across them, including 320 with verified work emails. Athens is the largest hub.

This list covers company matches for information security consulting companies associated with Greece, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built
87Companies
851Contacts tracked
320Verified emails
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The 25 largest information security consulting companies based in Greece

Ranked by team size
Top 25 of 87 company matches for information security consulting companies based in Greece, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchAthens, GreeceHQ recorded Sep 21, 202651-200194 contacts →

Exact match

“CENSUS is a cybersecurity engineering powerhouse.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchAthens, GreeceHQ recorded Sep 21, 202651-200159 contacts →

Exact match

“ADACOM, a Byte subsidiary, enables security online for Financial Institutions, Telecom Operators, Governments and Large Organizations, in more than 30 countries in EMEA.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchMetamorfosi, GreeceHQ recorded Sep 21, 202611-5025 contacts →

Exact match

“Our company's structure is based on a modern and flexible model ensuring adaptation in running developments but also in continuous requirements and needs of our clients.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchChalandri, GreeceHQ recorded Sep 21, 202611-5020 contacts →

Exact match

“With constant integration of technology in every aspect of an organisation, information security is something that everyone needs.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchAthens, GreeceHQ recorded Sep 21, 202611-5020 contacts →

Exact match

“At ThreatScene, we are committed to setting new standards in cybersecurity by delivering exceptional, high-quality services designed to protect your most valuable digital assets.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchAthens, GreeceHQ recorded Sep 21, 202611-5017 contacts →

Exact match

“100+ years of combined experience.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchMetamorfosi, GreeceHQ recorded Sep 21, 202651-20017 contacts →

Exact match

“Founded in 1988, INTERSTAR Security is offering a broad array of customized, high quality, integrated consulting and security services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchKhalándrion, GreeceHQ recorded Sep 21, 202611-5017 contacts →

Exact match

“Alphabit is an expert Cybersecurity services provider.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchKallithéa, GreeceHQ recorded Sep 21, 202611-5013 contacts →

Exact match

“Η XGate προσφέρει ένα σύνολο υπηρεσιών ολιστικού ελέγχου ασφάλειας πληροφοριακών συστημάτων, που δεν στηρίζεται μόνο σε έτοιμα, γνωστά, αυτοματοποιημένα μοντέλα, αλλά κυρίως σε…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchAgios Dimitrios, GreeceHQ recorded Sep 21, 202611-5012 contacts →

Exact match

“CyberNoesis was established in 2015 by cyber security specialists with extensive experience in enterprise, industrial and telecommunications sectors.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchChalandri Athens, GreeceHQ recorded Sep 21, 202611-5012 contacts →

Exact match

“GeniusNet SA is a High tech Cybersecurity and Smart security Company specialized on Supporting your business!”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchAthens, GreeceHQ recorded Sep 21, 20261-1011 contacts →

Exact match

“We are here to jointly understand and address in practice how Cybersecurity can be a business enabler- Providing Cybersecurity services, industry-specific, vendor neutral and…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchPiraeus, GreeceHQ recorded Sep 21, 202611-5011 contacts →

Exact match

“Vexillum Security was established to provide consulting services in the field of security in companies, organizations and individuals.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchΑγία Παρασκευή, GreeceHQ recorded Sep 21, 202611-5010 contacts →

Exact match

“H GDPR Greece ιδρύθηκε από δύο ανθρώπους που έχουν ταυτιστεί στην Ελλάδα με την ασφάλεια πληροφοριακών συστημάτων και το ηλεκτρονικό έγκλημα.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchAgios Stefanos, GreeceHQ recorded Sep 21, 20261-1010 contacts →

Exact match

“Sigma Business Network provides its customers with high-level, fully customized Consulting Services and Integrated Programs to assist them in the critical areas of- Risk &…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchAthens, GreeceHQ recorded Sep 21, 202611-508 contacts →

Exact match

“Accessit is a dynamically developing company that provides integrated solutions in the field of Internet.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchAmaroúsion, GreeceHQ recorded Sep 21, 20261-107 contacts →

Exact match

“ICT PROTECT is an information security firm, specialising in Security Management and Security Training services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchAthens, GreeceHQ recorded Sep 21, 202611-507 contacts →

Exact match

“Established in 2024, TÜV AUSTRIA Trust IT stands as a subsidiary of TÜV AUSTRIA, specializing in comprehensive information security and IT-related services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchKhalándrion, GreeceHQ recorded Sep 21, 202611-507 contacts →

Exact match

“ITACC Solutions empowers people and organizations to grow in the digital era in a productive, reliable, and secure way, and maximize their return on investment.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchCholargos - Athens, GreeceHQ recorded Sep 21, 202611-507 contacts →

Exact match

“Trust-IT (Trust Information Technologies) is an Enterprise Security Provider & IT Solutions Company, which leverages the sector of IT Security Intelligence in conjunction with…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchNea Smyrni, GreeceHQ recorded Sep 21, 20261-107 contacts →

Exact match

“Η Cysoft Σύμβουλοι Πληροφορικής ΕΠΕ ιδρύθηκε το 1998 για να διαθέσει στην Ελληνική Αγορά επιλεγμένα προϊόντα και λύσεις ασφάλειας πληροφορικής.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchΘεσσαλονίκη, GreeceHQ recorded Sep 21, 20261-107 contacts →

Exact match

“InnoSec is a spin-off company, involved in state-of-the-art research in the field of information security.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchKoropi, GreeceHQ recorded Sep 21, 202611-506 contacts →

Exact match

“Logisek is a leading Cyber Security and IT services firm, founded in Greece in 2008 and expanded to Romania in 2019.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchGreeceHQ recorded Sep 21, 20261-106 contacts →

Exact match

“PeS Cybersecurity, your trusted partner in safeguarding your digital domain, born from the dynamic collaboration between two industry leaders, Pylones Hellas, and eSafe, brings…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchAthens, GreeceHQ recorded Sep 21, 202611-506 contacts →

Exact match

“Ιn2solution is an advanced security solutions company based in Athens.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 87 information security consulting companies based in Greece

See the full list, filter by size, metro and specialty, and access 320 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Information security consulting companies based in Greece at a glance

As of Sep 21, 2026
37.6%Verified-email coverage
9.8Average contacts per company
1-10Median size (employees)
35.6%Largest-city concentration · Athens
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
54
11-50
27
51-200
5
501-1,000
1

Email recency for this list is measured worldwide rather than for Greece, so it is reported there. Company counts and contact totals on this page are exact for Greece, over 87 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Greece whose business descriptions match “information security consulting companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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
Every displayed company carries at least one verified work email. RevenueBase tracks 320 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Information security consulting companies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “information security consulting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many information security consulting companies are there based in Greece?

RevenueBase identified 87 company matches for information security consulting companies associated with Greece as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Census tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most information security consulting companies?

Athens leads with 31 company records, followed by Thessaloniki (3) and Attica (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 320 professional contacts with verified work emails tracked across these 87 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.