Company lists · Data refreshed September 2026

Top 24 Security risk consulting firms based in Greece

RevenueBase identified 57 security risk consulting firms headquartered in Greece as of September 2026 and tracks 659 professional contacts across them, including 253 with verified work emails. Athens is the largest hub.

This list covers security risk consulting firms headquartered in Greece, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review
57Companies
659Contacts tracked
253Verified emails
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The 24 largest security risk consulting firms based in Greece

Ranked by team size
Top 24 of 57 security risk consulting firms based in Greece, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to security risk consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceAthens, GreeceHQ checked Sep 21, 202651-200194 contacts →

Indirect evidence

“CENSUS is a cybersecurity engineering powerhouse.”

Source: RevenueBase Database · checked Sep 21, 2026
2Partial evidenceAthens, GreeceHQ checked Sep 21, 202651-200159 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
3Partial evidenceChalandri, GreeceHQ checked Sep 21, 202611-5020 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
4Indirect evidenceAthens, GreeceHQ checked Sep 21, 202611-5017 contacts →

Indirect evidence

“100+ years of combined experience.”

Source: RevenueBase Database · checked Sep 21, 2026
5Strong evidenceMetamorfosi, GreeceHQ checked Sep 21, 202651-20017 contacts →

Strong evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
6Indirect evidenceKhalándrion, GreeceHQ checked Sep 21, 202611-5017 contacts →

Indirect evidence

“Alphabit is an expert Cybersecurity services provider.”

Source: RevenueBase Database · checked Sep 21, 2026
7Strong evidenceThessaloniki, GreeceHQ checked Sep 21, 20261,001-5,00017 contacts →

Strong evidence

“We offer service as: Cri­sis Man­age­ment Risk Assess­ment Guardin Services Manned Security Services Electronic Security Systems Incident Management Station Armored lux­ury cars…”

Source: RevenueBase Database · checked Sep 21, 2026
8Strong evidenceAthens, GreeceHQ checked Sep 21, 202611-5015 contacts →

Strong evidence

“Reduce cybersecurity risk proactively by identifying security gaps and vulnerabilities before they can be exploited by malicious actors.”

Source: RevenueBase Database · checked Sep 21, 2026
9Indirect evidenceKallithéa, GreeceHQ checked Sep 21, 202611-5013 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
10Partial evidenceAgios Dimitrios, GreeceHQ checked Sep 21, 202611-5012 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
11Strong evidencePiraeus, GreeceHQ checked Sep 21, 202611-5011 contacts →

Strong evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
12Strong evidenceAgios Stefanos, GreeceHQ checked Sep 21, 20261-1010 contacts →

Strong evidence

“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 &…”

Source: RevenueBase Database · checked Sep 21, 2026
13Partial evidenceCholargos - Athens, GreeceHQ checked Sep 21, 202611-507 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
14Indirect evidenceNea Smyrni, GreeceHQ checked Sep 21, 20261-107 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
15Partial evidenceAthens, GreeceHQ checked Sep 21, 202611-506 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
16Partial evidenceAthens, GreeceHQ checked Sep 21, 202611-505 contacts →

Partial evidence

“Started in is now one of the leading companies in managed security services.”

Source: RevenueBase Database · checked Sep 21, 2026
17Partial evidenceChalandri, GreeceHQ checked Sep 21, 20261-104 contacts →

Partial evidence

“At CyberOne we select and integrate the most advanced IT security solutions to address the evolving needs of corporate customers who must protect their information repositories…”

Source: RevenueBase Database · checked Sep 21, 2026
18Indirect evidenceChalandri, GreeceHQ checked Sep 21, 202611-504 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 21, 2026
19Indirect evidencePireas, GreeceHQ checked Sep 21, 20261-104 contacts →

Indirect evidence

“f society was founded in 2017 in Greece during the economic crisis, breaking the brain drain rule.”

Source: RevenueBase Database · checked Sep 21, 2026
20Indirect evidenceChalandri, GreeceHQ checked Sep 21, 20261-102 contacts →

Indirect evidence

“Guarantees the protection of your privacy.”

Source: RevenueBase Database · checked Sep 21, 2026
21Partial evidenceAthens, GreeceHQ checked Sep 21, 20261-102 contacts →

Partial evidence

“We are a cyber security firm based in Greece operating in the EMEA region.”

Source: RevenueBase Database · checked Sep 21, 2026
22Indirect evidenceAmaroúsion, GreeceHQ checked Sep 21, 202611-502 contacts →

Indirect evidence

“Nisos Advisors was established in 2017 by a team of partners with extensive field experience each with over twenty years of line management and consultancy practice.”

Source: RevenueBase Database · checked Sep 21, 2026
23Strong evidenceKifisia, GreeceHQ checked Sep 21, 20261-102 contacts →

Strong evidence

Security Consulting

Source: RevenueBase Database · checked Sep 21, 2026
24Indirect evidenceThessaloniki, GreeceHQ checked Sep 21, 20261-101 contacts →

Indirect evidence

“At ST Consultant our mission is to empower our clients with the knowledge, strategies, and technologies needed to protect their assets, people, and information.”

Source: RevenueBase Database · checked Sep 21, 2026

Showing 24 of 57 security risk consulting firms based in Greece

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Security risk consulting firms based in Greece at a glance

As of Sep 21, 2026
38.4%Verified-email coverage
11.6Average contacts per company
1-10Median size (employees)
33.3%Largest-city concentration · Athens
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
29
11-50
22
51-200
4
501-1,000
1
1,001-5,000
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 57 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among security risk consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Greece whose own description of what they do matches “security risk consulting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names security risk consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among security risk consulting firms, and records with no verified work email. Companies headquartered outside Greece are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 253 across the full list. 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.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names security risk consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many security risk consulting firms are there based in Greece?

RevenueBase identified 57 security risk consulting firms headquartered in Greece as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Census, headquartered in Greece, tops this list with the largest team on record.

Which city has the most security risk consulting firms?

Athens leads with 19 headquartered companies, followed by Piraeus (2) and Attica (1).

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 253 verified decision-maker contacts tracked across these 57 companies.

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 Smart Search, 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.