Company lists · Data refreshed September 2026

Top 25 Information security consulting services based in Greece

Name: Information security consulting services based in Greece
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 116 companies tracked

RevenueBase identified 116 information security consulting services headquartered in Greece as of September 2026 and tracks 1,081 professional contacts across them, including 423 with verified work emails. Athens is the largest hub.

This list covers information security consulting services 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 28, 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 28, 2026 86% judged on-target in blind review

116Companies

1,081Contacts tracked

423Verified emails

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The 25 largest information security consulting services based in Greece

Ranked by team size

Top 25 of 116 information security consulting services based in Greece, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to information security consulting services: 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Census	Indirect evidence	Athens, GreeceHQ checked Sep 28, 2026	51-200	194 contacts →
	Indirect evidence “CENSUS is a cybersecurity engineering powerhouse.” Source: RevenueBase Database · checked Sep 28, 2026
2	Adacom	Partial evidence	Athens, GreeceHQ checked Sep 28, 2026	51-200	159 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 28, 2026
3	Bewise	Indirect evidence	Chalandri, GreeceHQ checked Sep 28, 2026	51-200	92 contacts →
	Indirect evidence “BEWISE is an established team of dedicated IT professionals combining years of technical and business experience.” Source: RevenueBase Database · checked Sep 28, 2026
4	Systecom S.A	Indirect evidence	Metamorfosi, GreeceHQ checked Sep 28, 2026	11-50	25 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 28, 2026
5	Twelvesec	Strong evidence	Chalandri, GreeceHQ checked Sep 28, 2026	11-50	20 contacts →
	Strong evidence “With constant integration of technology in every aspect of an organisation, information security is something that everyone needs.” Source: RevenueBase Database · checked Sep 28, 2026
6	Threatscene	Indirect evidence	Athens, GreeceHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 28, 2026
7	Brains ICS	Strong evidence	Athens, GreeceHQ checked Sep 28, 2026	11-50	19 contacts →
	Strong evidence “BRAINS Innovative Consulting Services is active in the provision of specialized Consulting and Development Services, with particular expertise in the broader Health & Security…” Source: RevenueBase Database · checked Sep 28, 2026
8	Define Solutions S.A	Indirect evidence	Athens, GreeceHQ checked Sep 28, 2026	11-50	19 contacts →
	Indirect evidence “At Define Solutions, we put your business needs and goals first, in order to deliver tailored solutions that drive growth and streamline operations.” Source: RevenueBase Database · checked Sep 28, 2026
9	DTI Solutions	Indirect evidence	Athens, GreeceHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “100+ years of combined experience.” Source: RevenueBase Database · checked Sep 28, 2026
10	Interstar Security	Strong evidence	Metamorfosi, GreeceHQ checked Sep 28, 2026	51-200	17 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 28, 2026
11	Alphabit Cybersecurity	Indirect evidence	Khalándrion, GreeceHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “Alphabit is an expert Cybersecurity services provider.” Source: RevenueBase Database · checked Sep 28, 2026
12	Besecure	Partial evidence	Athens, GreeceHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “We are a leading provider of Governance, Risk & Compliance (GRC) services, Cyber Security solutions, Managed Security services, Certification Training and Awareness programs…” Source: RevenueBase Database · checked Sep 28, 2026
13	Xgate Solutions	Indirect evidence	Kallithéa, GreeceHQ checked Sep 28, 2026	11-50	13 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 28, 2026
14	Cyber Noesis	Partial evidence	Agios Dimitrios, GreeceHQ checked Sep 28, 2026	11-50	12 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 28, 2026
15	Geniusnet SA	Partial evidence	Chalandri Athens, GreeceHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “GeniusNet SA is a High tech Cybersecurity and Smart security Company specialized on Supporting your business!” Source: RevenueBase Database · checked Sep 28, 2026
16	Cyberflip	Indirect evidence	Athens, GreeceHQ checked Sep 28, 2026	1-10	11 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
17	Vexillum Security Services	Strong evidence	Piraeus, GreeceHQ checked Sep 28, 2026	11-50	11 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 28, 2026
18	Gdpr Greece	Indirect evidence	Αγία Παρασκευή, GreeceHQ checked Sep 28, 2026	11-50	10 contacts →
	Indirect evidence “H GDPR Greece ιδρύθηκε από δύο ανθρώπους που έχουν ταυτιστεί στην Ελλάδα με την ασφάλεια πληροφοριακών συστημάτων και το ηλεκτρονικό έγκλημα.” Source: RevenueBase Database · checked Sep 28, 2026
19	Sigma Business Network	Partial evidence	Agios Stefanos, GreeceHQ checked Sep 28, 2026	1-10	10 contacts →
	Partial 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 28, 2026
20	Akéreon Business & IT Consulting	Partial evidence	Glyfada, GreeceHQ checked Sep 28, 2026	1-10	10 contacts →
	Partial evidence “akereon is a business services company specializing in Information Technology, focused on helping organizations leverage IT to achieve measurable business results.” Source: RevenueBase Database · checked Sep 28, 2026
21	ICT Protect	Strong evidence	Amaroúsion, GreeceHQ checked Sep 28, 2026	1-10	7 contacts →
	Strong evidence “ICT PROTECT is an information security firm, specialising in Security Management and Security Training services.” Source: RevenueBase Database · checked Sep 28, 2026
22	Ovit P.C	Partial evidence	Athens, GreeceHQ checked Sep 28, 2026	51-200	7 contacts →
	Partial evidence “Our mission statement illustrates our company culture: Ovit personnel provide Superior Security Services tailored specifically to the requirements of each individual or client's…” Source: RevenueBase Database · checked Sep 28, 2026
23	TÜV Austria Trust IT GR	Strong evidence	Athens, GreeceHQ checked Sep 28, 2026	11-50	7 contacts →
	Strong evidence “Established in 2024, TÜV AUSTRIA Trust IT stands as a subsidiary of TÜV AUSTRIA, specializing in comprehensive information security and IT-related services.” Source: RevenueBase Database · checked Sep 28, 2026
24	Itacc Solutions	Indirect evidence	Khalándrion, GreeceHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 28, 2026
25	Trust-It Security Intelligence	Strong evidence	Cholargos - Athens, GreeceHQ checked Sep 28, 2026	11-50	7 contacts →
	Strong 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 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: information security consulting services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names information security consulting services.
Partial evidence: Its own public description names part of information security consulting services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name information security consulting services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 116 information security consulting services based in Greece

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Information security consulting services based in Greece at a glance

As of Sep 28, 2026

39.1%Verified-email coverage

9.3Average contacts per company

1-10Median size (employees)

32.8%Largest-city concentration · Athens

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

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 116 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 information security consulting services, 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 “information security consulting services”. 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 information security consulting services), 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 information security consulting services, 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, 423 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 28, 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.

Information security consulting services by metro

Information security consulting services in Athens38

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 information security consulting services, 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 information security consulting services are there based in Greece?

RevenueBase identified 116 information security consulting services 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 information security consulting services?

Athens leads with 38 headquartered companies, followed by Thessaloniki (5) and Piraeus (4).

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 423 verified decision-maker contacts tracked across these 116 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 28, 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.