Company lists · Data refreshed August 2026
Top 25 Cybersecurity companies based in Greece
Our directory lists 103 cybersecurity companies based 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 29, 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.
The 25 largest cybersecurity companies based in Greece
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 311 | ||||
“NVISO is a cyber security services firm composed of outstanding security professionals - each has a specific field of expertise, ranging from security research and risk management…” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 242 | ||||
“Obrela Security Industries is a global provider of cyber security services.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 184 | ||||
“CENSUS is a cybersecurity engineering powerhouse.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 157 | ||||
“ADACOM, a Byte subsidiary, enables security online for Financial Institutions, Telecom Operators, Governments and Large Organizations, in more than 30 countries in EMEA.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 81 | ||||
“Itway Cyber Security and Resiliency, parte del Gruppo Itway, supporta le organizzazioni nella protezione degli ambienti digitali e mission-critical, garantendo operatività sicura…” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 56 | ||||
“CyberOwl helps asset operators in the maritime and critical national infrastructure sectors gain visibility, cyber security and cyber compliance of systems on their distributed…” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 25 | ||||
“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: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 25 | ||||
“K3Y has two major pillars, Cybersecurity Services & Research and Development.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 23 | ||||
“CyberScope is a leading blockchain security company, providing end-to-end protection for Web3 projects.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 21 | ||||
“Established in May 2021, MetaMind Innovations is the first spin-off of the University of Western Macedonia.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 20 | ||||
“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: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 19 | ||||
“With constant integration of technology in every aspect of an organisation, information security is something that everyone needs.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 17 | ||||
“Alphabit is an expert Cybersecurity services provider.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 15 | ||||
“Reduce cybersecurity risk proactively by identifying security gaps and vulnerabilities before they can be exploited by malicious actors.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 13 | ||||
“Η XGate προσφέρει ένα σύνολο υπηρεσιών ολιστικού ελέγχου ασφάλειας πληροφοριακών συστημάτων, που δεν στηρίζεται μόνο σε έτοιμα, γνωστά, αυτοματοποιημένα μοντέλα, αλλά κυρίως σε…” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 12 | ||||
“CyberNoesis was established in 2015 by cyber security specialists with extensive experience in enterprise, industrial and telecommunications sectors.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 12 | ||||
“GeniusNet SA is a High tech Cybersecurity and Smart security Company specialized on Supporting your business!” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 11 | ||||
“Mind The Hack is an EU-built cyber exposure platform that helps organizations continuously identify, validate and prioritize real cyber risk across their internal and external…” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 11 | ||||
“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: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 10 | ||||
“MTG Hellas is the subsidiary of MTG AG in Greece.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 9 | ||||
“Accessit is a dynamically developing company that provides integrated solutions in the field of Internet.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 7 | ||||
“A cyber security company that offers bespoke, impact-centric services through envisioning, designing, crafting and providing critical Cyber Security Solutions and advanced A.I.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 7 | ||||
“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: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 7 | ||||
“Established in 2024, TÜV AUSTRIA Trust IT stands as a subsidiary of TÜV AUSTRIA, specializing in comprehensive information security and IT-related services.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 7 | ||||
“Safeguarding the future of energy with cybersecurity & reliability intelligent solutions for critical infrastructure.” Source: company website · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 103 cybersecurity companies based in Greece
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Cybersecurity companies based in Greece at a glance
As of Aug 29, 2026Companies by employee count
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 cybersecurity companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Greece whose own description of what they do matches “cybersecurity companies”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among cybersecurity companies, 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 an evidence 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, 729 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 August 29, 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.
Cybersecurity companies by metro
Frequently asked
How many cybersecurity companies are in the directory?
The directory lists 103 cybersecurity companies based 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 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.
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