Company lists · Data refreshed September 2026

Top 25 Cybersecurity startups based in Greece

RevenueBase identified 69 cybersecurity startups headquartered in Greece as of September 2026 and tracks 1,391 professional contacts across them, including 683 with verified work emails and 31 with mobile numbers. Athens is the largest hub.

This list covers cybersecurity startups 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 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review
69Companies
1,391Contacts tracked
683Verified emails
31Mobile numbers
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The 25 largest cybersecurity startups based in Greece

Ranked by team size
Top 25 of 69 cybersecurity startups based in Greece, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity startups: 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, Greece201-500311 contacts →

Indirect evidence

“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: RevenueBase Database · checked Sep 1, 2026
2Indirect evidenceAthens, Greece201-500242 contacts →

Indirect evidence

“Obrela Security Industries is a global provider of cyber security services.”

Source: RevenueBase Database · checked Sep 1, 2026
3Partial evidenceThermi Thessaloniki, Greece51-200184 contacts →

Partial evidence

“CENSUS is a cybersecurity engineering powerhouse.”

Source: RevenueBase Database · checked Sep 1, 2026
4Indirect evidenceThermi Thessaloniki, Greece51-200157 contacts →

Indirect 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 1, 2026
5Indirect evidenceAtene, Greece51-20081 contacts →

Indirect evidence

“Itway Cyber Security and Resiliency, parte del Gruppo Itway, supporta le organizzazioni nella protezione degli ambienti digitali e mission-critical, garantendo operatività sicura…”

Source: RevenueBase Database · checked Sep 1, 2026
6Indirect evidenceAthens, Greece51-20056 contacts →

Indirect evidence

“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: RevenueBase Database · checked Sep 1, 2026
7Indirect evidenceMetamorfosi, Greece11-5025 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 1, 2026
8Partial evidenceGreece11-5025 contacts →

Partial evidence

“K3Y has two major pillars, Cybersecurity Services & Research and Development.”

Source: RevenueBase Database · checked Sep 1, 2026
9Indirect evidenceKozani, Greece11-5021 contacts →

Indirect evidence

“Established in May 2021, MetaMind Innovations is the first spin-off of the University of Western Macedonia.”

Source: RevenueBase Database · checked Sep 1, 2026
10Partial evidenceAthens, Greece11-5020 contacts →

Partial 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 1, 2026
11Indirect evidenceGreece11-5019 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 1, 2026
12Partial evidenceGreece11-5017 contacts →

Partial evidence

“Alphabit is an expert Cybersecurity services provider.”

Source: RevenueBase Database · checked Sep 1, 2026
13Partial evidenceGreece11-5015 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 1, 2026
14Indirect evidenceGreece11-5012 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 1, 2026
15Partial evidenceAthens, Greece11-5012 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 1, 2026
16Indirect evidenceGreece11-5011 contacts →

Indirect evidence

“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: RevenueBase Database · checked Sep 1, 2026
17Indirect evidenceGreece11-507 contacts →

Indirect evidence

“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: RevenueBase Database · checked Sep 1, 2026
18Indirect evidenceAthens, Greece11-507 contacts →

Indirect 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 1, 2026
19Partial evidenceAthens, Greece11-507 contacts →

Partial evidence

“Cygnus Technologies is a leading Greece-based provider of managed IT Cybersecurity services for the shipping industry.”

Source: RevenueBase Database · checked Sep 1, 2026
20Indirect evidenceGreece1-107 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 1, 2026
21Indirect evidenceAthens, Greece1-107 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 1, 2026
22Indirect evidenceGreece11-506 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 1, 2026
23Partial evidenceGreece1-106 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 1, 2026
24Partial evidenceAthens, Greece1-106 contacts →

Partial evidence

“At HEADNET, we deliver advanced networking and cybersecurity solutions designed to meet your unique business needs.”

Source: RevenueBase Database · checked Sep 1, 2026
25Indirect evidenceAthens, Greece11-505 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 1, 2026

Showing 25 of 69 cybersecurity startups based in Greece

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Cybersecurity startups based in Greece at a glance

As of Sep 1, 2026
49.1%Verified-email coverage
2.2%Mobile-number coverage
20.2Average contacts per company
1-10Median size (employees)
40.6%Largest-city concentration · Athens
Sep 1, 2026Page data refreshed

Companies by employee count

1-10
38
11-50
22
51-200
7
201-500
2

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 startups, 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 “cybersecurity startups”. 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 cybersecurity startups), 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 cybersecurity startups, 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, 683 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 1, 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 startups by metro

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 cybersecurity startups, 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 cybersecurity startups are there based in Greece?

RevenueBase identified 69 cybersecurity startups 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?

Nviso Security, headquartered in Athens, tops this list with the largest team on record.

Which city has the most cybersecurity startups?

Athens leads with 28 headquartered companies, followed by Attica (2) and Thermi Thessaloniki (2).

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 683 verified decision-maker contacts tracked across these 69 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 1, 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.