Company lists · Data refreshed September 2026

Top 13 Intelligence and security consultants based in Greece

Name: Intelligence and security consultants based in Greece
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 30 companies tracked

RevenueBase identified 30 intelligence and security consultants headquartered in Greece as of September 2026 and tracks 547 professional contacts across them, including 197 with verified work emails and 9 with mobile numbers. Athens is the largest hub.

This list covers intelligence and security consultants 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 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 HQ checked on every row Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

30Companies

547Contacts tracked

197Verified emails

9Mobile numbers

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The 13 largest intelligence and security consultants based in Greece

Ranked by team size

Top 13 of 30 intelligence and security consultants based in Greece, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names intelligence and security consultants: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	ESA Security Solutions S.APartial evidence	Chalandri, GreeceHQ checked Sep 4, 2026	1,001-5,000	182
	“ESA Security Solutions is a leading security company in Greece.” Source: company website · checked Sep 4, 2026
2	AdacomPartial evidence	Athens, GreeceHQ checked Sep 4, 2026	51-200	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 Sep 4, 2026
3	Ifsas GroupPartial evidence	Kifissia, GreeceHQ checked Sep 4, 2026	51-200	66
	“IFSAS Group is a leading integrator of advanced Safety, Security & Homeland Security solutions, delivering end-to-end systems that protect people, assets, and critical operations.” Source: company website · checked Sep 4, 2026
4	DTI SolutionsIndirect evidence	GreeceHQ checked Sep 4, 2026	11-50	17
	“100+ years of combined experience.” Source: company website · checked Sep 4, 2026
5	Interstar SecurityPartial evidence	GreeceHQ checked Sep 4, 2026	51-200	16
	“Founded in 1988, INTERSTAR Security is offering a broad array of customized, high quality, integrated consulting and security services.” Source: company website · checked Sep 4, 2026
6	Vexillum Security ServicesPartial evidence	Piraeus, GreeceHQ checked Sep 4, 2026	11-50	11
	“Vexillum Security was established to provide consulting services in the field of security in companies, organizations and individuals.” Source: company website · checked Sep 4, 2026
7	Sigma Business NetworkIndirect evidence	GreeceHQ checked Sep 4, 2026	1-10	10
	“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: company website · checked Sep 4, 2026
8	Ovit P.CPartial evidence	Athens, GreeceHQ checked Sep 4, 2026	51-200	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 Sep 4, 2026
9	Snsfortech S.AIndirect evidence	Athens, GreeceHQ checked Sep 4, 2026	11-50	4
	Source: company website · checked Sep 4, 2026
10	Nisos AdvisorsPartial evidence	GreeceHQ checked Sep 4, 2026	11-50	2
	“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: company website · checked Sep 4, 2026
11	Alliance Security ConsultingPartial evidence	GreeceHQ checked Sep 4, 2026	1-10	2
	“Security Consulting” Source: company website · checked Sep 4, 2026
12	AntimetronIndirect evidence	GreeceHQ checked Sep 4, 2026	1-10	2
	“Guarantees the protection of your privacy.” Source: company website · checked Sep 4, 2026
13	ST Consultants Security Consulting ServicesPartial evidence	GreeceHQ checked Sep 4, 2026	1-10	1
	“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: company website · checked Sep 4, 2026

Showing 13 of 30 intelligence and security consultants based in Greece

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Intelligence and security consultants based in Greece at a glance

As of Sep 4, 2026

1-10Median size (employees)

AthensLargest hub · 6 HQs

9Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

1,001-5,000

Verified emails by last verification

0–30

31–60

61–90

109

90–180

180+

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 intelligence and security consultants, 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 “intelligence and security consultants”. 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 intelligence and security consultants, 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, 197 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 4, 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

How many intelligence and security consultants are there based in Greece?

RevenueBase identified 30 intelligence and security consultants 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?

ESA Security Solutions S.A, headquartered in Chalandri, tops this list with the largest team on record.

Which city has the most intelligence and security consultants?

Athens leads with 6 headquartered companies, followed by Chalandri (1) and Greece (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 197 verified decision-maker contacts tracked across these 30 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 4, 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.