Company lists · Data refreshed September 2026

Top 25 IT security companies based in France

Name: IT security companies based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 696 companies tracked

RevenueBase identified 696 IT security companies headquartered in France as of September 2026 and tracks 8,552 professional contacts across them, including 2,552 with verified work emails and 219 with mobile numbers. Paris is the largest hub.

This list covers IT security companies headquartered in France, 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

696Companies

8,552Contacts tracked

2,552Verified emails

219Mobile numbers

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The 25 largest IT security companies based in France

Ranked by team size

Top 25 of 696 IT security companies based in France, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names IT security companies: 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	I-TracingIndirect evidence	Courbevoie, FranceHQ checked Sep 4, 2026	1,001-5,000	643
	“I-TRACING, pure player and cybersecurity service provider leader in France, supports over 600 clients around the world in managing their cyber risks, from anticipating threats to…” Source: company website · checked Sep 4, 2026
2	own.securityIndirect evidence	Paris, FranceHQ checked Sep 4, 2026	51-200	506
	“Founded in 2008, OWN is a Pure Player in cybersecurity, with offices in Paris, Rennes and Toulouse, but with a presence throughout France with its fully remote employees.” Source: company website · checked Sep 4, 2026
3	Devoteam Cyber TrustIndirect evidence	Levallois-Perret, FranceHQ checked Sep 4, 2026	10001+	342
	“Devoteam Cyber Trust is the cybersecurity specialist arm of the Devoteam Group.” Source: company website · checked Sep 4, 2026
4	Airbus Defence And Space CyberPartial evidence	Elancourt, FranceHQ checked Sep 4, 2026	501-1,000	223
	“The Cyber business of Airbus Defence and Space is a European specialist in cyber security for defence and aerospace systems and assets.” Source: company website · checked Sep 4, 2026
5	CybelangelIndirect evidence	Clichy, FranceHQ checked Sep 4, 2026	51-200	161
	“CybelAngel combines artificial intelligence and human expertise to help companies in all industries to detect, analyze and effectively counter cyber threats.” Source: company website · checked Sep 4, 2026
6	Services Network SecurityPartial evidence	Montpellier, FranceHQ checked Sep 4, 2026	201-500	145
	“Créée en Juin 2002, Services Network Security est spécialisée dans la sécurisation des passerelles internet et dans les interconnexions VPN.” Source: company website · checked Sep 4, 2026
7	ADNOVIndirect evidence	Venelles, FranceHQ checked Sep 4, 2026	201-500	139
	“ADNOV, filiale du groupe ADSN, acteur de renommée française à l'ancrage national, développe depuis plus de 40 ans une expertise reconnue dans la cybersécurité et la protection des…” Source: company website · checked Sep 4, 2026
8	ItrustIndirect evidence	Toulouse, FranceHQ checked Sep 4, 2026	51-200	126
	“Since January 2007, ITrust has been offering cybersecurity solutions and expertise in 6 different countries on the European market.” Source: company website · checked Sep 4, 2026
9	XMCOPartial evidence	Paris, FranceHQ checked Sep 4, 2026	51-200	112
	“Our services : Penetration tests and Security Audits, Gap Analysis and PCI DSS Certification, CERT-XMCO (vulnerability watch, Cyber Survellance/Threat Intelligence, Forensics).” Source: company website · checked Sep 4, 2026
10	EgeriePartial evidence	Toulon, FranceHQ checked Sep 4, 2026	51-200	110
	“At Egerie, we believe cybersecurity shouldn't be a constraint, it should be a true driver of sustainable performance.” Source: company website · checked Sep 4, 2026
11	QuarkslabIndirect evidence	Paris, FranceHQ checked Sep 4, 2026	51-200	94
	“Fondée en 2011 par Fred Raynal, Quarkslab est une entreprise française spécialisée dans la cybersécurité et plus spécifiquement dans la protection et l'analyse des logiciels.” Source: company website · checked Sep 4, 2026
12	Exclusive Networks FranceIndirect evidence	Boulogne Billancourt, FranceHQ checked Sep 4, 2026	51-200	93
	“Exclusive Networks (Euronext Paris: EXN) est un spécialiste mondial de la cybersécurité qui propose à ses partenaires et à ses clients finaux une unique combinaison de services et…” Source: company website · checked Sep 4, 2026
13	KNSIndirect evidence	Lyon, FranceHQ checked Sep 4, 2026	11-50	82
	“Fondée à Lyon en 2002, KNS est une Entreprise de Service du Numérique qui intervient à tous les niveaux de la sécurisation des Systèmes d'Information en France et à l'étranger.” Source: company website · checked Sep 4, 2026
14	Magellan SécuritéIndirect evidence	Paris, FranceHQ checked Sep 4, 2026	51-200	76
	“Magellan Sécurité, an entity of the Magellan Partners Group, offers integrated solutions to protect against internal threats and cyber attacks.” Source: company website · checked Sep 4, 2026
15	CS In CybersecurityIndirect evidence	Le Plessis-Robinson, FranceHQ checked Sep 4, 2026	51-200	75
	“Acteur majeur de la cybersécurité, CS Group s'appuie sur ses équipes sont composées d’experts pluridisciplinaires qui offrent à nos clients une vision claire et une capacité…” Source: company website · checked Sep 4, 2026
16	AduneoIndirect evidence	Malakoff, FranceHQ checked Sep 4, 2026	51-200	73
	“Aduneo vous accompagne à chaque étape pour protéger vos identités, sécuriser vos données et simplifier votre quotidien.” Source: company website · checked Sep 4, 2026
17	Eset FranceIndirect evidence	Marne-La-Vallee, FranceHQ checked Sep 4, 2026	51-200	71
	“Depuis plus de 30 ans, nous sommes là pour veiller à la protection du progrès et de l'innovation.” Source: company website · checked Sep 4, 2026
18	CyberliftIndirect evidence	Paris, FranceHQ checked Sep 4, 2026	51-200	55
	“Cyberlift, l'excellence et l'engagement, au service de votre cybersécurité.” Source: company website · checked Sep 4, 2026
19	SysdreamIndirect evidence	Levallois-Perret, FranceHQ checked Sep 4, 2026	51-200	53
	“À propos de SYSDREAM : Fondée il y a plus de 20 ans, Sysdream, filiale Cybersécurité du Groupe Hub One, propose aux comptes publics et privés une offre globale de solutions…” Source: company website · checked Sep 4, 2026
20	IT SystemesIndirect evidence	Malakoff, FranceHQ checked Sep 4, 2026	11-50	52
	“Votre logiciel métier devrait vous appartenir.” Source: company website · checked Sep 4, 2026
21	DattakIndirect evidence	Paris, FranceHQ checked Sep 4, 2026	51-200	51
	“Dattak is an insurtech with a mission to protect businesses against cyberattacks.” Source: company website · checked Sep 4, 2026
22	CopwellIndirect evidence	Clichy, FranceHQ checked Sep 4, 2026	51-200	51
	“COPWELL, Votre DSI externalisée en Île‑de‑France pour PME & TPE exigeantes.” Source: company website · checked Sep 4, 2026
23	AISIIndirect evidence	Saint-mandé, FranceHQ checked Sep 4, 2026	51-200	50
	“Qui sommes-nous?” Source: company website · checked Sep 4, 2026
24	EshardIndirect evidence	Pessac, FranceHQ checked Sep 4, 2026	11-50	49
	“Expertise in cybersecurity testing takes years to build but can be lost in seconds.” Source: company website · checked Sep 4, 2026
25	AtémisIndirect evidence	La Chapelle Sur Erdre, FranceHQ checked Sep 4, 2026	11-50	49
	“Depuis plus de 25 ans, ATÉMIS accompagne les entreprises dans la conception, le déploiement et la sécurisation de leurs infrastructures informatiques.” Source: company website · checked Sep 4, 2026

Showing 25 of 696 IT security companies based in France

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IT security companies based in France at a glance

As of Sep 4, 2026

1-10Median size (employees)

ParisLargest hub · 184 HQs

219Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

463

11-50

175

51-200

201-500

501-1,000

1,001-5,000

10001+

Verified emails by last verification

0–30

31–60

182

61–90

1,426

90–180

936

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 IT security 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 France whose own description of what they do matches “IT security 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 IT security companies, and records with no verified work email. Companies headquartered outside France 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, 2,552 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.

IT security companies by metro

IT security companies in Paris184
IT security companies in Lyon27

Frequently asked

How many IT security companies are there based in France?

RevenueBase identified 696 IT security companies headquartered in France 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?

I-Tracing, headquartered in Courbevoie, tops this list with the largest team on record.

Which city has the most IT security companies?

Paris leads with 184 headquartered companies, followed by Lyon (27) and Toulouse (12).

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 2,552 verified decision-maker contacts tracked across these 696 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.