Company lists · Data refreshed September 2026

Top 25 Cybersecurity consulting firms based in France

Name: Cybersecurity consulting firms based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 1,156 companies tracked

RevenueBase identified 1,156 cybersecurity consulting firms headquartered in France as of September 2026 and tracks 15,637 professional contacts across them, including 4,953 with verified work emails and 381 with mobile numbers. Paris is the largest hub.

This list covers cybersecurity consulting firms 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, 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

1,156Companies

15,637Contacts tracked

4,953Verified emails

381Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest cybersecurity consulting firms based in France

Ranked by team size

Top 25 of 1,156 cybersecurity consulting firms based in France, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity consulting firms: 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	Airbus Protect	Partial evidence	Blagnac, France	1,001-5,000	1,429 contacts →
	Partial evidence “Airbus Protect is an Airbus subsidiary bringing together expertise in cybersecurity, safety and sustainability-related services.” Source: RevenueBase Database · checked Sep 1, 2026
2	I-Tracing	Partial evidence	Courbevoie, France	1,001-5,000	643 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 1, 2026
3	Byblos Group	Indirect evidence	Lissieu, France	1,001-5,000	529 contacts →
	Indirect evidence “Byblos Group est un groupe indépendant spécialisé dans la protection des personnes, des biens et des données, avec une approche sur mesure, fondée sur l’excellence opérationnelle…” Source: RevenueBase Database · checked Sep 1, 2026
4	own.security	Partial evidence	Rennes, France	51-200	506 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 1, 2026
5	Metsys	Indirect evidence	Lille, France	501-1,000	408 contacts →
	Indirect evidence “Metsys est un intégrateur de solutions de cybersécurité, d’infrastructure et de cloud.” Source: RevenueBase Database · checked Sep 1, 2026
6	Synetis	Indirect evidence	Cesson-Sevigne, France	201-500	369 contacts →
	Indirect evidence “Founded in 2010, Synetis is the leading independent French consultancy firm specialising in information systems security (ISS).” Source: RevenueBase Database · checked Sep 1, 2026
7	Devoteam Cyber Trust	Partial evidence	Levallois-Perret, France	10001+	342 contacts →
	Partial evidence “Devoteam Cyber Trust is the cybersecurity specialist arm of the Devoteam Group.” Source: RevenueBase Database · checked Sep 1, 2026
8	Cyllene	Indirect evidence	Nanterre, France	201-500	279 contacts →
	Indirect evidence “Chez Cyllene, on couvre le spectre complet de votre besoin en termes de : Conseils 🧬 Définition d’architectures Hébergement & Services managés Cybersécurité & Formations…” Source: RevenueBase Database · checked Sep 1, 2026
9	Formind	Indirect evidence	Issy-Les-Moulineaux, France	201-500	252 contacts →
	Indirect evidence “Formind est un leader français indépendant, expert en cybersécurité.” Source: RevenueBase Database · checked Sep 1, 2026
10	Intrinsec	Indirect evidence	Courbevoie, France	201-500	247 contacts →
	Indirect evidence “Intrinsec is focused on Information Security.” Source: RevenueBase Database · checked Sep 1, 2026
11	Synacktiv	Indirect evidence	Toulouse, France	51-200	170 contacts →
	Indirect evidence “Synacktiv is an offensive security company founded in 2012 by several security experts.” Source: RevenueBase Database · checked Sep 1, 2026
12	Cybelangel	Indirect evidence	Clichy, France	51-200	161 contacts →
	Indirect evidence “CybelAngel combines artificial intelligence and human expertise to help companies in all industries to detect, analyze and effectively counter cyber threats.” Source: RevenueBase Database · checked Sep 1, 2026
13	ADNOV	Indirect evidence	France	201-500	139 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 1, 2026
14	Itrust	Partial evidence	Toulouse, France	51-200	126 contacts →
	Partial evidence “Since January 2007, ITrust has been offering cybersecurity solutions and expertise in 6 different countries on the European market.” Source: RevenueBase Database · checked Sep 1, 2026
15	XMCO	Indirect evidence	Labege, France	51-200	112 contacts →
	Indirect evidence “Our services : Penetration tests and Security Audits, Gap Analysis and PCI DSS Certification, CERT-XMCO (vulnerability watch, Cyber Survellance/Threat Intelligence, Forensics).” Source: RevenueBase Database · checked Sep 1, 2026
16	Egerie	Partial evidence	Paris, France	51-200	110 contacts →
	Partial evidence “At Egerie, we believe cybersecurity shouldn't be a constraint, it should be a true driver of sustainable performance.” Source: RevenueBase Database · checked Sep 1, 2026
17	Quarkslab	Indirect evidence	Paris, France	51-200	94 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 1, 2026
18	Exclusive Networks France	Indirect evidence	Boulogne Billancourt, France	51-200	93 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 1, 2026
19	Sekera	Indirect evidence	Saint-Quentin-En-Yvelines, France	51-200	86 contacts →
	Indirect evidence “Sekera Services est un cabinet de conseil homologué par la DGSSI comme prestataire d’audit de sécurité SI (PASSI) répondant aux exigences en termes de démarche et qualifications…” Source: RevenueBase Database · checked Sep 1, 2026
20	CS In Cybersecurity	Indirect evidence	Le Plessis-Robinson, France	51-200	75 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 1, 2026
21	Celios	Indirect evidence	Bordeaux, France	51-200	73 contacts →
	Indirect evidence “Celios : l'expertise globale IT avec ses services intégrés en infogérance, cybersécurité, innovation technologique et gestion de talents spécialisés.” Source: RevenueBase Database · checked Sep 1, 2026
22	Aduneo	Indirect evidence	Malakoff, France	51-200	73 contacts →
	Indirect evidence “Aduneo vous accompagne à chaque étape pour protéger vos identités, sécuriser vos données et simplifier votre quotidien.” Source: RevenueBase Database · checked Sep 1, 2026
23	LEXFO	Indirect evidence	Paris, France	51-200	65 contacts →
	Indirect evidence “LEXFO is an offensive security firm that assesses and strengthens your systems with an expert, pragmatic, results-driven approach.” Source: RevenueBase Database · checked Sep 1, 2026
24	Login Sécurité	Indirect evidence	Saint-Cloud, France	51-200	60 contacts →
	Indirect evidence “LA SÉCURITÉ CRÉATRICE DE VALEUR POUR LES CLIENTS Login Sécurité accompagne les DSI dans la définition et la mise en œuvre de leur stratégie de Confiance Numérique.” Source: RevenueBase Database · checked Sep 1, 2026
25	FOKUS	Indirect evidence	Lyon, France	51-200	60 contacts →
	Indirect evidence “FOKUS, où l’Humain et la Technologie se rencontrent.” Source: RevenueBase Database · checked Sep 1, 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: cybersecurity consulting firms. 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 cybersecurity consulting firms.
Partial evidence: Its own public description names part of cybersecurity consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity consulting firms. 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 1,156 cybersecurity consulting firms based in France

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 4,953 reachable decision-makers.

Free signup · no credit card

View the full list →

Cybersecurity consulting firms based in France at a glance

As of Sep 1, 2026

31.7%Verified-email coverage

2.4%Mobile-number coverage

13.5Average contacts per company

1-10Median size (employees)

29.4%Largest-city concentration · Paris

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

799

11-50

267

51-200

201-500

501-1,000

1,001-5,000

10001+

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 consulting firms, 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 France whose own description of what they do matches “cybersecurity consulting firms”. 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 consulting firms), 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 consulting firms, 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 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, 4,953 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 consulting firms 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 consulting firms, 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 consulting firms are there based in France?

RevenueBase identified 1,156 cybersecurity consulting firms 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?

Airbus Protect, headquartered in Blagnac, tops this list with the largest team on record.

Which city has the most cybersecurity consulting firms?

Paris leads with 340 headquartered companies, followed by Lyon (36) and Toulouse (22).

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 4,953 verified decision-maker contacts tracked across these 1,156 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.

Ready to reach these companies? Verified emails and direct dials for all 1,156 cybersecurity consulting firms based in France. Start with a free account, no credit card.

Download this list →

Related lists

Cybersecurity consulting firms by geography

Browse the directory

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.