Company lists · Data refreshed October 2026

Top 25 Information security consultancies based in France

RevenueBase identified 921 company matches for information security consultancies associated with France as of October 2026 and tracks 11,388 professional contacts across them, including 3,689 with verified work emails. Paris is the largest hub.

This list covers company matches for information security consultancies associated with France, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 1, 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 RevenueBase SmartSearch · Exact Recorded Oct 1, 2026 How this list was built
921Companies
11,388Contacts tracked
3,689Verified emails
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The 25 largest information security consultancies based in France

Ranked by team size
Top 25 of 921 company matches for information security consultancies based in France, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchMarseille, FranceHQ recorded Oct 1, 202610001+1,007 contacts →

Exact match

“La proposition de valeur d'Onet dans la sécurité se fonde sur - son expertise sécurité et sa capacité à analyser les besoins et risques propres à ses clients- sa parfaite maîtrise…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2Exact matchParis, FranceHQ recorded Oct 1, 2026501-1,000803 contacts →

Exact match

“The growing threat of cyber risks, the expansion of cloud computing and the emergence of the DevOps movement are reshaping IT practices, enlighting the relevance of our vision for…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3Exact matchCourbevoie, FranceHQ recorded Oct 1, 20261,001-5,000639 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4Exact matchParis, FranceHQ recorded Oct 1, 202651-200506 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5Exact matchParis, FranceHQ recorded Oct 1, 20261,001-5,000382 contacts →

Exact match

“NEVERHACK is a French group specialized in cybersecurity for over 40 years.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6Exact matchParis, FranceHQ recorded Oct 1, 2026201-500359 contacts →

Exact match

“Founded in 2010, Synetis is the leading independent French consultancy firm specialising in information systems security (ISS).”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7Exact matchLevallois-perret, FranceHQ recorded Oct 1, 202610001+338 contacts →

Exact match

“Devoteam Cyber Trust is the cybersecurity specialist arm of the Devoteam Group.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8Exact matchCourbevoie, FranceHQ recorded Oct 1, 2026201-500245 contacts →

Exact match

“Intrinsec is focused on Information Security.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9Exact matchIssy-les-moulineaux, FranceHQ recorded Oct 1, 2026201-500244 contacts →

Exact match

“Formind est un leader français indépendant, expert en cybersécurité.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10Exact matchVenelles, FranceHQ recorded Oct 1, 2026201-500139 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11Exact matchParis, FranceHQ recorded Oct 1, 2026201-500117 contacts →

Exact match

“EvaBssi is an international consulting firm specialized in cybersecurity and IS performance.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12Exact matchParis, FranceHQ recorded Oct 1, 2026201-500117 contacts →

Exact match

“Forward Global designs and delivers services and technologies to manage digital, economic, and information risks.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13Exact matchParis, FranceHQ recorded Oct 1, 202651-200111 contacts →

Exact match

“Our services : Penetration tests and Security Audits, Gap Analysis and PCI DSS Certification, CERT-XMCO (vulnerability watch, Cyber Survellance/Threat Intelligence, Forensics).”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14Exact matchLens, FranceHQ recorded Oct 1, 202651-20096 contacts →

Exact match

“ARAMYS est une société de Conseil et d'Expertise intervenant sur l'ensemble des problématiques des PME/PMI et Grands Comptes liées aux Systèmes d'Information et de Communication…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15Exact matchSaint-quentin-en-yvelines, FranceHQ recorded Oct 1, 202651-20088 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16Exact matchFranceHQ recorded Oct 1, 2026n/a83 contacts →

Exact match

“Depuis 20 ans, Isitix accompagne vos projets informatiques et numériques.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17Exact matchLyon, FranceHQ recorded Oct 1, 202611-5082 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18Exact matchStrasbourg, FranceHQ recorded Oct 1, 202651-20081 contacts →

Exact match

“HARA Consulting est un groupe spécialisé dans la transformation numérique des entreprises par la mise en place d'outils IA, data et tech.+ 1⃣ 0⃣ 0⃣ Collaborateurs - Experts…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19Exact matchLe Plessis-robinson, FranceHQ recorded Oct 1, 202651-20075 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20Exact matchMalakoff, FranceHQ recorded Oct 1, 202651-20073 contacts →

Exact match

“Aduneo vous accompagne à chaque étape pour protéger vos identités, sécuriser vos données et simplifier votre quotidien.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21Exact matchParis, FranceHQ recorded Oct 1, 202611-5069 contacts →

Exact match

“Créé en 2002 et rejoignant le groupe TVH Consulting en 2022, FIDENS est éditeur et expert français en cybersécurité et vous accompagne de l'audit de sécurité à la mise en place de…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22Exact matchParis, FranceHQ recorded Oct 1, 202651-20068 contacts →

Exact match

“La société AMD BLUE est née de l’intention de son président, Michel Delouya, de fonder une ESN (anciennement SSII) dans laquelle la qualité et l’accompagnement assidus du service…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23Exact matchLyon, FranceHQ recorded Oct 1, 202651-20061 contacts →

Exact match

“FOKUS, où l’Humain et la Technologie se rencontrent.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24Exact matchParis, FranceHQ recorded Oct 1, 202651-20059 contacts →

Exact match

“VONA, cabinet de conseil indépendant en cybergouvernance et stratégie digitale accompagne les entreprises et les acteurs publics à sécuriser, piloter et valoriser leur…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
25Exact matchSaint-cloud, FranceHQ recorded Oct 1, 202651-20059 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase

Showing 25 of 921 information security consultancies based in France

See the full list, filter by size, metro and specialty, and access 3,689 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Information security consultancies based in France at a glance

As of Oct 1, 2026
32.4%Verified-email coverage
12.4Average contacts per company
1-10Median size (employees)
26.9%Largest-city concentration · Paris
Oct 1, 2026Page data refreshed

Companies by employee count

1-10
669
11-50
191
51-200
43
201-500
10
501-1,000
1
1,001-5,000
3
10001+
3

Email recency for this list is measured worldwide rather than for France, so it is reported there. Company counts and contact totals on this page are exact for France, over 921 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with France whose business descriptions match “information security consultancies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 3,689 professional contacts with verified work emails across the full matched dataset. 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 October 1, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “information security consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many information security consultancies are there based in France?

RevenueBase identified 921 company matches for information security consultancies associated with France as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Onet Sécurité tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most information security consultancies?

Paris leads with 248 company records, followed by Lyon (34) and Toulouse (16).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 3,689 professional contacts with verified work emails tracked across these 921 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 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 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.