Company lists · Data refreshed November 2026

Top 25 Information security consultancy services based in France

RevenueBase identified 1,292 company matches for information security consultancy services associated with France as of November 2026 and tracks 18,709 professional contacts across them, including 5,718 with verified work emails. Paris is the largest hub.

This list covers company matches for information security consultancy services 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 November 5, 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 Nov 5, 2026 How this list was built
1,292Companies
18,709Contacts tracked
5,718Verified emails
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The 25 largest information security consultancy services based in France

Ranked by team size
Top 25 of 1,292 company matches for information security consultancy services based in France, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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 matchParis, FranceHQ recorded Nov 5, 20261,001-5,0001,693 contacts →

Exact match

“mc2i is an independent consultancy in Information System.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchMarseille, FranceHQ recorded Nov 5, 202610001+1,142 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 · Nov 5, 2026 · View company records in RevenueBase
3Exact matchParis, FranceHQ recorded Nov 5, 2026501-1,000827 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 · Nov 5, 2026 · View company records in RevenueBase
4Exact matchCourbevoie, FranceHQ recorded Nov 5, 20261,001-5,000687 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 · Nov 5, 2026 · View company records in RevenueBase
5Exact matchLissieu, FranceHQ recorded Nov 5, 20261,001-5,000574 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6Exact matchParis, FranceHQ recorded Nov 5, 202651-200558 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 · Nov 5, 2026 · View company records in RevenueBase
7Exact matchParis, FranceHQ recorded Nov 5, 2026201-500370 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 · Nov 5, 2026 · View company records in RevenueBase
8Exact matchLevallois-perret, FranceHQ recorded Nov 5, 202610001+343 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchIssy-les-moulineaux, FranceHQ recorded Nov 5, 2026201-500254 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10Exact matchCourbevoie, FranceHQ recorded Nov 5, 2026201-500238 contacts →

Exact match

“Intrinsec is focused on Information Security.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchSaint Michel Sur Orge, FranceHQ recorded Nov 5, 202651-200199 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12Exact matchVersailles, FranceHQ recorded Nov 5, 202651-200171 contacts →

Exact match

“STORDATA est spécialisée dans le conseil, l’architecture, la mise en œuvre, l’administration et le MCO d’infrastructures de sécurisation et de gestion des données.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13Exact matchVenelles, FranceHQ recorded Nov 5, 2026201-500146 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 · Nov 5, 2026 · View company records in RevenueBase
14Exact matchToulouse, FranceHQ recorded Nov 5, 202651-200134 contacts →

Exact match

“Since January 2007, ITrust has been offering cybersecurity solutions and expertise in 6 different countries on the European market.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15Exact matchParis, FranceHQ recorded Nov 5, 20261,001-5,000132 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16Exact matchParis, FranceHQ recorded Nov 5, 202651-200129 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 · Nov 5, 2026 · View company records in RevenueBase
17Exact matchStrasbourg, FranceHQ recorded Nov 5, 202651-20092 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 · Nov 5, 2026 · View company records in RevenueBase
18Exact matchLens, FranceHQ recorded Nov 5, 202651-20092 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 · Nov 5, 2026 · View company records in RevenueBase
19Exact matchSaint-quentin-en-yvelines, FranceHQ recorded Nov 5, 202651-20089 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 · Nov 5, 2026 · View company records in RevenueBase
20Exact matchLyon, FranceHQ recorded Nov 5, 202611-5089 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 · Nov 5, 2026 · View company records in RevenueBase
21Exact matchLevallois Perret, FranceHQ recorded Nov 5, 202611-5089 contacts →

Exact match

“Fort de 10 années d’expérience et d’innovation dans le domaine de la sûreté, Novadis vous accompagne dans l’élaboration de solutions convergentes et interopérables.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22Exact matchLannion, FranceHQ recorded Nov 5, 2026n/a83 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23Exact matchMalakoff, FranceHQ recorded Nov 5, 202651-20079 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 · Nov 5, 2026 · View company records in RevenueBase
24Exact matchParis, FranceHQ recorded Nov 5, 202651-20073 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 · Nov 5, 2026 · View company records in RevenueBase
25Exact matchParis, FranceHQ recorded Nov 5, 202611-5073 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 · Nov 5, 2026 · View company records in RevenueBase

Showing 25 of 1,292 information security consultancy services based in France

See the full list, filter by size, metro and specialty, and access 5,718 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Information security consultancy services based in France at a glance

As of Nov 5, 2026
30.6%Verified-email coverage
14.5Average contacts per company
1-10Median size (employees)
24.3%Largest-city concentration · Paris
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
910
11-50
293
51-200
61
201-500
9
501-1,000
1
1,001-5,000
5
5,001-10,000
1
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 1,292 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 consultancy services” 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 5,718 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 November 5, 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 consultancy services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many information security consultancy services are there based in France?

RevenueBase identified 1,292 company matches for information security consultancy services associated with France as of November 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?

Mc2i tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most information security consultancy services?

Paris leads with 314 company records, followed by Lyon (53) and Toulouse (21).

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 5,718 professional contacts with verified work emails tracked across these 1,292 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 November 5, 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.