Company lists · Data refreshed September 2026
Top 25 IT security pr firms based in France
RevenueBase identified 133 IT security pr firms headquartered in France as of September 2026 and tracks 1,368 professional contacts across them, including 291 with verified work emails. Paris is the largest hub.
This list covers IT security pr 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 28, 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.
The 25 largest IT security pr firms based in France
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 506 contacts → | ||||
Indirect 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 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 40 contacts → | ||||
Indirect evidence “ORNISEC est un cabinet d’expertise à la pointe de la cybersécurité, qualifié PASSI RGS, PACS et PASSI LPM par l'ANSSI.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 33 contacts → | ||||
Indirect evidence “ACG Cybersecurity est un cabinet d’Audit, de Conseil et de Gouvernance spécialisé en matière de Cybersécurité.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 32 contacts → | ||||
Strong evidence “La Nouvelle Agence is a PR firm specializing in the worlds of internet, digital media and IT – ecosystems where our experts are recognised for their in-depth knowledge and ability…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 32 contacts → | ||||
Partial evidence “Cybersecurity company founded by security experts providing the following services: Security audits, Vulnerability research, SecOps, SecArch and Trainings” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 30 contacts → | ||||
Indirect evidence “Fondée en 2001, ACE Service concentre son activité sur son savoir-faire : la sécurité des systèmes d'information.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 27 contacts → | ||||
Partial evidence “SEC-IT, filiale du groupe MCA, est le partenaire de référence en cybersécurité, combinant expertise en audit conseil, sécurité opérationnelle et formation pour accompagner les…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 26 contacts → | ||||
Indirect evidence “Certilience, Votre sécurité informatique, notre priorité!” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 18 contacts → | ||||
Indirect evidence “Alcyconie est l'acteur de référence en gestion de crise d'origine cyber.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 15 contacts → | ||||
Indirect evidence “Nous veillons sur la sécurité de votre Système d’Information.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 14 contacts → | ||||
Indirect evidence “We support organisations of all sizes and across all sectors with - penetration testing on all types of targets (web and mobile apps, infrastructure, networks, cloud, IoT, etc.)-…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 12 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 11 contacts → | ||||
Indirect evidence “LA CYBERSÉCURITÉ, VERSION AKYL Une approche aussi pragmatique que passionnée.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 11 contacts → | ||||
Partial evidence “Majorelle PR & Events est une agence de communication spécialisée en relations presse et publiques, basée à Paris.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 10 contacts → | ||||
Indirect evidence “Our services- Pentest / cybersecurity audit - Red Team as a Service - CISO as a Service - Risk Assessment” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 10 contacts → | ||||
Indirect evidence “Chez High Jack, nous sommes bien plus que des accompagnateurs de digitalisation, nous sommes des catalyseurs de la transformation numérique de votre structure!” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 8 contacts → | ||||
Indirect evidence “Andrew Lloyd & Associates is an international public relations consulting group for leading edge companies and organizations involved in emerging technologies.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 8 contacts → | ||||
Indirect evidence “Société de conseil en Sécurité de l'Information, ORASYS accompagne ses clients pour - Formaliser et piloter leurs plans d'action de sécurité- Estimer et évaluer leurs risques…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 8 contacts → | ||||
Strong evidence “Calypt is an IT Security Company which provides services for protecting your assets.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 8 contacts → | ||||
Indirect evidence “CORPCOM is a strategic communication firm launched in 2014 by Guillaume Foucault.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 7 contacts → | ||||
Indirect evidence “Première agence RP du marché qui fait votre actualité et celle des Français, avec une expertise de plus de 10 ans dans les relations presse.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 7 contacts → | ||||
Indirect evidence “Aromates propose à ses clients des solutions de relations publiques élaborées avec une vision éprouvée par les réalités du terrain : relations médias et digitales, affaires…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 6 contacts → | ||||
Indirect evidence “L'Humain - L'Excellence - La Responsabilité En bâtissant notre cabinet, nous avons voulu le faire reposer sur ces 3 piliers, devenus les 3 valeurs clefs qui déterminent toutes nos…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 5 contacts → | ||||
Indirect evidence “Leviam est un cabinet de conseil spécialisé dans la cybersécurité.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
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: IT security pr 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 IT security pr firms.
- Partial evidence
- Its own public description names part of IT security pr firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name IT security pr 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 133 IT security pr firms based in France
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IT security pr firms based in France at a glance
As of Sep 28, 2026Companies by employee count
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 133 companies.
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 pr 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 “IT security pr 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 IT security pr 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 IT security pr 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, 291 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 28, 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 pr 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 IT security pr 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 IT security pr firms are there based in France?
RevenueBase identified 133 IT security pr 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?
own.security, headquartered in Paris, tops this list with the largest team on record.
Which city has the most IT security pr firms?
Paris leads with 52 headquartered companies, followed by Toulouse (5) and Lyon (3).
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 291 verified decision-maker contacts tracked across these 133 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 28, 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 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.
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