Company lists · Data refreshed September 2026

Top 25 Ot cybersecurity companies based in France

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 374 companies tracked

RevenueBase identified 374 ot cybersecurity companies headquartered in France as of September 2026 and tracks 7,187 professional contacts across them, including 2,477 with verified work emails. Paris is the largest hub.

This list covers ot cybersecurity 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

374Companies

7,187Contacts tracked

2,477Verified emails

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The 25 largest ot cybersecurity companies based in France

Ranked by team size

Top 25 of 374 ot cybersecurity companies based in France, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to ot cybersecurity companies: 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	I-Tracing	Partial evidence	Courbevoie, FranceHQ checked Sep 21, 2026	1,001-5,000	639 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 21, 2026
2	own.security	Partial evidence	Paris, FranceHQ checked Sep 21, 2026	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 21, 2026
3	Neverhack	Partial evidence	Paris, FranceHQ checked Sep 21, 2026	1,001-5,000	382 contacts →
	Partial evidence “NEVERHACK is a French group specialized in cybersecurity for over 40 years.” Source: RevenueBase Database · checked Sep 21, 2026
4	Yogosha	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	n/a	197 contacts →
	Indirect evidence “Yogosha is an Offensive Security Testing Platform that allows companies and governments to raise their security posture.” Source: RevenueBase Database · checked Sep 21, 2026
5	Synacktiv	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	201-500	171 contacts →
	Indirect evidence “Synacktiv is an offensive security company founded in 2012 by several security experts.” Source: RevenueBase Database · checked Sep 21, 2026
6	Cybelangel	Indirect evidence	Clichy, FranceHQ checked Sep 21, 2026	51-200	160 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 21, 2026
7	Secure-Ic	Partial evidence	Cesson-sevigne, FranceHQ checked Sep 21, 2026	51-200	154 contacts →
	Partial evidence “With presence and customers across 5 continents, Secure-IC is the rising leader and the only global provider of end-to-end cybersecurity solutions for embedded systems and…” Source: RevenueBase Database · checked Sep 21, 2026
8	Gatewatcher	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	51-200	138 contacts →
	Indirect evidence “European leader in intrusion detection and advanced threat detection, Gatewatcher has been protecting the critical networks of large companies as well as public institutions since…” Source: RevenueBase Database · checked Sep 21, 2026
9	Sekoia	Partial evidence	Rennes, FranceHQ checked Sep 21, 2026	51-200	134 contacts →
	Partial evidence “Sekoia is the European agentic cybersecurity company building the Cyber Operations Platform for the AI era.” Source: RevenueBase Database · checked Sep 21, 2026
10	Itrust	Partial evidence	Toulouse, FranceHQ checked Sep 21, 2026	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 21, 2026
11	XMCO	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	51-200	111 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 21, 2026
12	Quarkslab	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	51-200	95 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 21, 2026
13	Exclusive Networks France	Indirect evidence	Boulogne Billancourt, FranceHQ checked Sep 21, 2026	51-200	94 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 21, 2026
14	CS In Cybersecurity	Indirect evidence	Le Plessis-robinson, FranceHQ checked Sep 21, 2026	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 21, 2026
15	Eset France	Indirect evidence	Marne-la-vallée, FranceHQ checked Sep 21, 2026	51-200	72 contacts →
	Indirect evidence “Depuis plus de 30 ans, nous sommes là pour veiller à la protection du progrès et de l'innovation.” Source: RevenueBase Database · checked Sep 21, 2026
16	LEXFO	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	51-200	66 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 21, 2026
17	Tenacy	Partial evidence	Lyon, FranceHQ checked Sep 21, 2026	51-200	62 contacts →
	Partial evidence “Tenacy is on a mission to make cybersecurity and compliance a business accelerator for organizations thanks to a more rationalized used of their cyber resources.” Source: RevenueBase Database · checked Sep 21, 2026
18	Sysdream	Indirect evidence	Levallois-perret, FranceHQ checked Sep 21, 2026	51-200	52 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
19	Dattak	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	51-200	49 contacts →
	Indirect evidence “Dattak is an insurtech with a mission to protect businesses against cyberattacks.” Source: RevenueBase Database · checked Sep 21, 2026
20	Eshard	Partial evidence	Pessac, FranceHQ checked Sep 21, 2026	11-50	48 contacts →
	Partial evidence “Expertise in cybersecurity testing takes years to build but can be lost in seconds.” Source: RevenueBase Database · checked Sep 21, 2026
21	Dcit Conseil	Indirect evidence	Sene, FranceHQ checked Sep 21, 2026	n/a	47 contacts →
	Indirect evidence “DCIT Conseil, société de services de consultation spécialisée dans la cybersécurité et les technologies de l'information.” Source: RevenueBase Database · checked Sep 21, 2026
22	Board Of Cyber	Indirect evidence	Sèvres, FranceHQ checked Sep 21, 2026	11-50	38 contacts →
	Indirect evidence “In 2025, in our ultra-connected world, cyber risk is one of the main concerns for businesses and public organizations.” Source: RevenueBase Database · checked Sep 21, 2026
23	ERIUM	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	51-200	37 contacts →
	Indirect evidence “To be confident in your cyber defences, every person and technology must be confronted by reality.” Source: RevenueBase Database · checked Sep 21, 2026
24	Crowdsec	Partial evidence	Paris, FranceHQ checked Sep 21, 2026	11-50	36 contacts →
	Partial evidence “CrowdSec is a leader in security blocklists, reshaping cybersecurity with its proactive defense strategy and unique collaborative approach.” Source: RevenueBase Database · checked Sep 21, 2026
25	Kytl Security	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	11-50	35 contacts →
	Indirect evidence “KYTL \| Spécialiste de la protection des données et des environnements critiques; Fondée par des experts en cybersécurité cumulant plus de 15 ans d’expérience, KYTL accompagne les…” Source: RevenueBase Database · checked Sep 21, 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: ot cybersecurity companies. 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 ot cybersecurity companies.
Partial evidence: Its own public description names part of ot cybersecurity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name ot cybersecurity companies. 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 374 ot cybersecurity companies based in France

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Ot cybersecurity companies based in France at a glance

As of Sep 21, 2026

34.5%Verified-email coverage

19.2Average contacts per company

1-10Median size (employees)

35.3%Largest-city concentration · Paris

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

244

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 374 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 ot cybersecurity companies, 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 “ot cybersecurity companies”. 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 ot cybersecurity companies), 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 ot cybersecurity 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 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, 2,477 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 21, 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.

Ot cybersecurity companies by metro

Ot cybersecurity companies in Paris132

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 ot cybersecurity companies, 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 ot cybersecurity companies are there based in France?

RevenueBase identified 374 ot cybersecurity 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 ot cybersecurity companies?

Paris leads with 132 headquartered companies, followed by Lyon (13) and Toulouse (10).

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 2,477 verified decision-maker contacts tracked across these 374 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 21, 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.