Company lists · Data refreshed September 2026

Top 25 Cybersecurity and defense software companies based in Paris, France

Name: Cybersecurity and defense software companies based in Paris, France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 10, 2026 74 companies tracked

RevenueBase identified 74 cybersecurity and defense software companies headquartered in Paris, France as of September 2026 and tracks 5,582 professional contacts across them, including 2,715 with verified work emails and 88 with mobile numbers. Paris is the largest hub.

This list covers cybersecurity and defense software companies headquartered in Paris, 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 10, 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 10, 2026 86% judged on-target in blind review

74Companies

5,582Contacts tracked

2,715Verified emails

88Mobile numbers

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

The 25 largest cybersecurity and defense software companies based in Paris, France

Ranked by team size

Top 25 of 74 cybersecurity and defense software companies based in Paris, France, ranked by team size, largest first. Data refreshed Sep 10, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity and defense software 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	own.security	Partial evidence	Paris, FranceHQ checked Sep 10, 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 10, 2026
2	Gatewatcher	Indirect evidence	Paris, FranceHQ checked Sep 10, 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 10, 2026
3	Quarkslab	Indirect evidence	Paris, FranceHQ checked Sep 10, 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 10, 2026
4	Magellan Sécurité	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	51-200	75 contacts →
	Indirect evidence “Magellan Sécurité, an entity of the Magellan Partners Group, offers integrated solutions to protect against internal threats and cyber attacks.” Source: RevenueBase Database · checked Sep 10, 2026
5	ERIUM	Partial evidence	Paris, FranceHQ checked Sep 10, 2026	51-200	37 contacts →
	Partial evidence “To be confident in your cyber defences, every person and technology must be confronted by reality.” Source: RevenueBase Database · checked Sep 10, 2026
6	Kytl Security	Indirect evidence	Paris, FranceHQ checked Sep 10, 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 10, 2026
7	Abakus Sécurité	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	33 contacts →
	Indirect evidence “Expertise en cybersécurité - Abakus Sécurité vous accompagne sur l'ensemble du cycle de vie de vos projets en cybersécurité.” Source: RevenueBase Database · checked Sep 10, 2026
8	Randorisec	Partial evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	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 10, 2026
9	Idecsi	Partial evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	30 contacts →
	Partial evidence “French startup in cybersecurity, IDECSI delivers cutting-edge technology and engages all employees in the security system for effective and cost-efficient data protection.” Source: RevenueBase Database · checked Sep 10, 2026
10	Five Nines	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	25 contacts →
	Indirect evidence “Five Nines est née en 2019 d’un constat simple, celui d’un manque crucial de compétences et d’expérience dans la sécurisation de la transformation digitale des entreprises.” Source: RevenueBase Database · checked Sep 10, 2026
11	Saycurit	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	13 contacts →
	Indirect evidence “SAYCURIT est une société d’intégration spécialisée dans le domaine de la sécurité.” Source: RevenueBase Database · checked Sep 10, 2026
12	DND Agency	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	13 contacts →
	Indirect evidence “Are we legion?” Source: RevenueBase Database · checked Sep 10, 2026
13	Cyferall	Partial evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	11 contacts →
	Partial evidence “CyferAll is a cybersecurity startup focused on securing application data for the millions of applications deployed worldwide that were not built with security in mind.” Source: RevenueBase Database · checked Sep 10, 2026
14	Zero Trust SAS	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	10 contacts →
	Indirect evidence “ZeroTrust fournit aux PME-ETI une protection totale de leurs actifs et de leurs données.” Source: RevenueBase Database · checked Sep 10, 2026
15	Kamea Security	Partial evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	10 contacts →
	Partial evidence “Our services- Pentest / cybersecurity audit - Red Team as a Service - CISO as a Service - Risk Assessment” Source: RevenueBase Database · checked Sep 10, 2026
16	Cyber Experts	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	10 contacts →
	Indirect evidence “Startup, VSE and SME specialists, at Cyber Experts, we build a solid digital rampart for your company, allowing it to strengthen itself against cyber attackers.” Source: RevenueBase Database · checked Sep 10, 2026
17	Highjack Offensive Cybersecurity	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	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 10, 2026
18	ALSID	Partial evidence	Paris, FranceHQ checked Sep 10, 2026	51-200	8 contacts →
	Partial evidence “A $1.5-trillion cybercrime industry is evolving faster than your defenses.” Source: RevenueBase Database · checked Sep 10, 2026
19	Maguen Cyber	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	51-200	7 contacts →
	Indirect evidence “Maguen Cyber was created to provide its clients with the right security services.” Source: RevenueBase Database · checked Sep 10, 2026
20	WELAN	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	4 contacts →
	Indirect evidence “WELAN est une société de conseil en cybersécurité qui accompagne les entreprises de toutes tailles désireuses de se protéger contre les menaces numériques croissantes.” Source: RevenueBase Database · checked Sep 10, 2026
21	Akonis	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	4 contacts →
	Indirect evidence “AKONIS est un pure-player français du conseil, de l’intégration et de l’ingénierie en cybersécurité.” Source: RevenueBase Database · checked Sep 10, 2026
22	Exatrack	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	4 contacts →
	Indirect evidence “Au cours de ces dernières années le nombre d’attaques informatiques a connu une très forte augmentation, ciblant aussi bien les gouvernements que les sociétés privées.” Source: RevenueBase Database · checked Sep 10, 2026
23	Husecure	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	4 contacts →
	Indirect evidence “HUSECURE se présente comme un nouvel acteur dans le domaine de la cybersécurité, venant compléter les offres de ses marques sœurs, enrichissant l'expérience et l'héritage du…” Source: RevenueBase Database · checked Sep 10, 2026
24	Novastill	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	3 contacts →
	Indirect evidence “NovaStill a la conviction profonde que la cybersécurité est un catalyseur du succès de nos clients qui sont aussi nos partenaires.” Source: RevenueBase Database · checked Sep 10, 2026
25	Click Secure	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	3 contacts →
	Indirect evidence “ClickSecure - Partenaire en Cybersécurité pour les PME Nous sommes fiers d'être votre partenaire dévoué en cybersécurité, mettant en œuvre des solutions innovantes pour protéger…” Source: RevenueBase Database · checked Sep 10, 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 and defense software 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 cybersecurity and defense software companies.
Partial evidence: Its own public description names part of cybersecurity and defense software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity and defense software 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 74 cybersecurity and defense software companies based in Paris, France

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,715 reachable decision-makers.

Free signup · no credit card

View the full list →

Cybersecurity and defense software companies based in Paris, France at a glance

As of Sep 10, 2026

48.6%Verified-email coverage

1.6%Mobile-number coverage

75.4Average contacts per company

1-10Median size (employees)

78.4%Largest-city concentration · Paris

Sep 10, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 12.0d

2,5090–30

19131–60

161–90

090–180

14180+

Company record updated

Median 54.0d

00–30

3,04431–60

1,79661–90

43290–180

310180+

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 and defense software 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 Paris, France whose own description of what they do matches “cybersecurity and defense software 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 cybersecurity and defense software 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 cybersecurity and defense software companies, and records with no verified work email. Companies headquartered outside Paris 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, 2,715 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 10, 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 and defense software companies by metro in France

Cybersecurity and defense software companies in Paris58

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 and defense software 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 cybersecurity and defense software companies are there based in Paris, France?

RevenueBase identified 74 cybersecurity and defense software companies headquartered in Paris, 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 cybersecurity and defense software companies?

Paris leads with 58 headquartered companies, followed by Lyon (12) and Toulouse (7).

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 2,715 verified decision-maker contacts tracked across these 74 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 10, 2026.

Ready to reach these companies? Verified emails and direct dials for all 74 cybersecurity and defense software companies based in Paris, France. Start with a free account, no credit card.

Download this list →

Related lists

Cybersecurity and defense software companies 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.