Company lists · Data refreshed October 2026

Top 25 Cybersecurity companies based in Paris, France

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

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 353 companies tracked

Our directory lists 353 cybersecurity companies based in Paris, France, with 11,343 professional contacts and 4,524 email addresses. The list was last updated in October 2026. Across France, Paris is the largest hub for this category.

Cybersecurity companies provide products and services that protect systems, networks, applications, devices, and data from unauthorized access, disruption, or misuse. This list covers companies that provide cybersecurity products, services, consulting, assessments, monitoring, incident response, or related protection for digital systems and data. Ranked by team size, largest first. Data current as of October 1, 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 Oct 1, 2026 86% judged on-target in blind review

353Companies

11,343Contacts tracked

4,524Verified emails

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The 25 largest cybersecurity companies based in Paris, France

Ranked by team size

Top 25 of 353 cybersecurity companies based in Paris, France, ranked by team size, largest first. Data refreshed Oct 1, 2026. RevenueBase Smart Search rates how each company's information relates to 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	SQUAD	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	501-1,000	803 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Oct 1, 2026
2	own.security	Strong evidence	Paris, FranceHQ checked Oct 1, 2026	51-200	506 contacts →
	Strong 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 Oct 1, 2026
3	Neverhack	Strong evidence	Paris, FranceHQ checked Oct 1, 2026	1,001-5,000	382 contacts →
	Strong evidence “NEVERHACK is a French group specialized in cybersecurity for over 40 years.” Source: RevenueBase Database · checked Oct 1, 2026
4	Synacktiv	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	201-500	171 contacts →
	Indirect evidence “Synacktiv is an offensive security company founded in 2012 by several security experts.” Source: RevenueBase Database · checked Oct 1, 2026
5	S3ns	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	51-200	151 contacts →
	Indirect evidence “Alliance entre #Thales, leader français de la #cybersécurité, et #Google, leader mondial du #Cloud proposant les meilleures technologies au service de l’#innovation, S3NS a pour…” Source: RevenueBase Database · checked Oct 1, 2026
6	Gatewatcher	Indirect evidence	Paris, FranceHQ checked Oct 1, 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 Oct 1, 2026
7	Harfanglab	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	51-200	120 contacts →
	Indirect evidence “Your endpoints, our protection - Empower your analysts, overcome the threats” Source: RevenueBase Database · checked Oct 1, 2026
8	Evabssi	Strong evidence	Paris, FranceHQ checked Oct 1, 2026	201-500	117 contacts →
	Strong evidence “EvaBssi is an international consulting firm specialized in cybersecurity and IS performance.” Source: RevenueBase Database · checked Oct 1, 2026
9	XMCO	Indirect evidence	Paris, FranceHQ checked Oct 1, 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 Oct 1, 2026
10	Quarkslab	Indirect evidence	Paris, FranceHQ checked Oct 1, 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 Oct 1, 2026
11	Magellan Sécurité	Indirect evidence	Paris, FranceHQ checked Oct 1, 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 Oct 1, 2026
12	Strangebee	Strong evidence	Paris, FranceHQ checked Oct 1, 2026	51-200	68 contacts →
	Strong evidence “StrangeBee is a cybersecurity software company based in Paris.” Source: RevenueBase Database · checked Oct 1, 2026
13	LEXFO	Indirect evidence	Paris, FranceHQ checked Oct 1, 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 Oct 1, 2026
14	OLFEO	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	51-200	60 contacts →
	Indirect evidence “Olfeo est un éditeur français d’une solution de proxy et de filtrage de contenus Internet.” Source: RevenueBase Database · checked Oct 1, 2026
15	Cyberlift	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	51-200	56 contacts →
	Indirect evidence “Cyberlift, l'excellence et l'engagement, au service de votre cybersécurité.” Source: RevenueBase Database · checked Oct 1, 2026
16	Qevlar AI	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	51-200	53 contacts →
	Indirect evidence “Qevlar AI turns security operations into a self-improving defense system.” Source: RevenueBase Database · checked Oct 1, 2026
17	patrowl.io	Strong evidence	Paris, FranceHQ checked Oct 1, 2026	11-50	50 contacts →
	Strong evidence “Patrowl is an innovative product designed by cybersecurity experts.” Source: RevenueBase Database · checked Oct 1, 2026
18	Mantra	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	51-200	49 contacts →
	Indirect evidence “Mantra is a cyber security startup filling the gap of current email security solutions.” Source: RevenueBase Database · checked Oct 1, 2026
19	Dattak	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	51-200	49 contacts →
	Indirect evidence “Dattak is an insurtech with a mission to protect businesses against cyberattacks.” Source: RevenueBase Database · checked Oct 1, 2026
20	CYNA	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	11-50	41 contacts →
	Indirect evidence “Cyna is the managed SOC that protects, detects, and responds to cyber threats 24/7.” Source: RevenueBase Database · checked Oct 1, 2026
21	Feelagile	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	11-50	39 contacts →
	Indirect evidence “FeelAgile est une start-up innovante spécialisée dans la conformité et la certification en cybersécurité.” Source: RevenueBase Database · checked Oct 1, 2026
22	Nucleon Security	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	11-50	38 contacts →
	Indirect evidence “Nucleon Security – Reprogramming the Rules of Endpoint Security In a world flooded with alerts, agents, and complexity, we chose a different path: operationalizing Zero-Trust…” Source: RevenueBase Database · checked Oct 1, 2026
23	Løvell	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	11-50	37 contacts →
	Indirect evidence “Qui sommes-nous?” Source: RevenueBase Database · checked Oct 1, 2026
24	ERIUM	Indirect evidence	Paris, FranceHQ checked Oct 1, 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 Oct 1, 2026
25	Crowdsec	Strong evidence	Paris, FranceHQ checked Oct 1, 2026	11-50	36 contacts →
	Strong evidence “CrowdSec is a leader in security blocklists, reshaping cybersecurity with its proactive defense strategy and unique collaborative approach.” Source: RevenueBase Database · checked Oct 1, 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 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 companies.
Partial evidence: Its own public description names part of cybersecurity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name 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 353 cybersecurity companies based in Paris, France

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Cybersecurity companies based in Paris, France at a glance

As of Oct 1, 2026

39.9%Verified-email coverage

32.1Average contacts per company

1-10Median size (employees)

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

210

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole France list rather than for Paris, so it is reported there. Company counts and contact totals on this page are exact for Paris, over 353 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 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 Paris, France whose own description of what they do matches “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 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 cybersecurity 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, 4,524 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 October 1, 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 companies by metro in France

Cybersecurity companies in Lyon35

Frequently asked

How many cybersecurity companies are in the directory?

The directory lists 353 cybersecurity companies based in Paris, France.

Which city in France has the most cybersecurity companies?

Paris leads France with 353 headquartered companies, followed by Lyon (35) and Toulouse (20).

How many contacts are available for cybersecurity companies?

The directory includes 11,343 professional contacts and 4,524 email addresses for the listed cybersecurity companies.

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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.