Company lists · Data refreshed September 2026

Top 25 Data security companies based in Paris, France

Name: Data security 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 61 companies tracked

RevenueBase identified 61 data security companies headquartered in Paris, France as of September 2026 and tracks 4,376 professional contacts across them, including 2,337 with verified work emails and 68 with mobile numbers. Paris is the largest hub.

This list covers data security 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

61Companies

4,376Contacts tracked

2,337Verified emails

68Mobile numbers

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The 25 largest data security companies based in Paris, France

Ranked by team size

Top 25 of 61 data security 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 data security 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	Neverhack	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1,001-5,000	382 contacts →
	Indirect evidence “NEVERHACK is a French group specialized in cybersecurity for over 40 years.” Source: RevenueBase Database · checked Sep 10, 2026
2	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
3	Idecsi	Strong evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	30 contacts →
	Strong 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
4	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
5	Dowsers	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	21 contacts →
	Indirect evidence “Dowsers : : provides cutting-edge cybersecurity solutions and services which enhance trust in new digital assets such as cryptocurrencies, NFTs, smart contracts and digital…” Source: RevenueBase Database · checked Sep 10, 2026
6	Cosmian	Partial evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	15 contacts →
	Partial evidence “We offer a unique, comprehensive data protection suite powered by next-generation cryptography to secure your data in use and protect what matters most.” Source: RevenueBase Database · checked Sep 10, 2026
7	Intuity	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	15 contacts →
	Indirect evidence “Nous aidons les entreprises à sécuriser leurs actifs, tels que leurs applications web et leurs systèmes d'information, tout en renforçant la sécurité globale des organisations.” Source: RevenueBase Database · checked Sep 10, 2026
8	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
9	Cyferall	Strong evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	11 contacts →
	Strong 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
10	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
11	cybersolutions.fr	Partial evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	9 contacts →
	Partial evidence “For 10 years we have supported our clients in protecting their information assets: SIEM / SOC / SOAR; Threat Intelligence / UBA / IAM / API Security” Source: RevenueBase Database · checked Sep 10, 2026
12	Internet Of Trust	Partial evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	8 contacts →
	Partial evidence “Founded in February 2014, Internet of Trust is an independent security consulting company based in Paris and in Marseille area.” Source: RevenueBase Database · checked Sep 10, 2026
13	Blackbart	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	7 contacts →
	Indirect evidence “BlackBart est un cabinet de conseil en cybersécurité accompagnant les organisations publiques et privées dans la sécurisation de leurs environnements numériques et la maîtrise de…” Source: RevenueBase Database · checked Sep 10, 2026
14	2cloud	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	5 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 10, 2026
15	Difenso	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	5 contacts →
	Indirect evidence “Fruit de 5 ans de travail de notre lab de recherches en sécurité informatique, la protection de la donnée que nous offrons représente une nouvelle approche de la sécurité digitale…” Source: RevenueBase Database · checked Sep 10, 2026
16	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
17	Cysafe Consulting	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	4 contacts →
	Indirect evidence “CySAFE Consulting est un cabinet de conseil spécialisé en cybersécurité et management des risques qui accompagne les grandes, comme les petites entreprises, ainsi que les…” Source: RevenueBase Database · checked Sep 10, 2026
18	IT NOW	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	4 contacts →
	Indirect evidence “Depuis plus de 20 ans, notre ESN accompagne de grands groupes dans la sécurisation de leurs données et la gestion des risques liés à la cybersécurité.” Source: RevenueBase Database · checked Sep 10, 2026
19	Lemoncurl	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	3 contacts →
	Indirect evidence “DataManagement and DataProtection compagny” Source: RevenueBase Database · checked Sep 10, 2026
20	FABOR	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	3 contacts →
	Indirect evidence “Control your risks towards cyber threats” Source: RevenueBase Database · checked Sep 10, 2026
21	Kerys Integrated Solutions	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	2 contacts →
	Indirect evidence “KERYS Integrated Solutions, Building Digital Trust English version KERYS Integrated Solutions, building digital trust through strategy, governance, and cybersecurity excellence.” Source: RevenueBase Database · checked Sep 10, 2026
22	Nextwyn	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	201-500	2 contacts →
	Indirect evidence “NEXTWYN - Sécuriser les identités au cœur des systèmes critiques NEXTWYN est la division cybersécurité et digital du groupe WYNSYS, acteur indépendant spécialisé SAP depuis plus…” Source: RevenueBase Database · checked Sep 10, 2026
23	BMB Consultx	Indirect evidence	Paris, FranceHQ checked Sep 10, 2026	11-50	2 contacts →
	Indirect evidence “BMB ConsultX is a cybersecurity consulting firm.” Source: RevenueBase Database · checked Sep 10, 2026
24	rootsec.eu	Strong evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	1 contacts →
	Strong evidence “Protecting your data from the most severe threats begins with a disciplined approach to securing your entire information technology infrastructure.” Source: RevenueBase Database · checked Sep 10, 2026
25	Cryptai	Strong evidence	Paris, FranceHQ checked Sep 10, 2026	1-10	1 contacts →
	Strong evidence “Protection and processing of sentitive data - secured and auditable memory pool - remote encryption & decryption of data in the cloud enabling remote processing and security at…” 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: data security 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 data security companies.
Partial evidence: Its own public description names part of data security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name data security 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 61 data security companies based in Paris, France

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Data security companies based in Paris, France at a glance

As of Sep 10, 2026

53.4%Verified-email coverage

1.6%Mobile-number coverage

71.7Average contacts per company

1-10Median size (employees)

57.4%Largest-city concentration · Paris

Sep 10, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Freshness & accuracy

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

Email last verified

Median 12.0d

2,1560–30

16631–60

061–90

090–180

15180+

Company record updated

Median 51.0d

00–30

2,57831–60

1,24761–90

31090–180

241180+

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 data security 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 “data security 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 data security 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 data security 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, 2,337 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.

Data security companies by metro in France

Data security companies in Paris35

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 data security 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 data security companies are there based in Paris, France?

RevenueBase identified 61 data security 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?

Neverhack, headquartered in Paris, tops this list with the largest team on record.

Which city has the most data security companies?

Paris leads with 35 headquartered companies, followed by Lyon (5) and Toulouse (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 2,337 verified decision-maker contacts tracked across these 61 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.

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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.