Company lists · Data refreshed September 2026

Top 25 Appsec companies based in France

Name: Appsec 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 422 companies tracked

RevenueBase identified 422 appsec companies headquartered in France as of September 2026 and tracks 5,140 professional contacts across them, including 1,522 with verified work emails. Paris is the largest hub.

This list covers appsec 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

422Companies

5,140Contacts tracked

1,522Verified emails

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The 25 largest appsec companies based in France

Ranked by team size

Top 25 of 422 appsec 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 appsec 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	Yeswehack	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	51-200	586 contacts →
	Indirect evidence “YesWeHack is a leading Offensive Security and Exposure Management platform delivering integrated, API-based solutions to secure organisations’ growing attack surfaces.” Source: RevenueBase Database · checked Sep 21, 2026
2	Verimatrix	Indirect evidence	Meyreuil, FranceHQ checked Sep 21, 2026	201-500	210 contacts →
	Indirect evidence “Verimatrix (Euronext Paris: VMX) helps power the modern connected world with security made for people.” Source: RevenueBase Database · checked Sep 21, 2026
3	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
4	Gitguardian	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	51-200	181 contacts →
	Indirect evidence “We're hiring: building an outstanding tech team in Paris right now!” 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	Secure-Ic	Indirect evidence	Cesson-sevigne, FranceHQ checked Sep 21, 2026	51-200	154 contacts →
	Indirect 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
7	Itrust	Indirect evidence	Toulouse, FranceHQ checked Sep 21, 2026	51-200	126 contacts →
	Indirect 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
8	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
9	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
10	KNS	Indirect evidence	Lyon, FranceHQ checked Sep 21, 2026	11-50	82 contacts →
	Indirect evidence “Fondée à Lyon en 2002, KNS est une Entreprise de Service du Numérique qui intervient à tous les niveaux de la sécurisation des Systèmes d'Information en France et à l'étranger.” Source: RevenueBase Database · checked Sep 21, 2026
11	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
12	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
13	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
14	OLFEO	Indirect evidence	Paris, FranceHQ checked Sep 21, 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 Sep 21, 2026
15	UBIKA	Indirect evidence	Meudon La Foret, FranceHQ checked Sep 21, 2026	51-200	59 contacts →
	Indirect evidence “Founded in 2001, with headquarters in Meudon, France and a research facility in Montpellier, UBIKA is a European cybersecurity vendor.” Source: RevenueBase Database · checked Sep 21, 2026
16	patrowl.io	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	11-50	50 contacts →
	Indirect evidence “Patrowl is an innovative product designed by cybersecurity experts.” Source: RevenueBase Database · checked Sep 21, 2026
17	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
18	Trustinsoft	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	11-50	48 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
19	Eshard	Indirect evidence	Pessac, FranceHQ checked Sep 21, 2026	11-50	48 contacts →
	Indirect evidence “Expertise in cybersecurity testing takes years to build but can be lost in seconds.” Source: RevenueBase Database · checked Sep 21, 2026
20	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
21	Cyberwatch	Indirect evidence	Massy, FranceHQ checked Sep 21, 2026	11-50	43 contacts →
	Indirect evidence “Cyberwatch - French cybersecurity company specialized in Vulnerability & Compliance Management Products- Cyberwatch Vulnerability Manager - Cyberwatch Compliance Manager Services-…” Source: RevenueBase Database · checked Sep 21, 2026
22	Anozr WAY	Indirect evidence	Cesson-sévigné, FranceHQ checked Sep 21, 2026	11-50	40 contacts →
	Indirect evidence “Today, 80% of cyberattacks exploit human vulnerabilities.” Source: RevenueBase Database · checked Sep 21, 2026
23	ZIWIT	Indirect evidence	Montpellier, FranceHQ checked Sep 21, 2026	51-200	38 contacts →
	Indirect evidence “Looking for services & solutions to secure your organization and your web applications?” Source: RevenueBase Database · checked Sep 21, 2026
24	Digitemis	Indirect evidence	Rezé, FranceHQ checked Sep 21, 2026	11-50	37 contacts →
	Indirect evidence “Digitemis est expert dans le conseil en cybersécurité et protection des données personnelles.” Source: RevenueBase Database · checked Sep 21, 2026
25	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

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: appsec 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 appsec companies.
Partial evidence: Its own public description names part of appsec companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name appsec 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 422 appsec companies based in France

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Appsec companies based in France at a glance

As of Sep 21, 2026

29.6%Verified-email coverage

12.2Average contacts per company

1-10Median size (employees)

34.6%Largest-city concentration · Paris

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

295

11-50

51-200

201-500

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 422 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 appsec 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 “appsec 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 appsec 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 appsec 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, 1,522 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.

Appsec companies by metro

Appsec companies in Paris146

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 appsec 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 appsec companies are there based in France?

RevenueBase identified 422 appsec 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?

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

Which city has the most appsec companies?

Paris leads with 146 headquartered companies, followed by Lyon (17) and Toulouse (12).

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 1,522 verified decision-maker contacts tracked across these 422 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.