Company lists · Data refreshed September 2026

Top 25 Appsec consulting companies based in France

Name: Appsec consulting 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 363 companies tracked

RevenueBase identified 363 appsec consulting companies headquartered in France as of September 2026 and tracks 4,608 professional contacts across them, including 1,289 with verified work emails. Paris is the largest hub.

This list covers appsec consulting 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

363Companies

4,608Contacts tracked

1,289Verified emails

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The 25 largest appsec consulting companies based in France

Ranked by team size

Top 25 of 363 appsec consulting 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 consulting 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 Sep 21, 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 Sep 21, 2026
2	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
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	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
5	Evabssi	Partial evidence	Paris, FranceHQ checked Sep 21, 2026	201-500	117 contacts →
	Partial evidence “EvaBssi is an international consulting firm specialized in cybersecurity and IS performance.” Source: RevenueBase Database · checked Sep 21, 2026
6	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
7	Sekera	Indirect evidence	Saint-quentin-en-yvelines, FranceHQ checked Sep 21, 2026	51-200	88 contacts →
	Indirect evidence “Sekera Services est un cabinet de conseil homologué par la DGSSI comme prestataire d’audit de sécurité SI (PASSI) répondant aux exigences en termes de démarche et qualifications…” Source: RevenueBase Database · checked Sep 21, 2026
8	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
9	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
10	Cyberlift	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	51-200	56 contacts →
	Indirect evidence “Cyberlift, l'excellence et l'engagement, au service de votre cybersécurité.” Source: RevenueBase Database · checked Sep 21, 2026
11	Scassi	Indirect evidence	Paris / Toulouse / Madrid, FranceHQ checked Sep 21, 2026	51-200	53 contacts →
	Indirect evidence “Nos collaborateurs, experts dans les domaines de la security et la safety, interviennent depuis la réalisation des analyses de risque jusqu'à la recette sécurité du projet confié…” Source: RevenueBase Database · checked Sep 21, 2026
12	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
13	Ornisec	Indirect evidence	Rennes, FranceHQ checked Sep 21, 2026	11-50	40 contacts →
	Indirect evidence “ORNISEC est un cabinet d’expertise à la pointe de la cybersécurité, qualifié PASSI RGS, PACS et PASSI LPM par l'ANSSI.” Source: RevenueBase Database · checked Sep 21, 2026
14	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
15	Løvell	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	11-50	37 contacts →
	Indirect evidence “Qui sommes-nous?” Source: RevenueBase Database · checked Sep 21, 2026
16	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
17	Atlantis	Partial evidence	Paris, FranceHQ checked Sep 21, 2026	n/a	36 contacts →
	Partial evidence “Atlantis is an IT consulting company based in Paris, France.” Source: RevenueBase Database · checked Sep 21, 2026
18	Excube	Indirect evidence	Lyon, FranceHQ checked Sep 21, 2026	11-50	33 contacts →
	Indirect evidence “Notre positionnement Fondé en 2018, EXCUBE, cabinet-conseil spécialisé en Cybersécurité, délivre ses prestations en s’appuyant sur la connaissance du métier de ses clients…” Source: RevenueBase Database · checked Sep 21, 2026
19	ACG Cybersecurity	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	11-50	33 contacts →
	Indirect evidence “ACG Cybersecurity est un cabinet d’Audit, de Conseil et de Gouvernance spécialisé en matière de Cybersécurité.” Source: RevenueBase Database · checked Sep 21, 2026
20	Randorisec	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	11-50	32 contacts →
	Indirect evidence “Cybersecurity company founded by security experts providing the following services: Security audits, Vulnerability research, SecOps, SecArch and Trainings” Source: RevenueBase Database · checked Sep 21, 2026
21	Cogiceo	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	11-50	32 contacts →
	Indirect evidence “COGICEO is a company founded in 2012, specializing in IT security audits and penetration testing (pentest).” Source: RevenueBase Database · checked Sep 21, 2026
22	ACE Service	Indirect evidence	Rouen, FranceHQ checked Sep 21, 2026	11-50	30 contacts →
	Indirect evidence “Fondée en 2001, ACE Service concentre son activité sur son savoir-faire : la sécurité des systèmes d'information.” Source: RevenueBase Database · checked Sep 21, 2026
23	Systemis	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	51-200	29 contacts →
	Indirect evidence “Created in 2009, Systemis is an international group (50 people, France, Luxemburg, UK) and covers three major areas - Architecture and Counselling in Security- IT Security…” Source: RevenueBase Database · checked Sep 21, 2026
24	Sec-It	Indirect evidence	Levallois-perret, FranceHQ checked Sep 21, 2026	11-50	27 contacts →
	Indirect evidence “SEC-IT, filiale du groupe MCA, est le partenaire de référence en cybersécurité, combinant expertise en audit conseil, sécurité opérationnelle et formation pour accompagner les…” Source: RevenueBase Database · checked Sep 21, 2026
25	Certilience	Indirect evidence	Limonest, FranceHQ checked Sep 21, 2026	11-50	26 contacts →
	Indirect evidence “Certilience, Votre sécurité informatique, notre priorité!” 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 consulting 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 consulting companies.
Partial evidence: Its own public description names part of appsec consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name appsec consulting 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 363 appsec consulting companies based in France

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Appsec consulting companies based in France at a glance

As of Sep 21, 2026

28.0%Verified-email coverage

12.7Average contacts per company

1-10Median size (employees)

31.4%Largest-city concentration · Paris

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

262

11-50

51-200

201-500

501-1,000

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 363 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 consulting 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 consulting 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 consulting 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 consulting 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, 1,289 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 consulting companies by metro

Appsec consulting companies in Paris114

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 consulting 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 consulting companies are there based in France?

RevenueBase identified 363 appsec consulting 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?

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

Which city has the most appsec consulting companies?

Paris leads with 114 headquartered companies, followed by Lyon (16) and Toulouse (11).

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 1,289 verified decision-maker contacts tracked across these 363 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.