Company lists · Data refreshed September 2026

Top 25 Secure software development consulting companies based in France

Name: Secure software development consulting companies based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 336 companies tracked

RevenueBase identified 336 secure software development consulting companies headquartered in France as of September 2026 and tracks 3,428 professional contacts across them, including 1,156 with verified work emails. Paris is the largest hub.

This list covers secure software development 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 29, 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 29, 2026 86% judged on-target in blind review

336Companies

3,428Contacts tracked

1,156Verified emails

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The 25 largest secure software development consulting companies based in France

Ranked by team size

Top 25 of 336 secure software development consulting companies based in France, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to secure software development 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	Zenika	Partial evidence	Paris, FranceHQ checked Sep 29, 2026	501-1,000	430 contacts →
	Partial evidence “Zenika is an IT consulting firm with 550 employees that helps companies with their digital transformation.” Source: RevenueBase Database · checked Sep 29, 2026
2	Ouidou	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	201-500	252 contacts →
	Indirect evidence “Fondée en 2017, Ouidou est une entreprise de services du numérique regroupant plus de 250 collaborateurs.” Source: RevenueBase Database · checked Sep 29, 2026
3	Avisto	Strong evidence	Valbonne, FranceHQ checked Sep 29, 2026	201-500	226 contacts →
	Strong evidence “The software development: your passion, our profession.” Source: RevenueBase Database · checked Sep 29, 2026
4	Tritux	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	51-200	108 contacts →
	Indirect evidence “Depuis sa création en 2006, TRITUX a développé une expertise et un savoir faire lui permettant de mener à bien tous ses projets de l’amont à l’aval.” Source: RevenueBase Database · checked Sep 29, 2026
5	Orness	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	51-200	106 contacts →
	Indirect evidence “ORNESS conseille et réalise les solutions IT permettant à ses clients de se transformer et d'innover.” Source: RevenueBase Database · checked Sep 29, 2026
6	Arolla	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	51-200	105 contacts →
	Indirect evidence “Arolla est une société de conseil spécialisée dans les techniques les plus avancées de développement logiciel : Clean Code, TDD, BDD, Legacy Remediation, style de Programmation…” Source: RevenueBase Database · checked Sep 29, 2026
7	Scassi	Partial evidence	Paris / Toulouse / Madrid, FranceHQ checked Sep 29, 2026	51-200	53 contacts →
	Partial 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 29, 2026
8	BILOG	Indirect evidence	Versailles, FranceHQ checked Sep 29, 2026	51-200	51 contacts →
	Indirect evidence “Bilog SAS est une ESN basée à Versailles qui, forte de ses plus de 530 projets réalisés (à l'été 2016), propose aux éditeurs de logiciels et aux ETI, des compétences dans la…” Source: RevenueBase Database · checked Sep 29, 2026
9	CONIX	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	51-200	49 contacts →
	Indirect evidence “Conix Technologies et Services est une ESN, filiale de Conix Services créée en 1997, dédiée à la réalisation et à la sécurisation du Système d’Information de l’entreprise étendue.” Source: RevenueBase Database · checked Sep 29, 2026
10	Dcit Conseil	Indirect evidence	Sene, FranceHQ checked Sep 29, 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 29, 2026
11	Ornisec	Indirect evidence	Rennes, FranceHQ checked Sep 29, 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 29, 2026
12	Atlantis	Partial evidence	Paris, FranceHQ checked Sep 29, 2026	n/a	36 contacts →
	Partial evidence “Atlantis is an IT consulting company based in Paris, France.” Source: RevenueBase Database · checked Sep 29, 2026
13	Codeworks	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	11-50	34 contacts →
	Indirect evidence “Créée en 2018, CodeWorks est une ESN d’ingénierie logicielle qui accompagne les directions techniques sur des enjeux concrets de delivery, de qualité et de scalabilité.” Source: RevenueBase Database · checked Sep 29, 2026
14	Excube	Indirect evidence	Lyon, FranceHQ checked Sep 29, 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 29, 2026
15	Omicrone	Strong evidence	La Garenne Colombes, FranceHQ checked Sep 29, 2026	51-200	33 contacts →
	Strong evidence “OMICRONE is a consulting and engineering company in new technologies, supporting its clients in the design, development and maintenance of their applications.” Source: RevenueBase Database · checked Sep 29, 2026
16	ACE Service	Indirect evidence	Rouen, FranceHQ checked Sep 29, 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 29, 2026
17	Systemis	Partial evidence	Paris, FranceHQ checked Sep 29, 2026	51-200	29 contacts →
	Partial 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 29, 2026
18	Wapsi ESN Bitd	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	11-50	28 contacts →
	Indirect evidence “WAPSI est une ESN spécialisée en Défense Nos 4 domaines d’expertise : Le DevOps/Automatisation/Testing, la Performance Applicative, les Dev senior et la Data Intelligence.” Source: RevenueBase Database · checked Sep 29, 2026
19	Certilience	Indirect evidence	Limonest, FranceHQ checked Sep 29, 2026	11-50	26 contacts →
	Indirect evidence “Certilience, Votre sécurité informatique, notre priorité!” Source: RevenueBase Database · checked Sep 29, 2026
20	Prestaconcept	Indirect evidence	Lyon, FranceHQ checked Sep 29, 2026	11-50	24 contacts →
	Indirect evidence “Prestaconcept met à votre service des prestations sur mesure basées sur le conseil, l'expertise, l'accompagnement et la qualité.” Source: RevenueBase Database · checked Sep 29, 2026
21	ADN Conseils	Indirect evidence	Chauny, FranceHQ checked Sep 29, 2026	11-50	23 contacts →
	Indirect evidence “AdN Conseils 🧬 forme, équipe, sécurise et conseille en informatique les PME de tous secteurs d’activités confondus.” Source: RevenueBase Database · checked Sep 29, 2026
22	Timsoft	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	11-50	23 contacts →
	Indirect evidence “Grand Compte, PME, Start-Up, du secteur industriel, marchand, bancaire, les équipes de Timsoft vous accompagnent.” Source: RevenueBase Database · checked Sep 29, 2026
23	Devmachine	Indirect evidence	Cesson-sévigné, FranceHQ checked Sep 29, 2026	11-50	22 contacts →
	Indirect evidence “DEVmachine est une agence de développement logiciel.” Source: RevenueBase Database · checked Sep 29, 2026
24	AGL Consult	Indirect evidence	Arcueil, FranceHQ checked Sep 29, 2026	11-50	21 contacts →
	Indirect evidence “AGL Consult, ESN experte sur les technologies PC SOFT, accompagne ses clients dans toutes les phases de réalisation d'une solution logicielle sur-mesure : assistance à la…” Source: RevenueBase Database · checked Sep 29, 2026
25	NBS System	Indirect evidence	Champs-sur-marne, FranceHQ checked Sep 29, 2026	11-50	21 contacts →
	Indirect evidence “Pour de nombreuses entreprises, la thématique de la sécurité arrive après compromission.” Source: RevenueBase Database · checked Sep 29, 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: secure software development 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 secure software development consulting companies.
Partial evidence: Its own public description names part of secure software development consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name secure software development 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 336 secure software development consulting companies based in France

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Secure software development consulting companies based in France at a glance

As of Sep 29, 2026

33.7%Verified-email coverage

10.2Average contacts per company

1-10Median size (employees)

30.1%Largest-city concentration · Paris

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

244

11-50

51-200

201-500

501-1,000

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 336 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 secure software development 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 “secure software development 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 secure software development 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 secure software development 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, 1,156 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 29, 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.

Secure software development consulting companies by metro

Secure software development consulting companies in Paris101

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 secure software development 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 secure software development consulting companies are there based in France?

RevenueBase identified 336 secure software development 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?

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

Which city has the most secure software development consulting companies?

Paris leads with 101 headquartered companies, followed by Lyon (15) and Toulouse (9).

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 1,156 verified decision-maker contacts tracked across these 336 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 29, 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.