Company lists · Data refreshed September 2026

Top 25 Federal systems integrators based in France

Name: Federal systems integrators based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 239 companies tracked

RevenueBase identified 239 federal systems integrators headquartered in France as of September 2026 and tracks 9,800 professional contacts across them, including 3,936 with verified work emails. Paris is the largest hub.

This list covers federal systems integrators 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

239Companies

9,800Contacts tracked

3,936Verified emails

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The 25 largest federal systems integrators based in France

Ranked by team size

Top 25 of 239 federal systems integrators 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 federal systems integrators: 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	CS Group	Indirect evidence	Le Plessis Robinson, FranceHQ checked Sep 21, 2026	5,001-10,000	2,092 contacts →
	Indirect evidence “Expert des systèmes critiques Conception, réalisation, déploiement & maintenance de systèmes critiques, basés sur des solutions et des produits innovants, garantissant…” Source: RevenueBase Database · checked Sep 21, 2026
2	Consort Group	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	1,001-5,000	1,704 contacts →
	Indirect evidence “Acteur de référence des systèmes d’information augmentés par l’intégration stratégique de la data, Consort Group accompagne les entreprises pour leur permettre de valoriser ce…” Source: RevenueBase Database · checked Sep 21, 2026
3	Tenexa	Indirect evidence	Roissy Cdg Cedex, FranceHQ checked Sep 21, 2026	1,001-5,000	551 contacts →
	Indirect evidence “Fondée en 1985, Tenexa est une Entreprise de services du numérique (ESN), Le groupe Tenexa est composé de deux filiales (Infodis IT, & Prolival) et se positionne résolument vers…” Source: RevenueBase Database · checked Sep 21, 2026
4	DCS Easyware	Indirect evidence	Lyon, FranceHQ checked Sep 21, 2026	1,001-5,000	532 contacts →
	Indirect evidence “Filiale du Groupe SYNERGIE, DCS SYNERGIE GROUP capitalise sur son histoire pour accompagner chaque jour les enjeux IT de ses clients.” Source: RevenueBase Database · checked Sep 21, 2026
5	Metsys	Indirect evidence	Boulogne-billancourt, FranceHQ checked Sep 21, 2026	501-1,000	397 contacts →
	Indirect evidence “Metsys est un intégrateur de solutions de cybersécurité, d’infrastructure et de cloud.” Source: RevenueBase Database · checked Sep 21, 2026
6	Cyllene	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	201-500	279 contacts →
	Indirect evidence “Chez Cyllene, on couvre le spectre complet de votre besoin en termes de : Conseils 🧬 Définition d’architectures Hébergement & Services managés Cybersécurité & Formations…” Source: RevenueBase Database · checked Sep 21, 2026
7	Stanley Security France	Indirect evidence	Ivry-sur-seine, FranceHQ checked Sep 21, 2026	1,001-5,000	191 contacts →
	Indirect evidence “STANLEY Security est devenu Securitas Technology en 2022.” Source: RevenueBase Database · checked Sep 21, 2026
8	Acelys Services Numériques	Indirect evidence	Montpellier, FranceHQ checked Sep 21, 2026	51-200	169 contacts →
	Indirect evidence “Créée en 1997, Acelys Services Numériques est une entreprise de services numériques (ESN) basée en Occitanie.” Source: RevenueBase Database · checked Sep 21, 2026
9	C2c	Indirect evidence	Roissy En France, FranceHQ checked Sep 21, 2026	51-200	167 contacts →
	Indirect evidence “C2C est un intégrateur spécialisé dans les systèmes de communication Réseau IP couvrant les domaines des Infrastructures de câblage, le Wireless, les solutions de Vidéo Protection…” Source: RevenueBase Database · checked Sep 21, 2026
10	Rs2i	Indirect evidence	Levallois-perret, FranceHQ checked Sep 21, 2026	51-200	144 contacts →
	Indirect evidence “Chez RS2i, nous avons à cœur de réaliser votre transformation digitale, et ce, grâce à notre expertise acquise de longue date.” Source: RevenueBase Database · checked Sep 21, 2026
11	Labsoft	Indirect evidence	Labège, FranceHQ checked Sep 21, 2026	51-200	132 contacts →
	Indirect evidence “Labsoft SSII accompagne des grands comptes régionaux et national ainsi que des PME PMI.” Source: RevenueBase Database · checked Sep 21, 2026
12	Mismo Informatique	Indirect evidence	La Chapelle Sur Erdre, FranceHQ checked Sep 21, 2026	51-200	110 contacts →
	Indirect evidence “Mismo, Forget Technology Mismo propose une offre complète en solutions de gestion, d'infrastructure et matériels informatiques.” Source: RevenueBase Database · checked Sep 21, 2026
13	Apilog Automation	Indirect evidence	Massy, FranceHQ checked Sep 21, 2026	51-200	96 contacts →
	Indirect evidence “APILOG Automation, filiale de GCC Energie, est un intégrateur en courants faibles, supervision, automatismes et sûreté pour les bâtiments.” Source: RevenueBase Database · checked Sep 21, 2026
14	Lutessa	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	51-200	83 contacts →
	Indirect evidence “Allez, on se présente!” Source: RevenueBase Database · checked Sep 21, 2026
15	Isitix	Indirect evidence	FranceHQ checked Sep 21, 2026	n/a	83 contacts →
	Indirect evidence “Depuis 20 ans, Isitix accompagne vos projets informatiques et numériques.” Source: RevenueBase Database · checked Sep 21, 2026
16	Celios	Indirect evidence	Limoges, FranceHQ checked Sep 21, 2026	51-200	72 contacts →
	Indirect evidence “Celios : l'expertise globale IT avec ses services intégrés en infogérance, cybersécurité, innovation technologique et gestion de talents spécialisés.” Source: RevenueBase Database · checked Sep 21, 2026
17	Attineos Infrastructures	Indirect evidence	Mont-saint-aignan, FranceHQ checked Sep 21, 2026	51-200	69 contacts →
	Indirect evidence “Attineos Infrastructures est une jeune ESN, spécialisée dans les Systèmes & Réseaux informatiques.” Source: RevenueBase Database · checked Sep 21, 2026
18	Access Group	Indirect evidence	Annecy, FranceHQ checked Sep 21, 2026	51-200	56 contacts →
	Indirect evidence “Bienvenue chez Access Group, pôle d'expertises numériques d'Eiffage Energie Systèmes en région Auvergne Rhône-Alpes.” Source: RevenueBase Database · checked Sep 21, 2026
19	IT Systemes	Indirect evidence	Malakoff, FranceHQ checked Sep 21, 2026	11-50	52 contacts →
	Indirect evidence “Votre logiciel métier devrait vous appartenir.” Source: RevenueBase Database · checked Sep 21, 2026
20	Naitways	Indirect evidence	Boulogne-billancourt, FranceHQ checked Sep 21, 2026	51-200	49 contacts →
	Indirect evidence “IT infrastructures expert, Naitways is a French tailored IT solutions company, with value-added services and high levels of contractual services.” Source: RevenueBase Database · checked Sep 21, 2026
21	CONIX	Indirect evidence	Paris, FranceHQ checked Sep 21, 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 21, 2026
22	Atémis	Indirect evidence	La Chapelle Sur Erdre, FranceHQ checked Sep 21, 2026	11-50	49 contacts →
	Indirect evidence “Depuis plus de 25 ans, ATÉMIS accompagne les entreprises dans la conception, le déploiement et la sécurisation de leurs infrastructures informatiques.” Source: RevenueBase Database · checked Sep 21, 2026
23	TDS By Nomios Cyber, Network & Security Talent Profiler	Indirect evidence	Issy-les-moulineaux, FranceHQ checked Sep 21, 2026	11-50	48 contacts →
	Indirect evidence “Créée en 2018 par Mohamed Tliba, c’est en septembre 2020 qu’une nouvelle aventure commence pour TDS Global Technologies avec l’arrivée de Valentine Lorenzi et Emmanuel Kapferer.” Source: RevenueBase Database · checked Sep 21, 2026
24	Redopus	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	11-50	47 contacts →
	Indirect evidence “Créé en 2017, REDOPUS est spécialisée en sécurité, réseaux des systèmes d'informations.” Source: RevenueBase Database · checked Sep 21, 2026
25	ELSIA	Indirect evidence	La Verrière, FranceHQ checked Sep 21, 2026	51-200	46 contacts →
	Indirect evidence “ELSIA est un intégrateur spécialisé dans la conception, l'installation et la maintenance de systèmes de sécurité dédiés aux bâtiments - Sécurité incendie - Vidéo protection -…” 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: federal systems integrators. 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 federal systems integrators.
Partial evidence: Its own public description names part of federal systems integrators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name federal systems integrators. 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 239 federal systems integrators based in France

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Federal systems integrators based in France at a glance

As of Sep 21, 2026

40.2%Verified-email coverage

41.0Average contacts per company

11-50Median size (employees)

14.6%Largest-city concentration · Paris

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

101

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 239 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 federal systems integrators, 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 “federal systems integrators”. 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 federal systems integrators), 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 federal systems integrators, 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, 3,936 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.

Federal systems integrators by metro

Federal systems integrators 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 federal systems integrators, 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 federal systems integrators are there based in France?

RevenueBase identified 239 federal systems integrators 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?

CS Group, headquartered in Le Plessis Robinson, tops this list with the largest team on record.

Which city has the most federal systems integrators?

Paris leads with 35 headquartered companies, followed by Boulogne-Billancourt (8) and Lyon (7).

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 3,936 verified decision-maker contacts tracked across these 239 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.