Company lists · Data refreshed September 2026

Top 25 IT infrastructure modernization companies based in France

Name: IT infrastructure modernization companies based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 448 companies tracked

RevenueBase identified 448 IT infrastructure modernization companies headquartered in France as of September 2026 and tracks 10,573 professional contacts across them, including 3,671 with verified work emails. Paris is the largest hub.

This list covers IT infrastructure modernization 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 20, 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 20, 2026 86% judged on-target in blind review

448Companies

10,573Contacts tracked

3,671Verified emails

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The 25 largest IT infrastructure modernization companies based in France

Ranked by team size

Top 25 of 448 IT infrastructure modernization companies based in France, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to IT infrastructure modernization 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	Acensi	Indirect evidence	Courbevoie, FranceHQ checked Sep 20, 2026	1,001-5,000	844 contacts →
	Indirect evidence “You will be part of ACENSI network: 1650 co-workers involved in IS transformation projects at our clients through our multisectoral expertise.” Source: RevenueBase Database · checked Sep 20, 2026
2	Klanik	Partial evidence	Marseille, FranceHQ checked Sep 20, 2026	501-1,000	585 contacts →
	Partial evidence “KLANIK is a consulting company specialized in IT Engineering which accompanies its partners in their digital and technological projects.” Source: RevenueBase Database · checked Sep 20, 2026
3	DCS Easyware	Partial evidence	Lyon, FranceHQ checked Sep 20, 2026	1,001-5,000	532 contacts →
	Partial 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 20, 2026
4	Devoteam Google Cloud Partner	Indirect evidence	Levallois-perret, FranceHQ checked Sep 20, 2026	501-1,000	528 contacts →
	Indirect evidence “Devoteam is a Diamond Tier Partner in the Google Cloud Services Partner Path and a Managed Services Provider.” Source: RevenueBase Database · checked Sep 20, 2026
5	ITS Group S.A	Indirect evidence	Boulogne-billancourt, FranceHQ checked Sep 20, 2026	1,001-5,000	342 contacts →
	Indirect evidence “For over 20 years, ITS Group has supported companies in their digital transformation projects thanks to the strength of its specialized areas of expertise.” Source: RevenueBase Database · checked Sep 20, 2026
6	Cyllene	Indirect evidence	Paris, FranceHQ checked Sep 20, 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 20, 2026
7	Ozitem	Indirect evidence	Levallois-perret, FranceHQ checked Sep 20, 2026	201-500	252 contacts →
	Indirect evidence “Ozitem supports its customers so that innovation punctuates their daily lives.” Source: RevenueBase Database · checked Sep 20, 2026
8	Acelys Services Numériques	Indirect evidence	Montpellier, FranceHQ checked Sep 20, 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 20, 2026
9	Adservio	Indirect evidence	Puteaux, FranceHQ checked Sep 20, 2026	201-500	161 contacts →
	Indirect evidence “We build a resilient digital experience.” Source: RevenueBase Database · checked Sep 20, 2026
10	Reactis Group	Partial evidence	Aix-en-provence Cedex 3, FranceHQ checked Sep 20, 2026	201-500	145 contacts →
	Partial evidence “Nous sommes une ESN qui accompagne les entreprises dans leurs projets IT grâce à des modes d'intervention flexibles : Assistance Technique Unitaire (ATU), Assistance Technique…” Source: RevenueBase Database · checked Sep 20, 2026
11	Labsoft	Indirect evidence	Labège, FranceHQ checked Sep 20, 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 20, 2026
12	Artemys Normandie Groupe Artemys	Indirect evidence	Isneauville, FranceHQ checked Sep 20, 2026	501-1,000	130 contacts →
	Indirect evidence “Le respect, la solidarité, l’éthique et la convivialité constituent le socle de nos valeurs.” Source: RevenueBase Database · checked Sep 20, 2026
13	Abicom	Indirect evidence	Aubiere, FranceHQ checked Sep 20, 2026	51-200	122 contacts →
	Indirect evidence “Avec plus de 155 experts, Abicom Groupe OCI est le partenaire informatique de tous les professionnels.” Source: RevenueBase Database · checked Sep 20, 2026
14	Groupe Saph	Indirect evidence	Biot, FranceHQ checked Sep 20, 2026	51-200	118 contacts →
	Indirect evidence “Télétravail, migration des applications de l’entreprise vers le Cloud, augmentation des risques de cyberattaque; dans le contexte actuel, les entreprises doivent faire évoluer…” Source: RevenueBase Database · checked Sep 20, 2026
15	Team-It	Indirect evidence	Aix-en-provence, FranceHQ checked Sep 20, 2026	51-200	115 contacts →
	Indirect evidence “Mais qui sommes-nous?” Source: RevenueBase Database · checked Sep 20, 2026
16	Mismo Informatique	Partial evidence	La Chapelle Sur Erdre, FranceHQ checked Sep 20, 2026	51-200	110 contacts →
	Partial evidence “Mismo, Forget Technology Mismo propose une offre complète en solutions de gestion, d'infrastructure et matériels informatiques.” Source: RevenueBase Database · checked Sep 20, 2026
17	Ava6	Partial evidence	Limonest, FranceHQ checked Sep 20, 2026	51-200	109 contacts →
	Partial evidence “AVA6 est une ESN dont les domaines de compétences sont l'infrastructure, systèmes et réseaux, hébergement.” Source: RevenueBase Database · checked Sep 20, 2026
18	Reel IT Groupe	Strong evidence	Aix En Provence, FranceHQ checked Sep 20, 2026	201-500	107 contacts →
	Strong evidence “Reel IT est un des leaders en matière d'innovation numérique dans les domaines de l’infrastructure, du cloud, de la cybersécurité, de la data et de l’IA, répartis en pôles…” Source: RevenueBase Database · checked Sep 20, 2026
19	Sys1	Indirect evidence	Saint-jean-d'illac, FranceHQ checked Sep 20, 2026	51-200	100 contacts →
	Indirect evidence “SYS1 est présent à Bordeaux en Nouvelle Aquitaine ainsi qu'en Occitanie et PACA avec son agence de Montpellier pour adresser les sujets ci dessous : ACTIVITÉS PRINCIPALES Étude…” Source: RevenueBase Database · checked Sep 20, 2026
20	Novahé	Indirect evidence	Saint Cloud Cedex, FranceHQ checked Sep 20, 2026	51-200	92 contacts →
	Indirect evidence “En 2018, AS-PC, EVEA TECHNOLOGY et INETD CONSULTING deviennent NOVAHE < Novahé accompagne les ETIs et les Grands Comptes dans l’optimisation et l’urbanisation de leur Système…” Source: RevenueBase Database · checked Sep 20, 2026
21	Lutessa	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	51-200	83 contacts →
	Indirect evidence “Allez, on se présente!” Source: RevenueBase Database · checked Sep 20, 2026
22	Vaganet	Indirect evidence	Velizy-villacoublay, FranceHQ checked Sep 20, 2026	51-200	79 contacts →
	Indirect evidence “Pionnier du delivery agile depuis 2014, VAGANET met à disposition de ses clients des expertises techniques et fonctionnelles spécialisées dans la transformation et l’actualisation…” Source: RevenueBase Database · checked Sep 20, 2026
23	PI Services	Indirect evidence	Noisy Le Grand, FranceHQ checked Sep 20, 2026	51-200	78 contacts →
	Indirect evidence “Nous sommes une entreprise de Services du Numérique (ESN), spécialisée dans les plateformes d’entreprise Microsoft, créée depuis plus de 20 ans.” Source: RevenueBase Database · checked Sep 20, 2026
24	Deletec	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	51-200	77 contacts →
	Indirect evidence “DELETEC Corporate, Société de Services en Ingénierie Informatique, aborde le monde des hautes technologies avec un esprit d'enthousiasme et de passion qui caractérise ses équipes…” Source: RevenueBase Database · checked Sep 20, 2026
25	Attineos Infrastructures	Partial evidence	Mont-saint-aignan, FranceHQ checked Sep 20, 2026	51-200	69 contacts →
	Partial evidence “Attineos Infrastructures est une jeune ESN, spécialisée dans les Systèmes & Réseaux informatiques.” Source: RevenueBase Database · checked Sep 20, 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: IT infrastructure modernization 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 IT infrastructure modernization companies.
Partial evidence: Its own public description names part of IT infrastructure modernization companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT infrastructure modernization 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 448 IT infrastructure modernization companies based in France

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IT infrastructure modernization companies based in France at a glance

As of Sep 20, 2026

34.7%Verified-email coverage

23.6Average contacts per company

1-10Median size (employees)

23.0%Largest-city concentration · Paris

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

246

11-50

126

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 448 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 IT infrastructure modernization 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 “IT infrastructure modernization 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 IT infrastructure modernization 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 IT infrastructure modernization 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, 3,671 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 20, 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.

IT infrastructure modernization companies by metro

IT infrastructure modernization companies in Paris103

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 IT infrastructure modernization 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 IT infrastructure modernization companies are there based in France?

RevenueBase identified 448 IT infrastructure modernization 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?

Acensi, headquartered in Courbevoie, tops this list with the largest team on record.

Which city has the most IT infrastructure modernization companies?

Paris leads with 103 headquartered companies, followed by Lyon (17) and Boulogne-Billancourt (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 3,671 verified decision-maker contacts tracked across these 448 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 20, 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.