Company lists · Data refreshed November 2026

Top 23 Legacy system integration companies based in France

RevenueBase identified 256 company matches for legacy system integration companies associated with France as of November 2026 and tracks 8,687 professional contacts across them, including 4,598 with verified work emails. Paris is the largest hub.

This list covers company matches for legacy system integration companies associated with France, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
256Companies
8,687Contacts tracked
4,598Verified emails
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The 23 largest legacy system integration companies based in France

Ranked by team size
Top 23 of 256 company matches for legacy system integration companies based in France, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchNeuilly-sur-seine, FranceHQ recorded Nov 6, 20261,001-5,0001,842 contacts →

Exact match

“Infotel accompagne les directions Informatiques et Métiers des grandes entreprises depuis 45 ans (Airbus, Air France, PSA, BNP Paribas, Banque de France ou encore BPCE, etc.).”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchAix-en-provence, FranceHQ recorded Nov 6, 2026201-500420 contacts →

Exact match

“KPC se positionne comme un acteur global capable d’intervenir aussi bien sur des phases amonts (AMOA) que sur des phases d’intégration de logiciels (AMOE): Conseil et Services…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchLevallois-perret, FranceHQ recorded Nov 6, 202651-200149 contacts →

Exact match

“Chez RS2i, nous avons à cœur de réaliser votre transformation digitale, et ce, grâce à notre expertise acquise de longue date.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchLabège, FranceHQ recorded Nov 6, 202651-200146 contacts →

Exact match

“Labsoft SSII accompagne des grands comptes régionaux et national ainsi que des PME PMI.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchL'isle D'espagnac, FranceHQ recorded Nov 6, 202651-20088 contacts →

Exact match

“Novenci accompagne ses clients dans les domaines suivants - Conception de solutions techniques pour l’évolution de votre système d’information - Fourniture d’infrastructures…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchLannion, FranceHQ recorded Nov 6, 2026n/a83 contacts →

Exact match

“Depuis 20 ans, Isitix accompagne vos projets informatiques et numériques.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchLyon, FranceHQ recorded Nov 6, 202651-20072 contacts →

Exact match

“L'entreprise Axopen propose toute une gamme de produits et services informatique allant du conseil en système d'informations, développement de solutions sur mesure ou intégration…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchMont-saint-aignan, FranceHQ recorded Nov 6, 202651-20072 contacts →

Exact match

“Attineos Infrastructures est une jeune ESN, spécialisée dans les Systèmes & Réseaux informatiques.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchLyon, FranceHQ recorded Nov 6, 202651-20068 contacts →

Exact match

“FOKUS, où l’Humain et la Technologie se rencontrent.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchLevallois-perret, FranceHQ recorded Nov 6, 202611-5062 contacts →

Exact match

“Partenaire de la transformation digitale des entreprises, Komposite est l’architecte de la modernisation des infrastructures IT, fournisseur de services Cloud hybrides, et expert…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchSoultz-haut-rhin, FranceHQ recorded Nov 6, 202611-5047 contacts →

Exact match

“Simplify your IT projects and accelerate your digital transformation Whether it’s migrating to an ERP system, optimizing your IT infrastructure, or managing data flows… these are…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchBoulogne-billancourt, FranceHQ recorded Nov 6, 202651-20047 contacts →

Exact match

“IT infrastructures expert, Naitways is a French tailored IT solutions company, with value-added services and high levels of contractual services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchValence, FranceHQ recorded Nov 6, 202611-5047 contacts →

Exact match

“Chez Elipce Solutions, nous concevons, déployons et maintenons des solutions logicielles adaptées à vos enjeux spécifiques, qu'il s'agisse d'outils internes dans tous les…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchRennes, FranceHQ recorded Nov 6, 202651-20046 contacts →

Exact match

“SpikeeLabs travaille auprès de ses clients sur la conception et la réalisation de leur système d’information.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchMoûtiers, FranceHQ recorded Nov 6, 2026n/a45 contacts →

Exact match

“STH, intégrateur informatique et Télécom vous accompagne depuis 20 ans sur vos déploiements, migrations et la disponibilité de vos infrastructures.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchParis, FranceHQ recorded Nov 6, 202611-5044 contacts →

Exact match

“Systemic, one of the first integrators of DELL Technologies in France, supports large companies in the study, recommendation, implementation and monitoring of their information…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchBezannes, FranceHQ recorded Nov 6, 202611-5039 contacts →

Exact match

“Expert EDI depuis + de 10 ans Plateforme Agréée Hubtimize e-Invoicing Chez EsaLink, nous accompagnons les entreprises dans la digitalisation, l’automatisation et la conformité de…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact match69002, FranceHQ recorded Nov 6, 202651-20037 contacts →

Exact match

“Move Solutions is an IT services company specialized in development and transformation of information systems : Data Migration, Modernization and Maintenance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchMalakoff, FranceHQ recorded Nov 6, 202651-20036 contacts →

Exact match

“Created in INFIDIS - Digital Services Company - is an integrator of technologies and services with high added value in IT.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchNantes, FranceHQ recorded Nov 6, 202611-5034 contacts →

Exact match

“SAP solutions integrator”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchValence, FranceHQ recorded Nov 6, 202611-5032 contacts →

Exact match

“Société de conseil informatique, ATM Consulting vous accompagne dans vos projets d'organisation et de modernisation de votre système d'information.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchNeuilly Sur Seine, FranceHQ recorded Nov 6, 202611-5029 contacts →

Exact match

“Camondo Consulting est un cabinet de conseil et d’intégration SI à taille humaine de 40 personnes fondé en 2013.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchCourbevoie, FranceHQ recorded Nov 6, 202611-5029 contacts →

Exact match

“NEAPSYS est une société experte et indépendante dans le conseil IT, nos consultants développent pour nos clients des solutions digitales sur mesures et maîtrisent l’intégration…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 23 of 256 legacy system integration companies based in France

See the full list, filter by size, metro and specialty, and access 4,598 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Legacy system integration companies based in France at a glance

As of Nov 6, 2026
52.9%Verified-email coverage
33.9Average contacts per company
1-10Median size (employees)
21.9%Largest-city concentration · Paris
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
133
11-50
85
51-200
32
201-500
3
1,001-5,000
3

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 256 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with France whose business descriptions match “legacy system integration companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 4,598 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Legacy system integration companies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “legacy system integration companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many legacy system integration companies are there based in France?

RevenueBase identified 256 company matches for legacy system integration companies associated with France as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Infotel tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most legacy system integration companies?

Paris leads with 56 company records, followed by Lyon (13) and Courbevoie (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 4,598 professional contacts with verified work emails tracked across these 256 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.