Company lists · Data refreshed September 2026
Top 25 Legacy system modernization firms based in France
RevenueBase identified 1,263 company matches for legacy system modernization firms associated with France as of September 2026 and tracks 80,045 professional contacts across them, including 31,929 with verified work emails. Paris is the largest hub.
This list covers company matches for legacy system modernization firms 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 September 20, 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.
The 25 largest legacy system modernization firms based in France
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 36,960 contacts → | ||||
Exact match “Sopra Steria, a major Tech player in Europe with employees in nearly 30 countries, is recognised for its consulting, digital services and solutions.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 2 | 6,190 contacts → | ||||
Exact match “Wavestone is a leading consulting firm operating at the intersection of business and technology.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 3 | 4,928 contacts → | ||||
Exact match “Le groupe SII est une société d’ingénierie et de conseil en technologies (ICT) et une entreprise de services numériques (ESN) créée en 1979 par Bernard HUVÉ, ingénieur de…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 4 | 1,964 contacts → | ||||
Exact match “At Keyrus, we help organizations move from experimental AI to industrialized AI, from isolated agents to orchestrated systems, and from insight to execution.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 5 | 1,735 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 · Sep 20, 2026 · View company records in RevenueBase | |||||
| 6 | 1,394 contacts → | ||||
Exact match “At Prodware, we believe that Trust, Audacity, and Passion are the driving forces behind meaningful digital transformation.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 7 | 1,256 contacts → | ||||
Exact match “Créée en septembre 2001, Niji est une société de conseil, de design et de mise en œuvre technologique, entièrement dédiée à la transformation numérique des entreprises et des…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 8 | 844 contacts → | ||||
Exact match “You will be part of ACENSI network: 1650 co-workers involved in IS transformation projects at our clients through our multisectoral expertise.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 9 | 585 contacts → | ||||
Exact match “KLANIK is a consulting company specialized in IT Engineering which accompanies its partners in their digital and technological projects.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 10 | 574 contacts → | ||||
Exact match “Alteca is a French IT & Digital services company created in 1996.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 11 | 532 contacts → | ||||
Exact match “Filiale du Groupe SYNERGIE, DCS SYNERGIE GROUP capitalise sur son histoire pour accompagner chaque jour les enjeux IT de ses clients.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 12 | 510 contacts → | ||||
Exact match “USING OUR COLLECTIVE ENERGY FOR POSITIVE TECHNOLOGY Ippon is a consulting and expertise firm, who is convinced that technology is a source of progress for society.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 13 | 430 contacts → | ||||
Exact match “Zenika is an IT consulting firm with 550 employees that helps companies with their digital transformation.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 14 | 417 contacts → | ||||
Exact match “Digital transformation company, business and technology consulting, Audensiel supports its clients in all business sectors in France and abroad in the following areas- Digital…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 15 | 342 contacts → | ||||
Exact match “For over 20 years, ITS Group has supported companies in their digital transformation projects thanks to the strength of its specialized areas of expertise.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 16 | 331 contacts → | ||||
Exact match “Together, aiming higher and going further to unlock your potential.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 17 | 314 contacts → | ||||
Exact match “Bienvenue chez Amiltone.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 18 | 313 contacts → | ||||
Exact match “Inside est une société de conseil et de services numériques qui simplifie et accélère la transformation des entreprises, de la stratégie à la mise en œuvre, avec un objectif clair…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 19 | 279 contacts → | ||||
Exact match “Chez Cyllene, on couvre le spectre complet de votre besoin en termes de : Conseils 🧬 Définition d’architectures Hébergement & Services managés Cybersécurité & Formations…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 20 | 252 contacts → | ||||
Exact match “Fondée en 2017, Ouidou est une entreprise de services du numérique regroupant plus de 250 collaborateurs.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 21 | 236 contacts → | ||||
Exact match “A Theodo, toute notre énergie est tournée vers la satisfaction de nos clients.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 22 | 204 contacts → | ||||
Exact match “Société du groupe Neurones, AS International Group soutient les entreprises dans leur transformation digitale en proposant des solutions informatiques innovantes.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 23 | 198 contacts → | ||||
Exact match “Chez SYD, nous accompagnons depuis plus de 25 ans les entreprises : TPE, PME et grands comptes, tous secteurs confondus dans leur accélération digitale.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 24 | 198 contacts → | ||||
Exact match “Oxyl Groupe | L’humain au cœur de la technologie Chez Oxyl Groupe, nous accompagnons les entreprises dans leurs transformations digitales avec une conviction simple : la…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 25 | 178 contacts → | ||||
Exact match “Wemanity Reply is a consulting and delivery firm specialized in technological, organizational, and cultural transformation.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “legacy system modernization firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 1,263 legacy system modernization firms based in France
See the full list, filter by size, metro and specialty, and access 31,929 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Legacy system modernization firms based in France at a glance
As of Sep 20, 2026Companies by employee count
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 1,263 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 modernization firms” 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 31,929 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 September 20, 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 modernization firms 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 modernization firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many legacy system modernization firms are there based in France?
RevenueBase identified 1,263 company matches for legacy system modernization firms associated with France as of September 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?
Sopra Steria tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most legacy system modernization firms?
Paris leads with 396 company records, followed by Lyon (44) and Lille (22).
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 31,929 professional contacts with verified work emails tracked across these 1,263 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 September 20, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,263 legacy system modernization firms based in France. Start with a free account, no credit card.
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Legacy system modernization firms by geography
- Legacy system modernization firms based in Buenos Aires, Argentina
- Legacy system modernization firms based in Brisbane, Australia
- Legacy system modernization firms based in Melbourne, Australia
- Legacy system modernization firms based in Perth, Australia
- Legacy system modernization firms based in Sydney, Australia
- Legacy system modernization firms based in Dhaka, Bangladesh
- Legacy system modernization firms based in Barueri, Brazil
- Legacy system modernization firms based in Belo Horizonte, Brazil
- Legacy system modernization firms based in Campinas, Brazil
- Legacy system modernization firms based in Curitiba, Brazil
- Legacy system modernization firms based in Rio De Janeiro, Brazil
- Legacy system modernization firms based in Sao Paulo, Brazil
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.
More company lists
- All company lists
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- Lists A-Z
- New lists
- Legacy system modernization firms based in Buenos Aires, Argentina
- Legacy system modernization firms based in Brisbane, Australia
- Legacy system modernization firms based in Melbourne, Australia
- Legacy system modernization firms based in Perth, Australia
- Legacy system modernization firms based in Sydney, Australia
- Legacy system modernization firms based in Dhaka, Bangladesh
Company intelligence · public preview
Top 25 legacy system modernization firms based in France
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 1,263 matching company records for legacy system modernization firms based in France, with 80,045 tracked contacts and 31,929 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 20, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 legacy system modernization firms based in France
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Sopra Steriasoprasteria.comHQ: Paris, FranceReported employees: 10001+ | Paris, France | 10001+ | Exact match | 36,960 contacts → |
“Sopra Steria, a major Tech player in Europe with employees in nearly 30 countries, is recognised for its consulting, digital services and solutions.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Wavestonewavestone.comHQ: 100-101 Terrasse Boieldieu, FranceReported employees: 1,001-5,000 | 100-101 Terrasse Boieldieu, France | 1,001-5,000 | Exact match | 6,190 contacts → |
“Wavestone is a leading consulting firm operating at the intersection of business and technology.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Groupe SIIsii-group.comHQ: Paris, FranceReported employees: 10001+ | Paris, France | 10001+ | Exact match | 4,928 contacts → |
“Le groupe SII est une société d’ingénierie et de conseil en technologies (ICT) et une entreprise de services numériques (ESN) créée en 1979 par Bernard HUVÉ, ingénieur de…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Keyruskeyrus.comHQ: Levallois-perret, FranceReported employees: 1,001-5,000 | Levallois-perret, France | 1,001-5,000 | Exact match | 1,964 contacts → |
“At Keyrus, we help organizations move from experimental AI to industrialized AI, from isolated agents to orchestrated systems, and from insight to execution.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Infotelinfotel.comHQ: Neuilly-sur-seine, FranceReported employees: 1,001-5,000 | Neuilly-sur-seine, France | 1,001-5,000 | Exact match | 1,735 contacts → |
“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 description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Prodwareprodwaregroup.comHQ: Paris, FranceReported employees: 1,001-5,000 | Paris, France | 1,001-5,000 | Exact match | 1,394 contacts → |
“At Prodware, we believe that Trust, Audacity, and Passion are the driving forces behind meaningful digital transformation.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  NIJIniji.frHQ: Issy-les-moulineaux, FranceReported employees: 1,001-5,000 | Issy-les-moulineaux, France | 1,001-5,000 | Exact match | 1,256 contacts → |
“Créée en septembre 2001, Niji est une société de conseil, de design et de mise en œuvre technologique, entièrement dédiée à la transformation numérique des entreprises et des…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Acensiacensi.frHQ: Courbevoie, FranceReported employees: 1,001-5,000 | Courbevoie, France | 1,001-5,000 | Exact match | 844 contacts → |
“You will be part of ACENSI network: 1650 co-workers involved in IS transformation projects at our clients through our multisectoral expertise.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Klanikklanik.comHQ: Marseille, FranceReported employees: 501-1,000 | Marseille, France | 501-1,000 | Exact match | 585 contacts → |
“KLANIK is a consulting company specialized in IT Engineering which accompanies its partners in their digital and technological projects.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Altecaalteca.frHQ: Villeurbanne, FranceReported employees: 501-1,000 | Villeurbanne, France | 501-1,000 | Exact match | 574 contacts → |
“Alteca is a French IT & Digital services company created in 1996.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  DCS Easywaredcsit-group.comHQ: Lyon, FranceReported employees: 1,001-5,000 | Lyon, France | 1,001-5,000 | Exact match | 532 contacts → |
“Filiale du Groupe SYNERGIE, DCS SYNERGIE GROUP capitalise sur son histoire pour accompagner chaque jour les enjeux IT de ses clients.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Ippon Technologiesippon.techHQ: Paris, FranceReported employees: 201-500 | Paris, France | 201-500 | Exact match | 510 contacts → |
“USING OUR COLLECTIVE ENERGY FOR POSITIVE TECHNOLOGY Ippon is a consulting and expertise firm, who is convinced that technology is a source of progress for society.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Zenikazenika.comHQ: Paris, FranceReported employees: 501-1,000 | Paris, France | 501-1,000 | Exact match | 430 contacts → |
“Zenika is an IT consulting firm with 550 employees that helps companies with their digital transformation.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Audensielaudensiel.comHQ: Boulogne-billancourt, FranceReported employees: 1,001-5,000 | Boulogne-billancourt, France | 1,001-5,000 | Exact match | 417 contacts → |
“Digital transformation company, business and technology consulting, Audensiel supports its clients in all business sectors in France and abroad in the following areas- Digital…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  ITS Group S.Aitsgroup.comHQ: Boulogne-billancourt, FranceReported employees: 1,001-5,000 | Boulogne-billancourt, France | 1,001-5,000 | Exact match | 342 contacts → |
“For over 20 years, ITS Group has supported companies in their digital transformation projects thanks to the strength of its specialized areas of expertise.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  LÙKLAluklagroup.comHQ: Paris, FranceReported employees: 501-1,000 | Paris, France | 501-1,000 | Exact match | 331 contacts → |
“Together, aiming higher and going further to unlock your potential.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Amiltoneamiltone.comHQ: Villeurbanne, FranceReported employees: 201-500 | Villeurbanne, France | 201-500 | Exact match | 314 contacts → |
“Bienvenue chez Amiltone.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Insideinsidegroup.frHQ: Toulouse, FranceReported employees: 201-500 | Toulouse, France | 201-500 | Exact match | 313 contacts → |
“Inside est une société de conseil et de services numériques qui simplifie et accélère la transformation des entreprises, de la stratégie à la mise en œuvre, avec un objectif clair…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Cyllenegroupe-cyllene.comHQ: Paris, FranceReported employees: 201-500 | Paris, France | 201-500 | Exact match | 279 contacts → |
“Chez Cyllene, on couvre le spectre complet de votre besoin en termes de : Conseils 🧬 Définition d’architectures Hébergement & Services managés Cybersécurité & Formations…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Ouidououidou.frHQ: Paris, FranceReported employees: 201-500 | Paris, France | 201-500 | Exact match | 252 contacts → |
“Fondée en 2017, Ouidou est une entreprise de services du numérique regroupant plus de 250 collaborateurs.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Theodotheodo.frHQ: Paris, FranceReported employees: 501-1,000 | Paris, France | 501-1,000 | Exact match | 236 contacts → |
“A Theodo, toute notre énergie est tournée vers la satisfaction de nos clients.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  AS International Groupasinter-group.comHQ: Paris, FranceReported employees: 501-1,000 | Paris, France | 501-1,000 | Exact match | 204 contacts → |
“Société du groupe Neurones, AS International Group soutient les entreprises dans leur transformation digitale en proposant des solutions informatiques innovantes.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Groupe SYDsyd.frHQ: Saint Herblain, FranceReported employees: 201-500 | Saint Herblain, France | 201-500 | Exact match | 198 contacts → |
“Chez SYD, nous accompagnons depuis plus de 25 ans les entreprises : TPE, PME et grands comptes, tous secteurs confondus dans leur accélération digitale.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  OXYLoxyl.frHQ: Arcueil, FranceReported employees: 51-200 | Arcueil, France | 51-200 | Exact match | 198 contacts → |
“Oxyl Groupe | L’humain au cœur de la technologie Chez Oxyl Groupe, nous accompagnons les entreprises dans leurs transformations digitales avec une conviction simple : la…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Wemanity Reply Pariswemanityreply.comHQ: Paris, FranceReported employees: 201-500 | Paris, France | 201-500 | Exact match | 178 contacts → |
“Wemanity Reply is a consulting and delivery firm specialized in technological, organizational, and cultural transformation.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,263 company matches
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Legacy system modernization firms: dataset insights
September 20, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,261 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,263 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 20, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Legacy system modernization firms by metro
Questions about this company list
What does Exact match mean for legacy system modernization firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many legacy system modernization firms did RevenueBase find based in France?
The saved snapshot records 1,263 matching company records, 80,045 tracked contacts and 31,929 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 20, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Legacy system modernization firms by geography
- Legacy system modernization firms based in Buenos Aires, Argentina
- Legacy system modernization firms based in Brisbane, Australia
- Legacy system modernization firms based in Melbourne, Australia
- Legacy system modernization firms based in Perth, Australia
- Legacy system modernization firms based in Sydney, Australia
- Legacy system modernization firms based in Dhaka, Bangladesh
- Legacy system modernization firms based in Barueri, Brazil
- Legacy system modernization firms based in Belo Horizonte, Brazil
- Legacy system modernization firms based in Campinas, Brazil
- Legacy system modernization firms based in Curitiba, Brazil
- Legacy system modernization firms based in Rio De Janeiro, Brazil
- Legacy system modernization firms based in Sao Paulo, Brazil
Cite this list
RevenueBase Data Team. Top 25 legacy system modernization firms based in France. Snapshot: September 20, 2026. https://revenuebase.ai/companies/legacy-system-modernization-firms/france.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
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- Lists A-Z
- New lists
- Legacy system modernization firms based in Buenos Aires, Argentina
- Legacy system modernization firms based in Brisbane, Australia
- Legacy system modernization firms based in Melbourne, Australia
- Legacy system modernization firms based in Perth, Australia
- Legacy system modernization firms based in Sydney, Australia
- Legacy system modernization firms based in Dhaka, Bangladesh
Company intelligence · public preview
Top 25 legacy system modernization firms based in France
RevenueBase records 1,263 matching company records for legacy system modernization firms based in France, with 80,045 tracked contacts and 31,929 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 20, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 legacy system modernization firms based in France
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Sopra Steriasoprasteria.com HQ: Paris, FranceReported employees: 10001+ | Paris, France | 10001+ | Exact match | 36,960 contacts → |
“Sopra Steria, a major Tech player in Europe with employees in nearly 30 countries, is recognised for its consulting, digital services and solutions.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Wavestonewavestone.com HQ: 100-101 Terrasse Boieldieu, FranceReported employees: 1,001-5,000 | 100-101 Terrasse Boieldieu, France | 1,001-5,000 | Exact match | 6,190 contacts → |
“Wavestone is a leading consulting firm operating at the intersection of business and technology.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Groupe SIIsii-group.com HQ: Paris, FranceReported employees: 10001+ | Paris, France | 10001+ | Exact match | 4,928 contacts → |
“Le groupe SII est une société d’ingénierie et de conseil en technologies (ICT) et une entreprise de services numériques (ESN) créée en 1979 par Bernard HUVÉ, ingénieur de…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Keyruskeyrus.com HQ: Levallois-perret, FranceReported employees: 1,001-5,000 | Levallois-perret, France | 1,001-5,000 | Exact match | 1,964 contacts → |
“At Keyrus, we help organizations move from experimental AI to industrialized AI, from isolated agents to orchestrated systems, and from insight to execution.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Infotelinfotel.com HQ: Neuilly-sur-seine, FranceReported employees: 1,001-5,000 | Neuilly-sur-seine, France | 1,001-5,000 | Exact match | 1,735 contacts → |
“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 description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Prodwareprodwaregroup.com HQ: Paris, FranceReported employees: 1,001-5,000 | Paris, France | 1,001-5,000 | Exact match | 1,394 contacts → |
“At Prodware, we believe that Trust, Audacity, and Passion are the driving forces behind meaningful digital transformation.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | NIJIniji.fr HQ: Issy-les-moulineaux, FranceReported employees: 1,001-5,000 | Issy-les-moulineaux, France | 1,001-5,000 | Exact match | 1,256 contacts → |
“Créée en septembre 2001, Niji est une société de conseil, de design et de mise en œuvre technologique, entièrement dédiée à la transformation numérique des entreprises et des…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Acensiacensi.fr HQ: Courbevoie, FranceReported employees: 1,001-5,000 | Courbevoie, France | 1,001-5,000 | Exact match | 844 contacts → |
“You will be part of ACENSI network: 1650 co-workers involved in IS transformation projects at our clients through our multisectoral expertise.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Klanikklanik.com HQ: Marseille, FranceReported employees: 501-1,000 | Marseille, France | 501-1,000 | Exact match | 585 contacts → |
“KLANIK is a consulting company specialized in IT Engineering which accompanies its partners in their digital and technological projects.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Altecaalteca.fr HQ: Villeurbanne, FranceReported employees: 501-1,000 | Villeurbanne, France | 501-1,000 | Exact match | 574 contacts → |
“Alteca is a French IT & Digital services company created in 1996.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | DCS Easywaredcsit-group.com HQ: Lyon, FranceReported employees: 1,001-5,000 | Lyon, France | 1,001-5,000 | Exact match | 532 contacts → |
“Filiale du Groupe SYNERGIE, DCS SYNERGIE GROUP capitalise sur son histoire pour accompagner chaque jour les enjeux IT de ses clients.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Ippon Technologiesippon.tech HQ: Paris, FranceReported employees: 201-500 | Paris, France | 201-500 | Exact match | 510 contacts → |
“USING OUR COLLECTIVE ENERGY FOR POSITIVE TECHNOLOGY Ippon is a consulting and expertise firm, who is convinced that technology is a source of progress for society.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Zenikazenika.com HQ: Paris, FranceReported employees: 501-1,000 | Paris, France | 501-1,000 | Exact match | 430 contacts → |
“Zenika is an IT consulting firm with 550 employees that helps companies with their digital transformation.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Audensielaudensiel.com HQ: Boulogne-billancourt, FranceReported employees: 1,001-5,000 | Boulogne-billancourt, France | 1,001-5,000 | Exact match | 417 contacts → |
“Digital transformation company, business and technology consulting, Audensiel supports its clients in all business sectors in France and abroad in the following areas- Digital…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | ITS Group S.Aitsgroup.com HQ: Boulogne-billancourt, FranceReported employees: 1,001-5,000 | Boulogne-billancourt, France | 1,001-5,000 | Exact match | 342 contacts → |
“For over 20 years, ITS Group has supported companies in their digital transformation projects thanks to the strength of its specialized areas of expertise.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | LÙKLAluklagroup.com HQ: Paris, FranceReported employees: 501-1,000 | Paris, France | 501-1,000 | Exact match | 331 contacts → |
“Together, aiming higher and going further to unlock your potential.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Amiltoneamiltone.com HQ: Villeurbanne, FranceReported employees: 201-500 | Villeurbanne, France | 201-500 | Exact match | 314 contacts → |
“Bienvenue chez Amiltone.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Insideinsidegroup.fr HQ: Toulouse, FranceReported employees: 201-500 | Toulouse, France | 201-500 | Exact match | 313 contacts → |
“Inside est une société de conseil et de services numériques qui simplifie et accélère la transformation des entreprises, de la stratégie à la mise en œuvre, avec un objectif clair…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Cyllenegroupe-cyllene.com HQ: Paris, FranceReported employees: 201-500 | Paris, France | 201-500 | Exact match | 279 contacts → |
“Chez Cyllene, on couvre le spectre complet de votre besoin en termes de : Conseils 🧬 Définition d’architectures Hébergement & Services managés Cybersécurité & Formations…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Ouidououidou.fr HQ: Paris, FranceReported employees: 201-500 | Paris, France | 201-500 | Exact match | 252 contacts → |
“Fondée en 2017, Ouidou est une entreprise de services du numérique regroupant plus de 250 collaborateurs.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Theodotheodo.fr HQ: Paris, FranceReported employees: 501-1,000 | Paris, France | 501-1,000 | Exact match | 236 contacts → |
“A Theodo, toute notre énergie est tournée vers la satisfaction de nos clients.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | AS International Groupasinter-group.com HQ: Paris, FranceReported employees: 501-1,000 | Paris, France | 501-1,000 | Exact match | 204 contacts → |
“Société du groupe Neurones, AS International Group soutient les entreprises dans leur transformation digitale en proposant des solutions informatiques innovantes.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Groupe SYDsyd.fr HQ: Saint Herblain, FranceReported employees: 201-500 | Saint Herblain, France | 201-500 | Exact match | 198 contacts → |
“Chez SYD, nous accompagnons depuis plus de 25 ans les entreprises : TPE, PME et grands comptes, tous secteurs confondus dans leur accélération digitale.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | OXYLoxyl.fr HQ: Arcueil, FranceReported employees: 51-200 | Arcueil, France | 51-200 | Exact match | 198 contacts → |
“Oxyl Groupe | L’humain au cœur de la technologie Chez Oxyl Groupe, nous accompagnons les entreprises dans leurs transformations digitales avec une conviction simple : la…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Wemanity Reply Pariswemanityreply.com HQ: Paris, FranceReported employees: 201-500 | Paris, France | 201-500 | Exact match | 178 contacts → |
“Wemanity Reply is a consulting and delivery firm specialized in technological, organizational, and cultural transformation.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,263 company matches
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Legacy system modernization firms: dataset insights
September 20, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,261 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,263 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 20, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Legacy system modernization firms by metro
Questions about this company list
What does Exact match mean for legacy system modernization firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many legacy system modernization firms did RevenueBase find based in France?
The saved snapshot records 1,263 matching company records, 80,045 tracked contacts and 31,929 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 20, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 legacy system modernization firms based in France. Snapshot: September 20, 2026. https://revenuebase.ai/companies/legacy-system-modernization-firms/france.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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