Company lists · Data refreshed November 2026

Top 25 Legacy system modernization services based in Paris, France

Name: Legacy system modernization services based in Paris, France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 82 companies tracked

RevenueBase identified 82 company matches for legacy system modernization services associated with Paris, France as of November 2026 and tracks 2,759 professional contacts across them, including 1,330 with verified work emails. Across France, Paris is the largest hub for this category.

This list covers company matches for legacy system modernization services associated with Paris, 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

82Companies

2,759Contacts tracked

1,330Verified emails

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The 25 largest legacy system modernization services based in Paris, France

Ranked by team size

Top 25 of 82 company matches for legacy system modernization services based in Paris, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Ouidou	Exact match	Paris, FranceHQ recorded Nov 6, 2026	201-500	289 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 · Nov 6, 2026 · View company records in RevenueBase
2	Cyllene	Exact match	Paris, FranceHQ recorded Nov 6, 2026	201-500	283 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 · Nov 6, 2026 · View company records in RevenueBase
3	HR Team Group	Exact match	Paris, FranceHQ recorded Nov 6, 2026	501-1,000	136 contacts →
	Exact match “Since 2005, HR Team, Digital Services Company, has been ensuring a digital strategy in line with the ambition of its customers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Flexsi	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	33 contacts →
	Exact match “Piloter la performance numérique de votre entreprise.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	TECOS	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	30 contacts →
	Exact match “TECOS est une entreprise de services du numérique qui participe activement au marché de la transformation digitale en France.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	We ARE Beebay	Exact match	Paris, FranceHQ recorded Nov 6, 2026	51-200	28 contacts →
	Exact match “We Are Beebay is an IT consulting agency.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Kp2i	Exact match	Paris, FranceHQ recorded Nov 6, 2026	51-200	27 contacts →
	Exact match “KP2i est un cabinet de Conseil & de Services qui vous accompagne pour transformer votre système d’information en un véritable partenaire business.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	BEK Advisory	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	25 contacts →
	Exact match “Bek Advisory est un cabinet de conseil en management et en organisation spécialisé dans la gestion de projets de transformation SI et métier.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Euraxiel	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	23 contacts →
	Exact match “Notre ADN : la qualité des développements et l’industrialisation des processus.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Limpid IT	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	23 contacts →
	Exact match “Partis du constat il y a maintenant 15 ans qu’une informatique performante est au cœur d’une activité fructueuse, nous accompagnons depuis plus de 600 clients au quotidien dans la…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	MEG Digital	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	20 contacts →
	Exact match “MEG Digital est une ESN innovante qui combine expertise technologique, agilité business et culture entrepreneuriale pour accompagner les entreprises dans leurs projets digitaux…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Mind7 Consulting	Exact match	Paris, FranceHQ recorded Nov 6, 2026	51-200	17 contacts →
	Exact match “Notre vocation, depuis l’origine, est d’aider nos clients ET nos équipes à progresser.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Energy WAY	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	15 contacts →
	Exact match “Energy Way est une ESN spécialisée dans la modernisation et la transformation digitale des systèmes d’information critiques, avec une expertise reconnue en environnements…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Allohouston	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	12 contacts →
	Exact match “At ALLOHOUSTON, we help SMEs and mid-sized companies unlock their digital potential through tailored technology solutions that go beyond the limits of standard software.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Elyone	Exact match	Paris, FranceHQ recorded Nov 6, 2026	1-10	12 contacts →
	Exact match “Depuis plus de 20 ans Elyone accompagne les entreprises dans leur digitalisation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Codezys	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	12 contacts →
	Exact match “Codezys est une ESN spécialisée sur les technologies innovantes.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Innosys	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	10 contacts →
	Exact match “InnoSys est une société de services informatique (SSII), créée en 2005 spécialisée en conseil, développement d’application, administration de réseau, sécurité et système…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Craftmania	Exact match	Paris, FranceHQ recorded Nov 6, 2026	51-200	9 contacts →
	Exact match “Dans un marché obsédé par le time-to-market, nous défendons une idée simple : une application n'est pas un livrable, c'est un actif.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Shaple	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	8 contacts →
	Exact match “We are an IT professional services company.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Concept IT	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	7 contacts →
	Exact match “Créée en 2005, Concept IT est une Entreprise de Service Numérique créée et dirigée sur les principes du Not Only SSII (NoSSII).” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Media-Ap	Exact match	Paris, FranceHQ recorded Nov 6, 2026	1-10	5 contacts →
	Exact match “Lorsque Media-AP a démarré, la technologie en était le moteur.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	IPE Maintenance ET Solutions Informatiques	Exact match	Paris, FranceHQ recorded Nov 6, 2026	11-50	4 contacts →
	Exact match “Nous sommes la filiale d’un groupe qui intervient auprès de professionnels depuis plus de 50 ans.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Barycenter Europe	Exact match	Paris, FranceHQ recorded Nov 6, 2026	1-10	3 contacts →
	Exact match “Barycenter Europe helps teams modernize critical software systems without freezing delivery.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Brome Europe	Exact match	Paris, FranceHQ recorded Nov 6, 2026	1-10	2 contacts →
	Exact match “BROME CONSULTING ET TECHNOLOGIE est un Cabinet de Conseil en Management des Systèmes d'Information et en Transformation Digitale basé en France.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Skill NOW	Exact match	Paris, FranceHQ recorded Nov 6, 2026	1-10	2 contacts →
	Exact match “SKILL NOW, accompagne ses clients dans la transformation et le pilotage de leurs projets informatiques.” Recorded in the RevenueBase company graph · Nov 6, 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 services”. 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 82 legacy system modernization services based in Paris, France

See the full list, filter by size, metro and specialty, and access 1,330 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Legacy system modernization services based in Paris, France at a glance

As of Nov 6, 2026

48.2%Verified-email coverage

33.6Average contacts per company

11-50Median size (employees)

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole France list rather than for Paris, so it is reported there. Company counts and contact totals on this page are exact for Paris, over 82 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 Paris, France whose business descriptions match “legacy system modernization services” 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 1,330 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.

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 services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many legacy system modernization services are there based in Paris, France?

RevenueBase identified 82 company matches for legacy system modernization services associated with Paris, 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?

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

Which city in France has the most legacy system modernization services?

Paris leads France with 82 company records, followed by Courbevoie (10) and Lyon (10).

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 1,330 professional contacts with verified work emails tracked across these 82 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.