Company lists · Data refreshed September 2026

Top 25 Legacy system modernization consultancies based in Paris, France

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 117 companies tracked

RevenueBase identified 117 legacy system modernization consultancies headquartered in Paris, France as of September 2026 and tracks 747 professional contacts across them, including 245 with verified work emails. Across France, Paris is the largest hub for this category.

This list covers legacy system modernization consultancies headquartered in Paris, 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 28, 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 28, 2026 86% judged on-target in blind review

117Companies

747Contacts tracked

245Verified emails

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

Ranked by team size

Top 25 of 117 legacy system modernization consultancies based in Paris, France, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to legacy system modernization consultancies: 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	Tlti Ingénierie Numérique	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	69 contacts →
	Indirect evidence “CONSEIL : Un savoir-faire reconnu et structuré autour d'axes métiers.” Source: RevenueBase Database · checked Sep 28, 2026
2	Kern Consulting	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	59 contacts →
	Partial evidence “Kern Consulting est un cabinet d'experts spécialistes de la transformation de l'entreprise, convaincus que le Système d'Information en est un levier incontournable.” Source: RevenueBase Database · checked Sep 28, 2026
3	Diggers	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	58 contacts →
	Indirect evidence “Diggers est un cabinet de conseil facilitateur de projets et de transformations, spécialisé dans les métiers de l'IT (développement, data & IA, devops, cloud) et une agence de…” Source: RevenueBase Database · checked Sep 28, 2026
4	Lenstra	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	53 contacts →
	Indirect evidence “Lenstra is a consultancy that specialises in Tech.” Source: RevenueBase Database · checked Sep 28, 2026
5	Kp2i	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	33 contacts →
	Partial evidence “KP2i est un cabinet de Conseil & de Services qui vous accompagne pour transformer votre système d’information en un véritable partenaire business.” Source: RevenueBase Database · checked Sep 28, 2026
6	We ARE Beebay	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	27 contacts →
	Indirect evidence “We Are Beebay is an IT consulting agency.” Source: RevenueBase Database · checked Sep 28, 2026
7	Trend-It	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	27 contacts →
	Indirect evidence “TREND-IT est un cabinet de conseil IT, d’expertise technique et de transformation digitale.” Source: RevenueBase Database · checked Sep 28, 2026
8	Aptineo	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	27 contacts →
	Indirect evidence “APTINEO, cabinet de conseil en SI, accompagne avec succès de grands groupes depuis 2008.” Source: RevenueBase Database · checked Sep 28, 2026
9	Andex International	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	26 contacts →
	Partial evidence “Depuis sa création en 2007, ANDEX vous accompagne dans votre quête d’alignement stratégique du système d’information.” Source: RevenueBase Database · checked Sep 28, 2026
10	Euraxiel	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “Notre ADN : la qualité des développements et l’industrialisation des processus.” Source: RevenueBase Database · checked Sep 28, 2026
11	EPI	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	17 contacts →
	Indirect evidence “Bénéficiez du savoir-faire de nos consultants IT pour l’amélioration des performances de votre entreprise, et assurer une meilleure expérience utilisateur pour vos clients.” Source: RevenueBase Database · checked Sep 28, 2026
12	Energy WAY	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “Energy Way est une ESN spécialisée dans la modernisation et la transformation digitale des systèmes d’information critiques, avec une expertise reconnue en environnements…” Source: RevenueBase Database · checked Sep 28, 2026
13	Naoplay	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	14 contacts →
	Partial evidence “Naoplay helps companies prepare their IT systems for the era of data and AI.” Source: RevenueBase Database · checked Sep 28, 2026
14	Elyone	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	1-10	13 contacts →
	Indirect evidence “Depuis 15 ans Elyone accompagne les entreprises dans leur digitalisation.” Source: RevenueBase Database · checked Sep 28, 2026
15	Craftmania	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	11 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 28, 2026
16	Audis Conseil	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	1-10	10 contacts →
	Partial evidence “Conseil & Pilotage de Projets - Transformation Digitale - Performance Organisationnelle - Systèmes d'Information - Data” Source: RevenueBase Database · checked Sep 28, 2026
17	Precodata	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	1-10	9 contacts →
	Indirect evidence “Precodata is a French IT consulting firm, specialized in Data / AI & Cloud architecture.” Source: RevenueBase Database · checked Sep 28, 2026
18	Innosys	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “InnoSys est une société de services informatique (SSII), créée en 2005 spécialisée en conseil, développement d’application, administration de réseau, sécurité et système…” Source: RevenueBase Database · checked Sep 28, 2026
19	Septem Consulting	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “Septem Consulting vous conseille et vous accompagne en apportant des solutions à vos enjeux SI, de transformation digitale et de refonte de vos organisations.” Source: RevenueBase Database · checked Sep 28, 2026
20	JD Conseil	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	7 contacts →
	Indirect evidence “Depuis 2008, nous accompagnons les entreprises dans leurs projets IT stratégiques : IA, Data, ERP, CRM, SI.” Source: RevenueBase Database · checked Sep 28, 2026
21	Besteam Conseil	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “Spécialisés en technologies de pointe #Data #Cloud #DevOps #Agilité, nous intervenons sur des missions de #développement, de migration #cloud, d’architecture, de conduite de…” Source: RevenueBase Database · checked Sep 28, 2026
22	Concept IT	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “Créée en 2005, Concept IT est une Entreprise de Service Numérique créée et dirigée sur les principes du Not Only SSII (NoSSII).” Source: RevenueBase Database · checked Sep 28, 2026
23	Skill NOW	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “SKILL NOW, accompagne ses clients dans la transformation et le pilotage de leurs projets informatiques.” Source: RevenueBase Database · checked Sep 28, 2026
24	Technodym	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “TECHNODYM est une Société de service et de conseil en informatique.” Source: RevenueBase Database · checked Sep 28, 2026
25	Mosaic LAB	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Mosaic Lab offers an integrated range of services from consulting to custom software development and integration.” Source: RevenueBase Database · checked Sep 28, 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: legacy system modernization consultancies. 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 legacy system modernization consultancies.
Partial evidence: Its own public description names part of legacy system modernization consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name legacy system modernization consultancies. 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 117 legacy system modernization consultancies based in Paris, France

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

As of Sep 28, 2026

32.8%Verified-email coverage

6.4Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

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 117 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 legacy system modernization consultancies, 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 Paris, France whose own description of what they do matches “legacy system modernization consultancies”. 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 legacy system modernization consultancies), 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 legacy system modernization consultancies, and records with no verified work email. Companies headquartered outside Paris 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, 245 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 28, 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.

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 legacy system modernization consultancies, 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 legacy system modernization consultancies are there based in Paris, France?

RevenueBase identified 117 legacy system modernization consultancies headquartered in Paris, 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?

Tlti Ingénierie Numérique, headquartered in Paris, tops this list with the largest team on record.

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

Paris leads France with 117 headquartered companies, followed by Lyon (20) and Toulouse (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 245 verified decision-maker contacts tracked across these 117 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 28, 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.