Company lists · Data refreshed September 2026

Top 25 Legacy system modernization firms based in Luxembourg

Name: Legacy system modernization firms based in Luxembourg
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 44 companies tracked

RevenueBase identified 44 legacy system modernization firms headquartered in Luxembourg as of September 2026 and tracks 2,710 professional contacts across them, including 1,402 with verified work emails. Luxembourg is the largest hub.

This list covers legacy system modernization firms headquartered in Luxembourg, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

44Companies

2,710Contacts tracked

1,402Verified emails

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The 25 largest legacy system modernization firms based in Luxembourg

Ranked by team size

Top 25 of 44 legacy system modernization firms based in Luxembourg, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to legacy system modernization firms: 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	Sword Group	Indirect evidence	Windhof, LuxembourgHQ checked Sep 20, 2026	1,001-5,000	1,711 contacts →
	Indirect evidence “Sword is a leader in data insights, digital transformation and technology services with a substantial reputation in complex IT, business projects and mission critical operations…” Source: RevenueBase Database · checked Sep 20, 2026
2	Intech	Indirect evidence	Kayl, LuxembourgHQ checked Sep 20, 2026	51-200	313 contacts →
	Indirect evidence “InTech est une Entreprise de Services Numériques (ESN) luxembourgeoise fondée en 1995 et filiale du groupe POST Luxembourg.” Source: RevenueBase Database · checked Sep 20, 2026
3	QBA Worldwide	Indirect evidence	LuxembourgHQ checked Sep 20, 2026	201-500	163 contacts →
	Indirect evidence “Transforming Technology into Business Impact At QBA, we believe technology should not just work-it should transform.” Source: RevenueBase Database · checked Sep 20, 2026
4	AKABI	Indirect evidence	Itzig, LuxembourgHQ checked Sep 20, 2026	51-200	98 contacts →
	Indirect evidence “AKABI is a young and entrepreneurial IT consultancy company specialized in Business Intelligence, Software Development, Cloud and IT Infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
5	CTG IT Solutions - Europe	Indirect evidence	Bertrange, LuxembourgHQ checked Sep 20, 2026	1,001-5,000	97 contacts →
	Indirect evidence “CTG serves as a catalyst for your digital transformation, offering innovative solutions and services that accelerate your strategy and project momentum.” Source: RevenueBase Database · checked Sep 20, 2026
6	Vass Benelux	Indirect evidence	Windhof, LuxembourgHQ checked Sep 20, 2026	1,001-5,000	65 contacts →
	Indirect evidence “VASS drives business value creation through strategic end-to-end digital transformation projects, combining business, technology, data, and AI solutions.” Source: RevenueBase Database · checked Sep 20, 2026
7	Accenture Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 20, 2026	51-200	60 contacts →
	Indirect evidence “Accenture helps the world’s leading enterprises reinvent by building their digital core and unleashing the power of AI to create value at speed for organizations across industries.” Source: RevenueBase Database · checked Sep 20, 2026
8	Amexio Belgium & Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 20, 2026	51-200	41 contacts →
	Indirect evidence “Our mission: Helping companies to improve their operational cost and efficiency through better process and content management, collaboration, knowledge sharing and by using the…” Source: RevenueBase Database · checked Sep 20, 2026
9	Empirys	Indirect evidence	Ehlange, LuxembourgHQ checked Sep 20, 2026	11-50	25 contacts →
	Indirect evidence “Empirys is a Luxembourg IT services company.” Source: RevenueBase Database · checked Sep 20, 2026
10	Cloud Power Luxembourg	Indirect evidence	Capellen, LuxembourgHQ checked Sep 20, 2026	11-50	13 contacts →
	Indirect evidence “Cloud Power Luxembourg -"Your IT Challenges, Our Solutions" We provide the cutting-edge expertise of our teams, modern solutions and the facilities of the Cloud with the aim of…” Source: RevenueBase Database · checked Sep 20, 2026
11	Vold Group	Indirect evidence	Bertrange, LuxembourgHQ checked Sep 20, 2026	11-50	12 contacts →
	Indirect evidence “Chez VOLD, nous propulsons la transformation digitale des entreprises pour un impact positif et durable.” Source: RevenueBase Database · checked Sep 20, 2026
12	Aurrera Consulting	Indirect evidence	LuxembourgHQ checked Sep 20, 2026	1-10	6 contacts →
	Indirect evidence “Developing and supporting IT Transformation projects and solutions” Source: RevenueBase Database · checked Sep 20, 2026
13	Luxapps	Indirect evidence	Windhof, LuxembourgHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence “LuxApps est une agence digitale spécialisée dans l'analyse et la création de solutions taillées sur-mesure pour votre entreprise.” Source: RevenueBase Database · checked Sep 20, 2026
14	Cartesoft	Indirect evidence	Platen, LuxembourgHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence “Cartesoft: A team of experts helping you achieve your projects.” Source: RevenueBase Database · checked Sep 20, 2026
15	Ndbsoft	Indirect evidence	Steinfort, LuxembourgHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence “NDB accompagne les organisations publiques et privées dans leurs projets de transformation en combinant analyse métier, conseil, gouvernance et expertise digitale.” Source: RevenueBase Database · checked Sep 20, 2026
16	SPEAR	Indirect evidence	Dudelange, LuxembourgHQ checked Sep 20, 2026	1-10	4 contacts →
	Indirect evidence “At SPEAR, we are your trusted local partner for innovative software engineering.” Source: RevenueBase Database · checked Sep 20, 2026
17	Crok4it	Indirect evidence	LuxembourgHQ checked Sep 20, 2026	1-10	4 contacts →
	Indirect evidence “CROK4IT est société qui apporte conseil et solutions informatiques aux entreprises afin de les soutenir dans la conduite de leur transition digitale.” Source: RevenueBase Database · checked Sep 20, 2026
18	Koosmik	Indirect evidence	LuxembourgHQ checked Sep 20, 2026	11-50	3 contacts →
	Indirect evidence “Unlocking the power of digital for governments and businesses.” Source: RevenueBase Database · checked Sep 20, 2026
19	E-Volution S.A	Strong evidence	Remich, LuxembourgHQ checked Sep 20, 2026	1-10	3 contacts →
	Strong evidence “We are a specialized development team for IBM i (AS400) applications, focused on modernization, integration and the evolution of existing systems.” Source: RevenueBase Database · checked Sep 20, 2026
20	Vecter	Indirect evidence	Windhof, LuxembourgHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “Avec une certification Fit4Digital, Vecter vous accompagne dans votre projet de transformation digitale.” Source: RevenueBase Database · checked Sep 20, 2026
21	Abacus Consulting & Solutions SA	Indirect evidence	LuxembourgHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “ABACUS assists enterprises in elaborating IT-supported business-solutions, from the conceptual approach to the implementation at organisational and technical level.” Source: RevenueBase Database · checked Sep 20, 2026
22	Agile Partner	Indirect evidence	LuxembourgHQ checked Sep 20, 2026	51-200	3 contacts →
	Indirect evidence “Depuis 2004, Agile Partner aide ses clients à exploiter le potentiel d'innovation des technologies logicielles et le potentiel humain de leurs équipes.” Source: RevenueBase Database · checked Sep 20, 2026
23	Catalystrpa	Indirect evidence	Esch-belvaux, LuxembourgHQ checked Sep 20, 2026	1-10	2 contacts →
	Indirect evidence “Your partner in Process Automation and Digital Transformation” Source: RevenueBase Database · checked Sep 20, 2026
24	RB Digital Solutions S.À R.L	Indirect evidence	LuxembourgHQ checked Sep 20, 2026	1-10	1 contacts →
	Indirect evidence “IT Services and IT Consulting” Source: RevenueBase Database · checked Sep 20, 2026
25	PVX Solutions	Indirect evidence	Wiltz, LuxembourgHQ checked Sep 20, 2026	1-10	1 contacts →
	Indirect evidence “In line with the "Agile" principles, we lead your project step by step.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: legacy system modernization firms. 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 firms.
Partial evidence: Its own public description names part of legacy system modernization firms, 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 firms. 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 44 legacy system modernization firms based in Luxembourg

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Legacy system modernization firms based in Luxembourg at a glance

As of Sep 20, 2026

51.7%Verified-email coverage

61.6Average contacts per company

1-10Median size (employees)

34.1%Largest-city concentration · Luxembourg

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for Luxembourg, so it is reported there. Company counts and contact totals on this page are exact for Luxembourg, over 44 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 firms, 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 Luxembourg whose own description of what they do matches “legacy system modernization firms”. 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 firms), 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 firms, and records with no verified work email. Companies headquartered outside Luxembourg 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, 1,402 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

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 firms, 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 firms are there based in Luxembourg?

RevenueBase identified 44 legacy system modernization firms headquartered in Luxembourg 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?

Sword Group, headquartered in Luxembourg, tops this list with the largest team on record.

Which city has the most legacy system modernization firms?

Luxembourg leads with 15 headquartered companies, followed by Bertrange (6) and Windhof (3).

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 1,402 verified decision-maker contacts tracked across these 44 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.