Company lists · Data refreshed September 2026

Top 25 Custom software consultancies based in Luxembourg

Name: Custom software consultancies based in Luxembourg
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 46 companies tracked

RevenueBase identified 46 custom software consultancies headquartered in Luxembourg as of September 2026 and tracks 1,487 professional contacts across them, including 499 with verified work emails and 29 with mobile numbers. Luxembourg is the largest hub.

This list covers custom software consultancies 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 24, 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 24, 2026 86% judged on-target in blind review

46Companies

1,487Contacts tracked

499Verified emails

29Mobile numbers

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The 25 largest custom software consultancies based in Luxembourg

Ranked by team size

Top 25 of 46 custom software consultancies based in Luxembourg, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to custom software 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	Arhs Group	Indirect evidence	Belvaux Luxembourg, LuxembourgHQ checked Sep 24, 2026	1,001-5,000	911 contacts →
	Indirect evidence “Arηs Group, Part of Accenture - is a market leader in the management of complex IT projects and systems.” Source: RevenueBase Database · checked Sep 24, 2026
2	Edda Luxembourg	Indirect evidence	Windhof, LuxembourgHQ checked Sep 24, 2026	51-200	100 contacts →
	Indirect evidence “Edda (formerly C-Services) is a company created in 2008 and since then has developed several expertise- Enterprise Content Management: Our SharePoint and Office 365 experts will…” Source: RevenueBase Database · checked Sep 24, 2026
3	AKABI	Partial evidence	Itzig, LuxembourgHQ checked Sep 24, 2026	51-200	98 contacts →
	Partial 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 24, 2026
4	AINOS	Indirect evidence	Windhof, LuxembourgHQ checked Sep 24, 2026	11-50	59 contacts →
	Indirect evidence “An application is much more than a code base; it is an ever-changing set of constraints, expectations and unforeseen events.” Source: RevenueBase Database · checked Sep 24, 2026
5	Elliott Group	Indirect evidence	Mondorf Les Bains, LuxembourgHQ checked Sep 24, 2026	51-200	54 contacts →
	Indirect evidence “Fondée en 2009, Elliott Group, au travers de ses différentes entités, Elliott Developments, Elliott Consulting et Elliott CyberSquad s’est construite autour d’une compétence très…” Source: RevenueBase Database · checked Sep 24, 2026
6	Digitalize Advisory Certified B Corp	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	11-50	24 contacts →
	Indirect evidence “Digitalize, certified B Corp™ and elected Best Place To Work!” Source: RevenueBase Database · checked Sep 24, 2026
7	Xpectis	Partial evidence	Holzem, LuxembourgHQ checked Sep 24, 2026	11-50	20 contacts →
	Partial evidence “Xpectis is a leading provider of IT Solutions & Services to an expanding range of customers.” Source: RevenueBase Database · checked Sep 24, 2026
8	Technology Partner	Indirect evidence	Pontpierre, LuxembourgHQ checked Sep 24, 2026	11-50	16 contacts →
	Indirect evidence “Technology Partner is an IT services company specialised in project development, consultancy and automation of company processes and procedures.” Source: RevenueBase Database · checked Sep 24, 2026
9	Biac LOG	Indirect evidence	Steinfort, LuxembourgHQ checked Sep 24, 2026	11-50	15 contacts →
	Indirect evidence “BIAC Log est un bureau d’informatique spécialisé dans la conception d’applications de gestion stables et fiables qui s’adaptent aux spécificités et aux besoins de l’entreprise…” Source: RevenueBase Database · checked Sep 24, 2026
10	Lightbulb	Partial evidence	Lorentzweiler, LuxembourgHQ checked Sep 24, 2026	11-50	13 contacts →
	Partial evidence “We offer everything from websites and online shops to mobile apps and customized internal tools.” Source: RevenueBase Database · checked Sep 24, 2026
11	Avicene Consulting Services	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	51-200	11 contacts →
	Indirect evidence “Avicene Consulting Services is a leading provider of IT services with almost two decades of experience serving European Institutions.” Source: RevenueBase Database · checked Sep 24, 2026
12	Lusis Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	11-50	10 contacts →
	Indirect evidence “Lusis est un fournisseur de logiciel et de services TIC européen formé il y a plus de 15 ans à Paris présent au Luxembourg depuis 2005.” Source: RevenueBase Database · checked Sep 24, 2026
13	Netregie	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	11-50	9 contacts →
	Indirect evidence “IT Support, IT Services & IT Projects Netregie is your IT Consulting partner in Luxembourg when it comes to planing, managing and implementing mid-size to large-scale enterprise…” Source: RevenueBase Database · checked Sep 24, 2026
14	Aurrera Consulting	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “Developing and supporting IT Transformation projects and solutions” Source: RevenueBase Database · checked Sep 24, 2026
15	Ineako IT Solutions	Indirect evidence	Marnach, LuxembourgHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “IT-Services & IT-Beratung \| Services informatiques & Conseil IT Ihre IT – modern, sicher, effizient.” Source: RevenueBase Database · checked Sep 24, 2026
16	MIIND	Partial evidence	Perlé, LuxembourgHQ checked Sep 24, 2026	1-10	6 contacts →
	Partial evidence “MIIND is committed to deliver the best value to its customers by providing a range of various IT services in consulting, development and operations.” Source: RevenueBase Database · checked Sep 24, 2026
17	Luxapps	Indirect evidence	Windhof, LuxembourgHQ checked Sep 24, 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 24, 2026
18	LUXAT	Indirect evidence	LuxembourgHQ checked Sep 24, 2026	1-10	5 contacts →
	Indirect evidence “Luxat, a Luxembourg-based IT consulting firm, specializes in a range of services tailored to meet the evolving needs of its clients.” Source: RevenueBase Database · checked Sep 24, 2026
19	MP Consulting LU	Indirect evidence	Perlé, LuxembourgHQ checked Sep 24, 2026	1-10	4 contacts →
	Indirect evidence “Our expertise is IT development.” Source: RevenueBase Database · checked Sep 24, 2026
20	SPEAR	Partial evidence	Dudelange, LuxembourgHQ checked Sep 24, 2026	1-10	4 contacts →
	Partial evidence “At SPEAR, we are your trusted local partner for innovative software engineering.” Source: RevenueBase Database · checked Sep 24, 2026
21	Crok4it	Indirect evidence	LuxembourgHQ checked Sep 24, 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 24, 2026
22	Halterego	Indirect evidence	Waldbredimus, LuxembourgHQ checked Sep 24, 2026	1-10	4 contacts →
	Indirect evidence “Halter Ego est spécialisée en conseil informatique.” Source: RevenueBase Database · checked Sep 24, 2026
23	AASCI	Partial evidence	Mertert, LuxembourgHQ checked Sep 24, 2026	1-10	3 contacts →
	Partial evidence “With 28+ years of collective tech experience on the local market, the AASCI team will help simplify IT, anticipate your software development challenges, and enable you to scale…” Source: RevenueBase Database · checked Sep 24, 2026
24	Abacus Consulting & Solutions SA	Indirect evidence	LuxembourgHQ checked Sep 24, 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 24, 2026
25	4dev	Strong evidence	LuxembourgHQ checked Sep 24, 2026	1-10	3 contacts →
	Strong evidence “Specialized custom software development for SAP” Source: RevenueBase Database · checked Sep 24, 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: custom software 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 custom software consultancies.
Partial evidence: Its own public description names part of custom software consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom software 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 46 custom software consultancies based in Luxembourg

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Custom software consultancies based in Luxembourg at a glance

As of Sep 24, 2026

33.6%Verified-email coverage

2.0%Mobile-number coverage

32.3Average contacts per company

1-10Median size (employees)

28.3%Largest-city concentration · Luxembourg

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 27.0d

3840–30

10931–60

561–90

090–180

1180+

Company record updated

Median 65.0d

00–30

56631–60

63461–90

24090–180

47180+

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 custom software 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 Luxembourg whose own description of what they do matches “custom software 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 custom software 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 custom software consultancies, 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, 499 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 24, 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 custom software 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 custom software consultancies are there based in Luxembourg?

RevenueBase identified 46 custom software consultancies 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?

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

Which city has the most custom software consultancies?

Luxembourg leads with 13 headquartered companies, followed by Windhof (3) and Diekirch (2).

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 499 verified decision-maker contacts tracked across these 46 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 24, 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.