Company lists · Data refreshed September 2026

Top 25 Boutique law firms based in Luxembourg

Name: Boutique law firms based in Luxembourg
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 90 companies tracked

RevenueBase identified 90 boutique law firms headquartered in Luxembourg as of September 2026 and tracks 714 professional contacts across them, including 288 with verified work emails and 11 with mobile numbers. Luxembourg is the largest hub.

This list covers boutique law 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 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

90Companies

714Contacts tracked

288Verified emails

11Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest boutique law firms based in Luxembourg

Ranked by team size

Top 25 of 90 boutique law firms based in Luxembourg, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to boutique law 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	Kleyr Grasso	Partial evidence	Strassen, LuxembourgHQ checked Sep 28, 2026	51-200	81 contacts →
	Partial evidence “KLEYR_GRASSO is an independent full-service law firm specializing in business law and litigation, serving international and domestic clients for 30 years in Luxembourg with the…” Source: RevenueBase Database · checked Sep 28, 2026
2	Brucher Thieltgen & Partners	Partial evidence	LuxembourgHQ checked Sep 28, 2026	11-50	52 contacts →
	Partial evidence “Brucher Thieltgen & Partners, a legal practice established in Luxembourg City at the heart of the international financial centre, is a multidisciplinary boutique firm active in…” Source: RevenueBase Database · checked Sep 28, 2026
3	DSM Avocats À LA Cour	Partial evidence	LuxembourgHQ checked Sep 28, 2026	11-50	40 contacts →
	Partial evidence “DSM Avocats à la Cour, an independent law firm based in Luxembourg.” Source: RevenueBase Database · checked Sep 28, 2026
4	Ts&p	Strong evidence	LuxembourgHQ checked Sep 28, 2026	11-50	30 contacts →
	Strong evidence “TS & P is a boutique law firm providing bespoke high-quality corporate and tax advice, while always considering practical and commercial aspects.” Source: RevenueBase Database · checked Sep 28, 2026
5	Brouxel & Rabia, Luxembourg LAW Firm	Partial evidence	LuxembourgHQ checked Sep 28, 2026	11-50	24 contacts →
	Partial evidence “Brouxel & Rabia Luxembourg Law Firm ("B&R") is an independent business law firm, ventured by two of the most senior and most successful partners in Luxembourg, Samia RABIA &…” Source: RevenueBase Database · checked Sep 28, 2026
6	Schiltz & Schiltz S.A	Indirect evidence	LuxembourgHQ checked Sep 28, 2026	11-50	21 contacts →
	Indirect evidence “SCHILTZ & SCHILTZ was initially established in 1932 by Tony Biever, MP.” Source: RevenueBase Database · checked Sep 28, 2026
7	Wildgen, Luxembourg LAW Firm	Partial evidence	L-, LuxembourgHQ checked Sep 28, 2026	51-200	20 contacts →
	Partial evidence “Since 1923, WILDGEN has been at the heart of law practice in Luxembourg.” Source: RevenueBase Database · checked Sep 28, 2026
8	Turk & Prum Avocats À LA Cour	Indirect evidence	LuxembourgHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “TURK & PRUM est un cabinet regroupant des avocats au service de la défense et de l’accompagnement de ses clients.” Source: RevenueBase Database · checked Sep 28, 2026
9	Thewes & Reuter	Partial evidence	LuxembourgHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “THEWES & REUTER is a full service law firm offering advisory and dispute resolution services.” Source: RevenueBase Database · checked Sep 28, 2026
10	Karp & Choucroun LAW Firm	Partial evidence	LuxembourgHQ checked Sep 28, 2026	1-10	14 contacts →
	Partial evidence “Karp & Choucroun with more than 25 years of professional practice, is a law firm established in Luxembourg city, the heart of European Union institutions and international…” Source: RevenueBase Database · checked Sep 28, 2026
11	CM LAW	Partial evidence	LuxembourgHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “At CM Law, we offer more than just legal expertise – we provide a long-term and cost-efficient relationship tailored to your needs.” Source: RevenueBase Database · checked Sep 28, 2026
12	LEX Thielen & Partners	Strong evidence	LuxembourgHQ checked Sep 28, 2026	11-50	10 contacts →
	Strong evidence “Lex Thielen & Partners is an independent boutique law firm based in Luxembourg, specialized in commercial and civil matters (dispute resolution and advisory).” Source: RevenueBase Database · checked Sep 28, 2026
13	Vandenbulke	Partial evidence	LuxembourgHQ checked Sep 28, 2026	1-10	10 contacts →
	Partial evidence “VANDENBULKE is an independent law firm specialising in two core practices: corporate and M&A and banking & finance.” Source: RevenueBase Database · checked Sep 28, 2026
14	Wolff & Partners	Strong evidence	LuxembourgHQ checked Sep 28, 2026	11-50	9 contacts →
	Strong evidence “Wolff & Partners is a Luxembourg based boutique law firm with local and international expertise and extensive experience advising international corporate and private equity…” Source: RevenueBase Database · checked Sep 28, 2026
15	Dupont Partners	Indirect evidence	LuxembourgHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “Dupont Partners serve as a critical partner to plan and execute its clients’ strategies and objectives.” Source: RevenueBase Database · checked Sep 28, 2026
16	Simon LAW S.À R.L	Strong evidence	Niederanven, LuxembourgHQ checked Sep 28, 2026	1-10	9 contacts →
	Strong evidence “Luxembourg boutique business and tax law firm” Source: RevenueBase Database · checked Sep 28, 2026
17	Patent42	Partial evidence	Esch-sur-alzette, LuxembourgHQ checked Sep 28, 2026	1-10	8 contacts →
	Partial evidence “Patent42 is a law firm acting in Intellectual Property (IP) matters including patents, trademarks and designs.” Source: RevenueBase Database · checked Sep 28, 2026
18	Praxio LAW & TAX	Strong evidence	Gelle, LuxembourgHQ checked Sep 28, 2026	11-50	8 contacts →
	Strong evidence “Tax-Corporate-M&A-Funds-Banking & Finance -Fund Financing Your Luxembourg Boutique Law Firm” Source: RevenueBase Database · checked Sep 28, 2026
19	Juridex, Avocats À LA Cour	Indirect evidence	LuxembourgHQ checked Sep 28, 2026	1-10	8 contacts →
	Indirect evidence “Créée en 2014, JuRiDex, Avocats à la Cour est une étude d’avocats dédiée au contentieux d'affaires ainsi qu'à la création et au conseil des petites et moyennes entreprises.” Source: RevenueBase Database · checked Sep 28, 2026
20	Vertumnus Lawyers	Partial evidence	LuxembourgHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Based in Luxembourg, we are an independent full service law firm.” Source: RevenueBase Database · checked Sep 28, 2026
21	C LAW	Indirect evidence	LuxembourgHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “The premier luxembourg IP & IT lawfirm.” Source: RevenueBase Database · checked Sep 28, 2026
22	Mbonyumutwa Avocats	Indirect evidence	LuxembourgHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “MBONYUMUTWA \| AVOCATS est un cabinet d’avocats indépendant, établi à Luxembourg depuis 2010, spécialisé en contentieux dans toutes les matières principales du droit luxembourgeois.” Source: RevenueBase Database · checked Sep 28, 2026
23	Elvinger Dessoy Marx	Indirect evidence	LuxembourgHQ checked Sep 28, 2026	1-10	6 contacts →
	Indirect evidence “ELVINGER DESSOY MARX est un cabinet indépendant spécialisé depuis sa création dans le droit public, le droit immobilier et le droit des sociétés.” Source: RevenueBase Database · checked Sep 28, 2026
24	B&f Avocats	Partial evidence	LuxembourgHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “B&F Avocats is an independent law firm based in Luxembourg.” Source: RevenueBase Database · checked Sep 28, 2026
25	Unalome Legal	Strong evidence	LuxembourgHQ checked Sep 28, 2026	1-10	5 contacts →
	Strong evidence “Unalome Legal is a Luxembourg boutique law firm providing expert legal advice in employment law and litigation services to entrepreneurs, local companies and international groups.” 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: boutique law 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 boutique law firms.
Partial evidence: Its own public description names part of boutique law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name boutique law 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 90 boutique law firms based in Luxembourg

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 288 reachable decision-makers.

Free signup · no credit card

View the full list →

Boutique law firms based in Luxembourg at a glance

As of Sep 28, 2026

40.3%Verified-email coverage

1.5%Mobile-number coverage

7.9Average contacts per company

1-10Median size (employees)

78.9%Largest-city concentration · Luxembourg

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

5,001-10,000

Freshness & accuracy

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

Email last verified

Median 30.0d

1510–30

11531–60

761–90

090–180

1180+

Company record updated

Median 68.0d

00–30

26331–60

21761–90

16290–180

56180+

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 boutique law 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 “boutique law 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 boutique law 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 boutique law 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, 288 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.

Boutique law firms by metro

Boutique law firms in Luxembourg71

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 boutique law 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 boutique law firms are there based in Luxembourg?

RevenueBase identified 90 boutique law 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?

Kleyr Grasso, headquartered in Strassen, tops this list with the largest team on record.

Which city has the most boutique law firms?

Luxembourg leads with 71 headquartered companies, followed by Esch-Sur-Alzette (3) and Howald (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 288 verified decision-maker contacts tracked across these 90 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.

Ready to reach these companies? Verified emails and direct dials for all 90 boutique law firms based in Luxembourg. Start with a free account, no credit card.

Download this list →

Related lists

Boutique law firms by geography

Browse the directory

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.