How Luxembourg law firms are integrating AI: a 2026 cabinet survey

Between January and March 2026, we held structured conversations with partners and innovation leads at twelve Luxembourg cabinets — ranging from Big-Four-affiliated firms to boutique commercial-litigation practices. The sample is small and self-selected, but the patterns it surfaces line up closely with the broader Eurostat numbers we covered in our previous post on enterprise AI adoption.

What follows is a synthesis: not a primary survey, but an editorial reading of where the legal market is in 2026.

Adoption is real, production deployment is rare

Eleven of the twelve cabinets we spoke to have at least one active AI pilot. Only three have a tool deployed firm-wide and integrated into routine workflows. The gap between pilot and production is where most of the interesting friction lives.

What lawyers are actually using AI for

Across the twelve cabinets, the use-case mix clusters into three tiers:

Tier 1 — already in routine use

Translation between French, German, Luxembourgish, and English — the most-cited day-one productivity gain.

Document summarisation — particularly for incoming pleadings and discovery materials.

Citation lookup and cross-referencing — finding the right Luxembourg article or jurisprudence reference for a known concept.

Tier 2 — piloted, partial production

Document review and due diligence — high-leverage for transactional teams, but the tools that work well in English struggle with French legal idiom.

Drafting first cuts of standard letters and conclusions — heavy partner-review overhead means net time-saving is debated.

Jurisprudence search across the Luxembourg corpus — historically poorly served by full-text search; semantic search is a clear improvement.

The anonymisation problem

Every cabinet we spoke to raised the same concern, in almost identical language: we cannot send client data to OpenAI, Anthropic, or Google. Professional-secrecy rules under Luxembourg's law on the legal profession treat client information as protected even before the GDPR analysis begins.

The corollary: the only AI tools that pass cabinet procurement are those that can demonstrate, by architecture, that personal and identifying data is removed before leaving the firm's perimeter.

How the EU AI Act has changed procurement

Two years ago, AI procurement at a Luxembourg cabinet was indistinguishable from any other software procurement: the security questionnaire ran to twenty pages, the legal-review took two weeks, and the conversation was over. In 2026, the conversation has shifted.