Graded C+ on resilience. In Vannus's assessment it has not disclosed which model it runs — acceptable, with limits worth knowing.
European legal AI (developed by Berlin-based Xayn, rebranding to Noxtua SE) built on proprietary legal language models trained on expert-labelled legal texts, targeted at German and other European jurisdictions. The vendor states the system runs in "Highly secure data centres operated by European partners, independent of US cloud providers", can run on-premise or on a sovereign European cloud, and
Not disclosed. Noxtua does not publish which model it runs, so this criterion is excluded and the grade rests on what we could verify. We say so rather than guess.
This is a separate question from the grade above. The grade measures resilience — whether the tool endures and whether you could leave it. This measures who can compel your data. A tool can score modestly on one and strongly on the other, and many do.
The vendor's published or catalog-recorded posture — the concrete facts this grade is built from. A full audit verifies each against the vendor's current documentation.
Vannus grades Noxtua against nine dimensions of trust — data sovereignty, training privacy, compliance posture, operational resilience, exit portability, and more. The heaviest criterion asks whether the tool builds its own AI or resells someone else's model; where the vendor discloses it, the grade cites the vendor's own documentation. No paid placements — scoring is walled off from affiliate revenue. See the methodology →