Swiss-Noxtua and CASUS are the two Swiss legal AI platforms with the greatest functional overlap. Swiss-Noxtua stands out with exclusive access to the Basler Kommentar and legalis content, a genuine advantage for research-heavy mandates. CASUS offers a complete workflow from research through review and benchmarking to agent-driven edits directly in Microsoft Word, at a significantly lower price point.
TL;DR – Decision guide at a glance
Swiss-Noxtua is a better fit when:
Legal commentary (Basler Kommentar, Commentaire romand) is used daily
legalis is already licensed or will be licensed alongside
Authorities or institutions require ISO 42001 / BSI C5 certifications
CASUS is a better fit when:
Daily document workflow in Word is the main priority
A team of multiple seats needs to scale cost-effectively
Risk review with severity levels, benchmarking, agent mode and an AI data room are needed in one platform
Combining both makes sense when commentary research (Swiss-Noxtua) and intensive document work in Word (CASUS) serve distinct user groups within the same organisation.
What is Swiss-Noxtua?
Swiss-Noxtua is a joint product, announced on 29 October 2025, from Noxtua SE (Berlin, emerging from AI startup Xayn) and Swiss legal publisher Helbing Lichtenhahn, part of the C.H.Beck Group. In April 2025, Noxtua closed a Series B round of EUR 80.7 million, the largest European legal AI funding round to date, led by C.H.Beck, with CMS, Dentons and Northern Data participating.
The partnership model explains the product proposition: Noxtua provides the AI infrastructure, Helbing Lichtenhahn the exclusive access to legalis content, including the Basler Kommentar and the Commentaire romand. The platform runs exclusively on Swiss servers, independent of US hyperscalers, and holds certifications.
The product is still in launch phase (2026). Announced modules include natural-language research with references to statutes, case law and literature, document analysis, document drafting, matrix analysis across hundreds of documents, and workflow functions.
Comparison table
Feature | Swiss-Noxtua | CASUS |
|---|---|---|
Case law database | Swiss case law | 660,000+ cantonal/federal decisions, with reasoning-section highlights |
Recherche mit Verlagscontent (Basler Kommentar, legalis) | Ja – exklusiv | Nein |
Risk review with severity (low/mid/high) | Document analysis (details not publicly specified) | Yes – party-aware, severity low/medium/high |
Benchmark with % match | Not publicly confirmed | Yes – comparison against playbook/standard, incl. % match |
Agent mode / redlining directly in Word | Present in Noxtua product family (Swiss version: not publicly confirmed) | Yes – changes applied directly in Word, correct formatting |
Matrix analysis / AI data room | Matrix analysis (hundreds of documents) | AI data room (extraction, tables, anomaly flags) |
Proofread | Not publicly confirmed | Yes – incl. Swiss spelling conventions, cross-references, placeholders |
Hosting | Swiss servers exclusively | Switzerland / EU |
Zero data retention / no human review | Not publicly specified | Yes – zero data retention, no human review |
Price (public, as of June 2026) | CHF 342/user/month (12 months, incl. legalis licence) | CHF 125/seat/month (intro price), CHF 100 on annual billing |
Swiss market maturity | Launch phase 2026 | Established in market |
Research – Swiss-Noxtua's legalis advantage
Anyone working with legal commentaries daily will immediately recognise the Swiss-Noxtua advantage. Exclusive access to the Basler Kommentar and the Commentaire romand is not a marketing claim. It is a structurally embedded asset. Helbing Lichtenhahn brings this content into the platform as a publishing partner, a combination no independent AI provider can simply replicate.
For an M&A boutique in Zurich that routinely checks transaction documents against Federal Court case law and commentary literature, or for a government office in Bern producing opinions with bibliographic support, this access is a genuine argument. Legal research without cited sources has no value in a professional context, and legalis content provides exactly that recognised citation base.
CASUS has its own strength in case law: 660,000+ cantonal and federal court decisions with reasoning-section highlighting, so the relevant passages are visible directly in the answer without navigating away. Commentary literature is not integrated there. Those who need the Basler Kommentar need it, and on that point, Swiss-Noxtua is clearly ahead.
Document skills – where CASUS makes a difference
A Geneva-based in-house team reviewing supplier and service agreements every day does not need commentary research for each contract. It needs speed, structured findings and the ability to work directly in the document itself.
That is precisely where CASUS is strongest. The Risk & Quality Review identifies the contracting parties, analyses risks from each party's perspective and prioritises every finding by severity level (low/medium/high), with concrete drafting suggestions that can be applied with a click directly in Word, correctly formatted, without copy-paste. The Benchmark checks a document against an internal playbook or best-practice standard and displays the match as a percentage, useful for procurement teams measuring supplier contracts against their standard NDA.
In Agent Mode, CASUS executes changes directly in the document: insert a clause, rewrite a liability section, adjust numbering, all while respecting the document structure. The AI Data Room allows parallel analysis of dozens to hundreds of contracts, with user-defined extraction fields and tabular output that feeds directly into Excel.
For an M&A team in Geneva that needs to review a hundred target-company contracts for liability caps, notice periods and IP clauses during a due diligence phase, that is not a feature. It is the core of the workflow. Swiss-Noxtua also offers a matrix analysis, but the depth of integration in Word is more clearly documented for the CASUS version.
Pricing compared
The pricing picture is straightforward. Swiss-Noxtua costs CHF 342 per user per month on a 12-month term, with a 10% discount at 24 months and individual pricing from 20 users. The legalis Open Licence is included, so the price covers both the AI tool and the database access.
CASUS costs CHF 125 per seat per month as of June 2026 (introductory price, regular CHF 145), or CHF 100 per seat on annual billing. Without a publisher licence bundle.
For a team of ten users on annual billing: CHF 12,000 per year with CASUS versus CHF 41,040 with Swiss-Noxtua. The difference of roughly CHF 29,000 per year is substantial. It can only be justified if the commentary content delivers direct, measurable value in daily use.
Those who already license legalis separately would effectively be paying twice with Swiss-Noxtua. Those who have no legalis licence but need commentary literature intensively get it bundled and should offset the price against their existing licence cost.
Data protection and sovereignty – both strong, differently justified
This section has no winner. Both platforms meet high standards, through different means.
Swiss-Noxtua runs exclusively on Swiss servers, independent of US hyperscalers. The certification list is a strong argument for authorities and institutions that require formal evidence. ISO 42001 specifically addresses AI management systems; BSI C5 is a German cloud standard widely referenced in the public sector.
CASUS hosts in Switzerland and the EU, with no data transfer to the US. Zero Data Retention means no content persists after processing. No Human Review means requests are not manually accessed. Those who want to review the detailed security specifications can find them on the security page.
For a Zurich law firm with an international mandate structure operating under the professional secrecy obligation, both models are compatible, provided the data processing agreement is properly documented.
When Swiss-Noxtua is the better choice
There are concrete scenarios where Swiss-Noxtua clearly outperforms CASUS.
If commentary research is the primary use case, meaning a lawyer looks up the Basler Kommentar or the Commentaire romand multiple times a day and wants the AI tool to draw directly on those sources, Swiss-Noxtua delivers exactly that. No other Swiss tool has this access.
Government agencies and public-law institutions that select providers based on formal certification lists (ISO 42001, BSI C5) will find the necessary documentation with Swiss-Noxtua.
Those who already use legalis and want to extend AI access to the same source are essentially paying for integration, not a new licence, which is easier to budget for internally.
Who CASUS is the better choice for
Law firms and in-house teams where contract work in Word is the daily core will find a more direct fit with CASUS. The workflow from risk analysis through benchmarking to direct document editing in agent mode is designed as a complete platform, not as an add-on to a literature database.
The pricing model scales more cost-effectively across teams. Those who need legal research on Swiss law have access to over 660,000 decisions with reasoning-section highlighting; the legal research function covers cantonal and federal court jurisprudence. Legal research for German and Austrian law is launching soon.
For an in-house legal department at an industrial or pharmaceutical company in German-speaking Switzerland that reviews supplier, licence and service agreements daily, the price-to-value advantage of CASUS is considerable, and the Word integration keeps tool-switching to a minimum.
Those who want to try CASUS can get started at app.getcasus.com/signup directly, without a sales call and with immediate access to all modules. The introductory price of CHF 125 per seat per month applies as of June 2026.
Decision framework
Choose Swiss-Noxtua when:
The Basler Kommentar / Commentaire romand is used daily
legalis is being procured regardless
Formal certification evidence (ISO 42001, BSI C5) is institutionally required
Choose CASUS when:
Risk review, benchmarking, agent mode and AI data room directly in Word are the priority
The team has more than 3–4 seats and price needs to scale
Document work (not commentary research) makes up the majority of working time
Consider combining when:
One team runs research-heavy mandates (Swiss-Noxtua) and transactional document work (CASUS) in parallel
The cost base can be split across two budget lines
FAQ
What is the difference between Noxtua and Swiss-Noxtua?
Noxtua SE is the Berlin-based AI company that developed the technology platform. Swiss-Noxtua is a specific joint product of Noxtua SE and Swiss publisher Helbing Lichtenhahn, which exclusively integrates access to legalis content (including the Basler Kommentar) and runs solely on Swiss servers.
What does Swiss-Noxtua cost compared to CASUS?
Swiss-Noxtua costs CHF 342 per user per month on a 12-month term, including the legalis Open Licence. CASUS costs CHF 125 per seat per month (introductory price as of June 2026) or CHF 100 on annual billing, without a publisher licence bundle.
Does Swiss-Noxtua have a Word add-in?
A Word add-in is present in the Noxtua product family, including tracked-changes functionality. Whether this feature is available in the Swiss-Noxtua version specifically has not been publicly confirmed as of June 2026.
Is CASUS cheaper than Swiss-Noxtua?
Yes, significantly. For a team of ten users on annual billing, CASUS comes to around CHF 12,000 per year (CHF 100/seat/month), compared to CHF 41,040 with Swiss-Noxtua. Part of the difference reflects the included legalis licence in the Swiss-Noxtua price.
Where is data stored on each platform?
Swiss-Noxtua runs exclusively on Swiss servers, without US hyperscalers. CASUS hosts in Switzerland and the EU, with no data transfer to the US, zero data retention and no human review of content.
Does CASUS have access to the Basler Kommentar?
No. The Basler Kommentar and legalis content are exclusively integrated in Swiss-Noxtua. CASUS offers case law (660,000+ decisions) and statutory law, but no commentary literature from Helbing Lichtenhahn or C.H.Beck.
Can Swiss-Noxtua and CASUS be used together?
Yes. Teams with clearly separated use cases (commentary research on one hand, contract work in Word on the other) can run both tools in parallel. The combined cost increases accordingly but can be split across two budget lines.
