CASUS vs Spellbook
How CASUS compares to Spellbook
The Swiss-made legal AI built for German, Austrian and Swiss law, with deep regional case law, data that stays in Switzerland and the EU and transparent pricing — not a North American contract tool adapted for Europe.
Free 14-day trial
No credit card required
5-minute setup
Data Sovereignty
Built for confidentiality — not retrofitted for it
For lawyers across the DACH region, protecting client data is a professional obligation, not a checkbox. CASUS hosts exclusively in Switzerland and the EU, with no data transfer to the US. Spellbook is SOC 2 Type II certified and GDPR-compliant, but it runs on AWS data centres in Canada and the US, with no Swiss or EU data residency.
Capability
CASUS
Spellbook
Hosting region
Switzerland & EU only
Canada & US
No data transfer to the US
✓
—
Swiss data residency
✓
—
Zero data retention
✓
✓
ISO 27001 certified
✓
—
DACH Legal Depth
Built for DACH law by the lawyers who use it
CASUS gives you direct access to 1.8 million+ German, Austrian and Swiss court decisions, plus statutes, built by lawyers from the region for the region, with the relevant considerations highlighted in each answer. Spellbook is a contract drafting and review tool — it benchmarks clauses against market data, but there is no German, Austrian or Swiss case law or statutes behind it.
Capability
CASUS
Spellbook
German, Austrian & Swiss case law
1.8M+ decisions
—
Relevant considerations highlighted inline
✓
—
Interface languages
German & English
English
Documents handled in
Any language
Any language
Region-specific spelling & conventions
✓
Not stated
Specialised in DACH law
✓
Common-law focus
Capabilities
Built for the full DACH legal workflow
From research to review to drafting, CASUS covers the everyday work — directly in Word. Spellbook focuses on contract drafting, redlining and review.
Capability
CASUS
Spellbook
Contract review & risk analysis
✓
✓
Benchmark against your playbooks
✓
✓
Native Microsoft Word add-in
✓
✓
Legal proofreading (region-specific)
✓
—
DACH legal research
1.8M+ decisions
—
Due diligence / data room
✓
✓
Agentic multi-step workflows
✓
✓
Pricing & Access
Team-wide legal AI, without enterprise friction
Spellbook keeps its pricing behind custom quotes, with enterprise seat minimums and multi-month commitments. CASUS is transparent, self-serve and runs directly in Microsoft Word, so the whole team can adopt it.
CASUS
CHF 100
per seat / month · €108 in the EU · billed annually · all modules included
✓
Transparent, public pricing
✓
Free trial & self-service signup
✓
No seat minimum
✓
DACH legal work, directly in Word
✓
Hosting in Switzerland & the EU
Spellbook
~USD 149*
per seat / month · no public pricing · custom quote
—
Pricing not published
—
Custom quotes, sales-led for teams
—
Enterprise: 10-seat min + 6-month commit
—
North American contract drafting tool
* Spellbook does not publish pricing; figures are third-party industry estimates (2026).
Frequently asked questions
Is Spellbook available in Germany, Austria and Switzerland?
Does Spellbook support German, Austrian and Swiss law?
How much does Spellbook cost?
What is the best Spellbook alternative for DACH law firms?
Is CASUS more secure than Spellbook for DACH firms?
Can CASUS do everything Spellbook does?
Can I try CASUS instead of Spellbook?
The bottom line
DACH legal work deserves a legal AI built for it
Spellbook is a capable contract drafting and review tool used by teams across North America. But if your work is German, Austrian or Swiss — local law, local confidentiality rules, the German language — a region-built tool simply fits better. CASUS gives you depth in German, Austrian and Swiss law, data that never leaves Switzerland or the EU, native Word integration and transparent pricing the whole team can adopt.
