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AI for Lawyers

CASUS — AI for Legal

Your Swiss-hosted Legal AI associate for document review, contract benchmarking, and jurisdiction-specific legal research.

Integrates directly into Microsoft Word, focusing on DACH region compliance and jurisprudence.

What is CASUS?

CASUS: Your Swiss-hosted Legal AI associate for document review, contract benchmarking, and jurisdiction-specific legal research. It has a free plan; paid plans start at CHF 120.–. Zekai's independent review scores it 6.6 out of 10. Best for law firms and in-house counsel in the DACH region.

Facts checked 14 Oct 2026. Price changed on 9 Oct 2026.

Best forAI for Lawyers
DifferentiatorSwiss-hosted, GDPR/nFADP compliant, with a research database of 660,000+ Swiss court rulings.
ProofIntegrates directly into MS Word; ISO-27001 certified infrastructure.
Try CASUS
Free Plan Pro fromCHF 120.–
Free plan verified · free AI tools for Lawyers
6.6 Zekai
Swiss-Centric Legal AI
AI for Legal
Ease of Use
7.4
Accuracy
7.6
Value
5.8
Time Saving
5.4
Swiss-HostedGDPR CompliantMS Word Add-inLegal ResearchContract Benchmarking
📊 Independently reviewed and scored. How we score →
✍️ Reviewed by Zekai Editorial Team · Updated August 6, 2026
🏷 Is this your tool? Claim this listing →

Zekai Verdict

What is it?
CASUS is an AI-powered legal workspace designed for law firms and in-house legal teams in the DACH region.
Best for
Legal professionals in Switzerland and the EU needing a GDPR-compliant AI tool for document review and research that…
Not ideal for
Legal research feature is highly focused on Swiss jurisprudence, limiting use elsewhere.
Price
Free plan · paid from CHF 120.–
Zekai Score
6.6/10
Visit official site ↗Compare alternatives →Why this score →
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Hand-scored by Zekai

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⚡ Quick answer

For legal professionals in the DACH region, CASUS is a leading AI tool for legal research and contract analysis. It is specifically designed for this market, with a research database of Swiss federal and cantonal rulings, Swiss-hosted servers for GDPR and nFADP compliance, and direct integration into Microsoft Word.

CategoryLegal AI Assistant
Best forLaw firms and in-house counsel in the DACH region.
Price fromCHF 120.–
Free planFree Trial
DifferentiatorSwiss-hosted, GDPR/nFADP compliant, with a research database of 660,000+ Swiss court rulings.
ProofIntegrates directly into MS Word; ISO-27001 certified infrastructure.
Rating6.6/10
📖 About CASUS

CASUS is an AI-powered legal workspace designed for law firms and in-house legal teams in the DACH region. It combines document review, contract benchmarking, legal proofreading, and legal research into a single platform that integrates with Microsoft Word.

Real Impact

Before & After

❌ Before

Juggling multiple windows for research, drafting in Word, and checking compliance notes.

✅ After

A unified workflow inside MS Word for research, drafting, and contract analysis.

Prompt Templates

Try it with these prompts

Copy any prompt and paste it directly into the tool.

Benchmark Contract Against Standard

Analyze the provided contract and compare its clauses against our company's standard agreement. Identify any deviations, risks, or areas that do not meet our established legal benchmarks.

Legal Proofread for Consistency

Perform a thorough legal proofread of this document. Check for grammatical errors, inconsistencies in terminology, and adherence to legal formatting standards.

Research Swiss Legal Rulings

Search the database of 660,000+ Swiss federal and cantonal rulings for cases related to [specific legal issue]. Summarize the key findings and relevant precedents that could impact [current case or situation].

AI Prompts

Prompts for Lawyers

Prompt 01 Build an Initial Review Checklist
Act as a senior associate at an Am Law 100 firm reviewing a new Master Services Agreement (MSA) from a vendor. Your client is a US-based B2B SaaS company. The governing law is Delaware.
Prompt 02 Draft a Clause from a List of Business Terms
Act as a transactional attorney. Draft a "Limitation of Liability" clause for a software-as-a-service agreement. Context: • Governing Law: New York • My Client: The SaaS provider • Key Business Terms: • Exclude liability for indirect…
Prompt 03 Compare Two Versions of a Clause
I have two versions of an Indemnification clause. Version A is my company's preferred language. Version B is a counterparty's proposed redline. Analyze both versions and create a summary table that compares them.
See all 34 AI prompts for Lawyers →
Social Proof

Trusted by professionals

Ease of Use
7.4
Accuracy
7.6
Value
5.8
Time Saving
5.4
Start Free Today →
Connects With

CASUS integrations

Microsoft Word SharePoint (coming soon)
Setup complexity: Moderate
CASUS is an AI-powered legal workspace designed for law firms and in-house legal teams in the DACH region. It combines document review, contract benchmarking, legal proofreading, and legal research into a single platform that integrates with Microsoft Word.
Comparison

Best CASUS alternatives

Choose CASUS for its unparalleled focus on Swiss jurisprudence and data sovereignty, with its database of 660,000 local rulings and Swiss-hosted, GDPR-compliant infrastructure. Its direct MS Word integration is ideal for workflows centered on that application. Opt for a global alternative like Lexis+ AI if your practice requires broader international legal databases (e.g., US, UK), more extensive integrations beyond the Microsoft ecosystem, or if your primary work is not governed by DACH-region legal frameworks. CASUS is for regional depth; global platforms are for international breadth.

The decision

Is CASUS worth it?

Return on investment
At CHF 125 per month, saving just two billable hours on contract review or legal research makes CASUS profitable for the month.
Built for
Law firms and in-house legal teams, particularly those operating in the DACH (Germany, Austria, Switzerland) region.
Effort to adopt
Moderate
Compliance
Swiss-hosted on ISO-27001-certified infrastructure. Fully compliant with GDPR and the Swiss Federal Act on Data Protection (nFADP). Features a Zero Data Retention policy.
Who It's For

Why Legal choose this tool

🎯
Built for
Legal professionals in Switzerland and the EU needing a GDPR-compliant AI tool for document review and research that integrates directly into their Word-based workflow.
In-Depth Overview
For legal professionals in the DACH region, CASUS is built to solve local problems. Unlike US-centric tools, it is Swiss-hosted, fully GDPR and Swiss nFADP compliant, and built on ISO-27001 certified infrastructure. Its core strength lies in its deep integration with the local legal landscape, offering a research database of Swiss federal and cantonal court decisions. This isn't a generic AI; it's a specialized associate trained on relevant, regional law. The platform's primary benefit is workflow efficiency. By integrating directly into Microsoft Word as an add-in, CASUS eliminates the need to switch between applications for drafting, research, and review. You can benchmark a contract against your internal standards, proofread for legal consistency, and chat with documents to identify risks without ever leaving your document. The vendor's 'Zero Data Retention' policy and commitment to Swiss data sovereignty provides a level of security that is critical for handling sensitive client information under European privacy law.

Key Use Cases

⚖️
Accelerate Contract Review without Leaving Microsoft Word
In-House Counsel (DACH region)
Upload a third-party contract, benchmark it against your company's standard agreements, and use the AI chat to identify risks and suggest compliant clauses, all within Word.
Review time cut by hours
✓ Pros
Swiss-hosted and fully GDPR/nFADP compliant.
Direct integration with Microsoft Word simplifies workflows.
Zero Data Retention policy enhances data security.
Transparent pricing with a clear Standard tier and no minimum contract period.
· Cons
Legal research feature is highly focused on Swiss jurisprudence, limiting use elsewhere.
SharePoint integration is listed as 'coming soon' and not yet available.
As a newer tool, it may lack the feature depth of more established global competitors.
⚡ Editorial Verdict

CASUS makes a strong case for itself by focusing on a specific, underserved market: DACH legal professionals. Its commitment to local data sovereignty and a research database of Swiss rulings is a powerful differentiator. The main trade-off is this very specialization; its core research capabilities are limited for practitioners outside of Switzerland.

See all 538 AI tools for Lawyers → Browse the AI Directory →
Questions & Answers

Frequently asked questions

Where is CASUS data hosted and processed?

+
All client data is stored in Switzerland. The AI processing occurs in Europe. The entire infrastructure is designed to be fully compliant with Swiss and EU privacy standards, including attorney-client privilege.

Is CASUS compliant with European data privacy laws?

+
Yes, CASUS is fully compliant with both GDPR and the Swiss Federal Act on Data Protection (nFADP). It is hosted on ISO-27001-certified infrastructure and operates with a Zero Data Retention policy.

Does CASUS work with my existing software?

+
CASUS integrates directly into Microsoft Word as an add-in, allowing you to use its features without leaving your document. The website also states that SharePoint integration is 'coming soon'.

What legal database does CASUS use for research?

+
CASUS provides AI-powered research across a database of Swiss federal and cantonal court decisions, making it highly specialized for legal work within Switzerland.

Is CASUS suitable for legal teams outside of Switzerland?

+
While the document review and contract benchmarking tools are broadly applicable, the legal research function is specifically tailored to the Swiss legal system. Its primary value is for firms operating in or dealing with the DACH region, particularly Switzerland.

Can I use CASUS for due diligence?

+
Yes, CASUS includes an 'AI Data Room' feature designed for due diligence, allowing you to compare hundreds of documents in seconds.

Last reviewed:

Plans & Pricing

CASUS pricing and plans

Free
$0
Get Started Free
Pro
CHF 120.–
Per user/month. Includes document review, contract benchmarking, legal proofreading, AI research, and MS Word integration. No minimum contract period.
Start Pro Plan
Enterprise
Pricing on request
Tailored for teams and large organisations.
Contact Sales

Prices and features are updated regularly but can change at any time — always confirm on the official website. Some links on this page are affiliate links.

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Free guide

Take it with you

Getting Started with CASUS: A 5-Minute Guide
  • Core Benefit: Integrate AI-powered legal research and review directly into your MS Word workflow.
  • Who It's For: Swiss and EU legal professionals prioritizing compliance and efficiency.
  • What You Need: A CASUS account (start a free trial) and Microsoft Word.
  • Key Features: Swiss Case Law Research, Contract Benchmarking, Legal Proofreading, AI Chat.
  • Compliance: Swiss-hosted, GDPR & nFADP compliant, Zero Data Retention.
+3 more steps inside the guide
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About CASUS

Full Description

CASUS is an AI-powered legal workspace designed for law firms and in-house legal teams in the DACH region. It combines document review, contract benchmarking, legal proofreading, and legal research into a single platform that integrates with Microsoft Word.

Editorial Verdict

CASUS makes a strong case for itself by focusing on a specific, underserved market: DACH legal professionals. Its commitment to local data sovereignty and a research database of Swiss rulings is a powerful differentiator. The main trade-off is this very specialization; its core research capabilities are limited for practitioners outside of Switzerland.

Last reviewed:
Disclaimer
Zekai is an independent AI tools directory. We are not affiliated with, endorsed by, or officially connected to CASUS unless clearly stated. All product names, logos, and brands are the property of their respective owners and are used for identification purposes only. The information on this page — including pricing, features, and availability — is general information, may have changed since our last review, and is not professional advice. Zekai Scores and verdicts are our editorial opinion. Some outbound links are affiliate links that may earn us a commission at no extra cost to you. Spotted outdated or incorrect information? Request a correction →
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