A New Legal Research Experience
vLex Library gives you instant access to over one billion legal documents from 100+ countries, with intelligent tools that surface the right precedents, verify case authority, and keep you ahead of legal changes. Research with the confidence that comes from truly comprehensive coverage.

Legal Research
Stop Second-Guessing Your Research
Transform legal research from tedious detective work into strategic advantage. vLex's platform gives you immediate clarity on case authority, uncovers hidden legal connections, and ensures you never rely on outdated law—so you can research with confidence and argue with authority.
Precedent Map
Determine case authority with confidence. The Precedent Map transforms complex citation analysis into immediate visual clarity, letting you assess case strength and discover relevant authorities at a glance.
- Avoid Citing Overturned Cases: Avoid citing overturned cases: Instantly see which precedents have been positively cited, criticized, or overruled through color-coded visual indicators that eliminate guesswork about precedential value.
- Discover Hidden Connections: Uncover case relationships that traditional searches miss to strengthen your legal arguments with supporting precedents and distinguishing authorities.
- Research with Surgical Precision: Navigate directly from overview to detail with intelligent filtering that narrows results by treatment type, legal concepts, or jurisdiction—turning comprehensive research into focused insight.

Key Passages
Zero in on the legal reasoning that matters most. Key Passages surfaces the most influential sections of legal decisions and shows you exactly how courts have interpreted and applied critical precedents over time.
- Cut through the Noise: Access the exact paragraphs that other courts cite most frequently from judicial opinions, eliminating hours spent reading peripheral reasoning to find the core legal principles.
- Understand Precedential Weight: See which passages carry the most legal authority through citation frequency analysis, ensuring you build arguments on the strongest possible foundation.
- Chronological Citation Tracking: Follow how specific legal principles have developed over time through chronological citation tracking, giving you the narrative thread that connects past decisions to current applications.

Cited Authorities
Ensure your legal foundations are solid. Cited Authorities helps you build arguments on reliable authority and gives you complete visibility into the legal sources underlying any decision, so you can stay ahead of legislative changes.
- Verify Authority Instantly: See the complete citation landscape of any case at a glance, distinguishing between case law and legislation while understanding the significance of each cited source.
- Stay Ahead of Legislative Changes: Receive immediate alerts when statutes or regulations you're relying on have been amended, with clear highlighting of what changed and when.
- Research with Historical Accuracy: View legislation as it existed at any point in time, ensuring your legal analysis reflects the law as it stood when cases were decided rather than current versions that may not apply.

Ready to Research Smarter?
See how vLex Library's billion-document database and intelligent platform can transform your legal research workflows.
FAQs
Get answers to common questions about vLex Library's global coverage, research tools, and comprehensive legal database capabilities.
How comprehensive is vLex Library's legal coverage compared to other databases?
vLex Library provides access to over one billion legal documents from 100+ countries, making it the world's most comprehensive global legal research platform. Unlike competitors focused primarily on US or UK law, we offer primary law, secondary sources, and exclusive publications from major jurisdiction across the globe. Our 2,500+ data sources include courts, governments, publishers, and exclusive partners that can't be found on any other platform.
How does the Precedent Map help me research more effectively?
The Precedent Map transforms complex citation analysis into immediate visual clarity through color-coded indicators that show whether cases have been positively cited, criticized, or overruled. This eliminates the guesswork about precedential value and helps you avoid citing bad law. You can instantly see case relationships that traditional searches miss, navigate directly from overview to detail with intelligent filtering, and discover hidden connections to strengthen your legal arguments.
How current is the legal content in vLex Library?
vLex Library receives over 350,000 new legal documents daily from official courts, governments, and regulatory bodies worldwide. Our amendment tracking system provides automatic alerts when statutes or regulations change, with clear highlighting of what changed and when. You can also view legislation as it existed at any point in time, ensuring your legal analysis reflects the law as it stood when cases were decided.
What search methods does vLex Library offer for different research needs?
vLex Library offers four flexible search methods to match how you prefer to work: Smart Searchbar provides instant suggestions as you type, Browsing the Law lets you navigate intuitively by filtering jurisdictions and practice areas, Advanced Search deploys powerful Boolean operators for precision queries, and Comparative Research allows simultaneous multi-jurisdictional analysis. This flexibility ensures you can find exactly what you need, however you think about legal research.
Latest from vLex
Stay informed about vLex product releases, industry insights, and how we're transforming legal intelligence around the globe.
View all
Clio Signs Definitive Agreement to Acquire vLex for US $1 Billion, Defining a New Era for AI-powered Legal Technology
July 01, 2025Clio, the world’s leading provider of legal technology, today announced it has signed a definitive agreement to acquire vLex, a pioneer in legal intelligence that combines cutting-edge AI with the world’s most comprehensive global legal research platform. The transaction is valued at US $1 billion and will be paid in a combination of cash and stock.
Read more
How Vincent AI Delivers Measurable ROI for Your Law Firm
June 26, 2025Learn how to build a compelling business case for legal AI implementation that delivers tangible returns. Discover Vincent AI's strategic advantages for large law firms, from quantifiable ROI calculations to successful firm-wide adoption strategies that transform operational capacity and drive competitive advantage.
Read more
Do Lawyers Have a Duty to Supervise Legal AI?
June 21, 2025Lawyers have faced hefty sanctions for filing AI-hallucinated cases with courts. Does this mean attorneys have an ethical duty to supervise legal AI under ABA Model Rule 5.3? Discover why AI supervision is necessary, but easier than managing human assistants.
Read more