Legal research coverage for large firms and in-house teams
Primary law, secondary sources, and commentary come from 2,500+ publishers, courts, and exclusive partners.
Research case law and statutes
Access UK case law and legislation, plus secondary legislation.
Explore rules and commentary
Find court rules, procedural guidance, secondary sources, and commentary.
Research international materials
Examine foreign case law and legislation, plus cross-border regulation.
Check historical versions
Review past versions of legislation, with citation and treatment histories.
I have confidence that the dataset and the source we’re using is just the case law. It’s just the statute. It’s all of the same things that I would look at if I was doing research on my own.
Partner, Fisher Phillips
Research tools for complex questions
Structured filters and Boolean search help teams find the authority that fits.
Check treatment and strength
See citation treatment, validation status, and precedential strength at a glance.
Follow interpretation over time
Find key passages and see how courts have interpreted precedent over time.
Compare across borders
Weigh one jurisdiction against another and filter by court, region, or practice area.
The deepest context, for the highest stakes.
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1bn+ court records
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300,000+ new documents, with additions daily
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30+ in-house security and compliance professionals
Stay current on the law you rely on
Get fresh material daily
Find new material added daily from courts, governments, and regulators.
Rely on human editors
Human editors review and oversee incoming legal content.
Track amendments
Hear about amendments to the statutes and regulations your team follows.
Research for in-house legal work
In-house teams can ground their advice in primary and secondary sources.
Back policy advice
Support policy guidance with the authority behind it.
Defend contract positions
Ground contract positions in current law and commentary.
Answer regulators
Respond to regulatory inquiries with sources you can cite.
Legal research database FAQs
What is a legal research database?
A searchable collection of legal sources, such as judgments, statutes, regulations, and commentary. Clio Library holds more than one billion primary and secondary documents from over 100 countries, drawn from 2,500+ publishers, courts, and exclusive partners.
What sources does Clio Library include?
UK case law and legislation, secondary legislation, court rules, secondary sources and commentary, international case law and legislation, and historical legislative versions, along with citation and treatment histories.
How current is the content?
Courts, governments, and regulators add material every day, and a team of human editors oversees the updates. Historical versions stay available, so you can see what the law said at an earlier date.
Does Clio Library show how a case has been treated?
Yes. Each authority shows its citation treatment, validation status, and precedential strength, along with how courts have interpreted it over time.
Does Clio Library support Boolean search?
Yes. Combine Boolean search with structured filters by court, region, or practice area to narrow results to the authority that fits your question.
Can I compare law across jurisdictions?
Yes. Compare jurisdictions, including cross-border regulatory materials, and filter by court or region, which helps teams advising on matters in more than one country.
Is Clio Library suitable for in-house legal teams?
Yes. In-house teams use it to ground policy advice, contract positions, and regulatory responses in primary and secondary sources they can cite to the business.
How is my organisation’s data protected?
Single sign-on, audit trails, encryption, and data governance tools protect your organisation’s data, and permissions can be set at a granular level. A security and compliance staff of more than 30 people works in-house at Clio.