Thomson Reuters Westlaw
The world's most preferred online legal research service

Our experience. Your expertise.

When being wrong is simply not an option, superior results matter. With Westlaw, you'll find the reliable legal information you need quickly and confidently. Only on Westlaw can you:

Know your research is complete with access to the most comprehensive collection of legal information
Rely on the most current version of the law with proprietary editorial enhancements
Deliver better results confidently with WestSearch, the only search engine designed specifically for the law

Our people. Your peace of mind.

Experienced attorney-editors get to work the moment a court opinion is issued or a law is passed to help ensure you don't miss anything.

See how Westlaw attorney-editors build confidence into your practice. (1:42)

Explore our editorial process, and see how
Westlaw provides superior results. (2:00)

Our process. Your productivity.

Get better results faster with our superior editorial process. Our attorney-editors analyze, categorize, and summarize the law, building proprietary enhancements to help you understand the law and find on-point materials.

Our technology. Your head start.

Our unwavering commitment to advancing legal research is the force behind our best-in-class technological innovation. It puts you one step ahead of your competition.

See what's new on Westlaw

Advanced legal technology helps you get the right information quickly. (1:46)

Why Westlaw?

Authoritative content
Access the most comprehensive collection of legal information, backed by a rigorous editorial process

Editorial enhancements
Headnotes, Notes of Decisions, and the Key Number System guide you to your answers quickly

Technological innovation
From WestSearch to Research Recommendations, cutting-edge technology gives you a competitive edge

Dedicated attorney-editors
Our bar-admitted attorney-editors track legal changes every day, so you can trust the law you get is accurate and up to date

Bar-admitted reference attorneys
Access on-demand legal research support to help you whenever you need it

KeyCite citation service
Make sure you’re citing good law with the industry’s most accurate, up-to-the-minute citation service

Experience Westlaw
for yourself

Work smarter, more efficiently, and with total confidence in your results.

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The legal community agrees.
Better matters.

Legal professionals like you have chosen Westlaw as the world's leading research service.

See all Westlaw awards

Hear from Quinn Murphy, Sr. Counsel at Sandberg, Phoenix and Von Gontard, why having the superior legal research service matters. (1:46)

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"I use Westlaw on a daily basis, and I can’t imagine what I would do without it. With the exception of my computer, it might be the most important and helpful tool I use in my practice."

Joseph Anderson
Associate Attorney
Hirsch & Westheimer, P.C.

"Westlaw provides a significant value to our clients in that we know that we are going to get reliable information. It’s cost-effective because it’s so efficient."

Sara Obermark
Litigator
Sandberg Phoenix & Von Gontard P.C.

"For me, the most important benefit that I get from Westlaw is really that feeling of completeness. That when I’m looking at a legal issue, I’ve really gotten to the bottom of what the case law says about that issue."

Jarrett Behar
Partner
Sinnreich, Kosakoff & Messina Attorneys at Law

"When you've got a research tool like Westlaw, there is no reason not to be complete and thorough in your research."

Tom Carpenter
City Attorney

"I love the changes Westlaw has made in the last few years. The interface is much more user-friendly. It's a great resource and I couldn't do my job without it."

Government Attorney