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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.

  • 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
  • Leverage AI-powered legal tools to research more efficiently and with greater confidence in your results

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Questions? Call 1-800-WESTLAW

See how Westlaw works 

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.

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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

Advanced legal technology helps you get the right information quickly.

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.

Westlaw is preferred 2:1 over Lexis Advance®

2017 ABA legal technology survey

Hear from Westlaw customers

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Quinn Murphy of Sandberg Phoenix & Von Gontard explains why Westlaw helps him win cases and establishes credibility in front of clients, courts, and judges.

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