Thomson Reuters Westlaw is the trusted legal research platform for lawyers and legal professionals worldwide. It provides unmatched access to authoritative legal content — case law, statutes, regulations, secondary sources, briefs, trial court documents, public records, expert materials, and more — so you can be confident that what you find is complete and reliable.
Westlaw Advantage is the top of three Westlaw plans, and it adds agentic AI built for the way attorneys practice. Deep Research works the way an experienced researcher does. It formulates and executes a multistep research plan across your question, then returns a step-by-step report linked to authoritative sources, covering supporting authority, contrary authority, and the reasoning between them. Deep Research Enhance lets you refine and extend that report. Deep Research Verify checks the citations and propositions in it against Westlaw content and lays the results out in a report view you can work through, and Explore More takes you deeper into the authority behind any finding. The tools show their work. You keep the judgment.
Litigation Document Analyzer reads a full document instead of checking citations in isolation. It identifies the key components of a complaint, flags language that mischaracterizes the law, catches hallucinated cases, surfaces the arguments on the other side along with supporting authority, and condenses long complaints into something you can act on.
Westlaw Brief Builder gives litigators a controlled drafting workflow grounded in Westlaw and Practical Law. It verifies output against the law and the facts while you stay in charge of strategy and arguments. *(requires additional CoCounsel subscription)
Smart Browse takes you directly to the sections of a statute, regulation, or case that address your research question, and persistent context keeps that question attached as you move from document to document. The guidance follows your whole line of inquiry, so you spend less time reading material that does not bear on what you need.
Additional AI tools sharpen the work further. Claims Explorer takes the facts of your case and returns a list of relevant claims, with a link to search possible defenses. AI Jurisdictional Surveys build a comprehensive, current survey of the law across multiple jurisdictions, up to all 50 states, from a targeted query. Precision Research reveals case attributes for the topics in your plan, so you can narrow results by legal issue, fact pattern, cause of action, motion type, party type, and area of law. You can also get a simplified view of a lengthy docket, a summary of the negative KeyCite treatments of a case, and search and summarize specific secondary source content sets.
KeyCite verifies whether a case, statute, regulation, or administrative decision is still good law. KeyCite Cited With surfaces cases that are frequently cited together even when neither cites the other, which makes it easier to see how the law has developed. KeyCite Overruled in Part pinpoints the specific part of a case that has been invalidated, so the points that remain valid are not lost with it. KeyCite Overruling Risk warns you when a point of law in your case has been implicitly undermined by its reliance on an overruled or otherwise invalid prior decision.
Every capability draws on content Thomson Reuters publishes and edits, cited so you can open the source and read it yourself, rather than pulled from the open web. You stay in control of the analysis. For legal professionals who cannot afford to miss something, that is the difference.
Average Rating: 4.4/5.0
Total Reviews: 197
How Do G2 Users Rate Westlaw?
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Ease of Use: 8.6/10 (Category avg: 8.7/10)
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Quality of Support: 8.5/10 (Category avg: 8.7/10)
Who Is the Company Behind Westlaw?
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Seller: Thomson Reuters
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Company Website:
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Year Founded: 2008
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HQ Location: Toronto, CA
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Twitter: @thomsonreuters
150,224 Twitter followers
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LinkedIn® Page: www.linkedin.com
36,803 employees on LinkedIn®
Who Uses This Product?
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Who Uses This: Attorney, Paralegal
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Top Industries: Law Practice, Legal Services
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Company Size: 58% Small, 32% Medium
What Do G2 Reviewers Say About Westlaw?
AI-generated summary from verified user reviews
Pros
- Users appreciate the centralized management of Westlaw, benefiting from its AI and efficient research tools.
- Users find Westlaw's AI suite very helpful, especially for complex legal questions, providing generally good answers.
- Users find Westlaw's AI suite and deep research capabilities extremely helpful for complex legal inquiries.
- Users value the intuitive AI suite of Westlaw for providing clear answers to complex legal questions.
Cons
- Users note that document management requires attorney review, limiting the trust in the generated outputs from Westlaw.
What Are G2 Users Discussing About Westlaw?
