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What is Westlaw?

Westlaw is a comprehensive legal research and analytics platform developed by Thomson Reuters for attorneys, legal researchers, government agencies, and corporate legal departments. The platform provides searchable access to case law, statutes, regulations, administrative decisions, and secondary legal materials used in legal research and litigation preparation. Its search technology allows users to locate relevant authorities through natural language queries, Boolean searches, citations, and subject-based navigation. The West Key Number System organizes legal principles into a structured classification system that helps researchers identify related cases addressing specific legal issues. Attorney-written headnotes and editorial summaries provide additional context for evaluating court decisions and understanding their legal significance. KeyCite enables users to verify the validity of cases, statutes, and regulations while reviewing citing references, subsequent treatment, and potential overruling risks. Westlaw Edge includes AI-assisted research that generates synthesized answers grounded in Westlaw content and links users to supporting legal authorities. Quick Check analyzes uploaded briefs and other legal documents to identify potentially invalid citations, overlooked precedents, and authorities that may weaken an argument. Litigation Analytics provides data-driven insights into judges, courts, attorneys, law firms, case outcomes, and damages to support litigation strategy and case evaluation. Additional capabilities include AI Jurisdictional Surveys, Statutes Compare, Regulations Compare, and precision research tools for investigating legal issues across jurisdictions. Westlaw Advantage extends the platform with agentic AI capabilities, Deep Research, litigation document analysis, and research workflows designed to help legal professionals move from finding relevant authorities to developing legal strategies.

What is Astra for Law?

Astra for Law stands out as a cutting-edge AI platform aimed at legal firms and tech providers, facilitating the creation of tailored products and workflows that utilize their legal knowledge. By incorporating the features of GPT-6 Astra with distinct settings, tools, and contextual components specifically crafted for the legal sector, it offers a robust legal search index alongside support for legal analysis and writing tasks. This platform excels at navigating U.S. case law, statutes, regulations, court rules, and administrative decisions, tapping into a vast database of over 230 million continuously updated URLs. Its core purpose is to pinpoint relevant authorities and excerpts, assess their significance and binding nature, and effectively apply this research to diverse client-related facts, arguments, deal terms, and strategic legal considerations. Furthermore, it provides customized instructions to help distinguish between court rulings and ancillary remarks, address authorities that could weaken an argument, clarify contractual risks, and identify areas of ambiguity. Legal firms can adjust their workflows to reflect their own precedents, methodologies, proprietary information, trusted sources, and review protocols, ensuring a bespoke approach to legal tasks that boosts both efficiency and effectiveness. This high degree of customization not only allows firms to uphold their distinctive practices but also enables them to harness the power of advanced AI tools to enhance their overall service delivery. Ultimately, Astra for Law empowers legal professionals to navigate the complexities of the legal landscape with greater confidence and precision.

Media

Media

Integrations Supported

Deadline Assistant
OpenAdapt

Integrations Supported

GPT-6 Astra
GPT-6 Luna
GPT-6 Sol
GPT-6.1 Sol
Harvey AI
Holo4
Legora
OpenAI
OpenAI Bel

API Availability

API Availability

Has API

Pricing Information

$75 per month

Pricing Information

Pricing not provided
Free Version

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

Thomson Reuters

Date Founded

2008

Company Location

Canada

Company Website

legal.thomsonreuters.com/en/westlaw

Company Facts

Organization Name

OpenAI

Date Founded

2015

Company Location

United States

Company Website

openai.com/index/astra-for-law/

Categories and Features

Legal

Not specified

Legal Research

Not specified

Personal Injury Law

Not specified

Categories and Features

AI Legal

Not specified

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