Westlaw

What it does

Westlaw is Thomson Reuters' legal research platform and the most widely used legal research service - providing access to case law, statutes, regulations, secondary sources, and legal news across all US jurisdictions and key international markets. Westlaw Precision and CoCounsel are Westlaw's AI capabilities. AI capabilities include CoCounsel AI that conducts legal research, drafts memos, and answers questions about uploaded documents using Westlaw's database, Westlaw Precision that uses AI to surface the most relevant cases and flag potentially negative treatment, AI-powered KeyCite that automatically identifies whether a case is still good law, intelligent search that understands legal concepts beyond keyword matching, AI document review that analyzes uploaded contracts and legal documents against research, and automated legal research memos that generate structured research summaries.

Strengths

• Mid-market law firms use Westlaw for firm-wide legal research - CoCounsel AI accelerating research across practice groups and AI document analysis supporting due diligence.
• Large law firms and corporate legal departments use Westlaw for enterprise legal research - comprehensive database access and CoCounsel AI supporting complex multi-jurisdiction research.
• Small law firms use Westlaw for professional legal research infrastructure - AI-powered search and KeyCite ensuring research quality and current law verification.
• Solo attorneys use Westlaw for comprehensive legal research - CoCounsel AI accelerating research tasks that would take hours manually.

Watch-outs

• LexisNexis is Westlaw's primary competitor with comparable coverage: LexisNexis offers comprehensive competing legal research with different database organization and pricing — legal professionals should evaluate both platforms for their practice area and workflow.
• Very high subscription cost particularly for small firms: Westlaw carries premium pricing — solo practitioners and small firms often find vLex, Fastcase, or Casetext offer sufficient research coverage at significantly lower cost.
• CoCounsel AI accuracy requires attorney verification: CoCounsel's AI research outputs must be verified by a licensed attorney — legal professionals cannot rely on AI research output without independent review given professional responsibility obligations.

Pricing

Westlaw pricing varies by practice size and access level. Not published. Law firm subscriptions typically $500 to $5,000+/month depending on access. Enterprise contracts negotiated.