Westlaw vs Casetext
Side-by-side comparison of AI visibility scores, market position, and capabilities
Thomson Reuters (NYSE: TRI) Westlaw legal research platform with CoCounsel AI ($650M Casetext acquisition); KeyCite citation analysis competing with LexisNexis and Harvey.ai for attorney AI legal research market leadership.
About
Westlaw is a legal research platform owned by Thomson Reuters (NYSE: TRI) — a Toronto, Canada-based information and professional services company generating $6.8+ billion in annual revenue across legal, financial, and risk intelligence segments — providing attorneys, judges, law students, and legal researchers with the most comprehensive legal research database in the US and internationally, offering access to case law dating to the 1800s, statutes, regulations, administrative law, secondary sources (law review articles, practice guides, treatises), and the KeyCite citation analysis tool that verifies whether a legal precedent remains good law and identifies all citing references. Westlaw is one of the two dominant legal research platforms globally (alongside LexisNexis) with the subscription legal research market generating $5B+ annually from law firms, corporate legal departments, courts, and law schools.
AI legal research platform acquired by Thomson Reuters for $650M; CoCounsel AI integrated into Westlaw for case research, contract review, and deposition analysis.
About
Casetext is an AI legal research platform that pioneered AI-assisted legal research tools for attorneys, law students, and legal professionals before being acquired by Thomson Reuters in August 2023 for $650 million — one of the largest legal tech acquisitions in history. Founded in 2013 in San Francisco by Jake Heller and Pablo Arredondo, Casetext built the CARA AI tool (Context and Relevant Analysis) that analyzes uploaded legal briefs to find relevant case law the attorney may have missed, and CoCounsel — an AI legal assistant powered by GPT-4.
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