Lex Machina AI features and pricing (October 2026)

Lex Machina is a legal analytics platform from LexisNexis that turns US court records into structured data. Litigators, corporate legal departments and insurers use it to study judges, counsel, parties and case outcomes before choosing strategy.

Lex Machina belongs to LexisNexis, a business of RELX. According to the vendor, its database holds 45 million documents across more than ten million cases, with 8,000 judges and 6,000 expert witnesses, covering all 94 federal district courts, 13 courts of appeal, the PTAB and selected state courts. Modules include legal findings, timing events, motion metrics, appeals analytics and class action analytics, and an API lets teams build their own tools. Users are law firms, corporate legal departments, insurers, courts, government and law schools. The vendor says it is trusted by over 90 percent of the largest law firms, based on April 2025 data.

• Queries court data with promptsLex Machina with Protégé lets users type a prompt and receive answers drawn from structured legal analytics rather than raw text. Litigators reach judge, party and motion data faster, without building filters by hand for each question.
• Links entities across casesLegal Entity Analytics uses proprietary AI to read signature blocks, update case data and group related entities. The result is a cleaner view of law firms, attorneys, parties and judges, which helps with assessing outside counsel or prospecting for clients.
• Structures documents with attorney reviewAI-assisted attorney review converts raw legal documents into data sets and fills gaps in court records, according to the vendor. Teams get findings, damages and resolutions as searchable fields that go beyond a plain docket list.
• Summarizes court and docket searchesAI summaries of court and docket searches give a quick read of what a search returned. Litigation teams can scan results first and open source documents only for the matters that matter to strategy.

• Coverage spans all 94 US federal district courts, 13 courts of appeal and the PTAB, with additional state cases for party analytics.
• Data is built with attorney review of documents, and an API lets teams integrate litigation data into their own solutions.
• LexisNexis states it never uses customer data to train AI models and follows the RELX Responsible AI Framework.

Lex Machina states coverage of all 94 US federal district courts, 13 courts of appeal and the PTAB, plus selected state courts; the data is built around US law.

Pricing and data hosting are not published, so request a quote and ask about licensing for your user count. Check coverage for your courts and practice areas, because state court depth varies. Verify AI answers against source documents: ABA Formal Opinion 512 (July 2024) covers competence and confidentiality when lawyers use generative AI. Ask for the LexisNexis security documentation and DPA.

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