Lex Machina is a legal analytics platform from LexisNexis that turns court documents into data on judges, counsel, parties, and outcomes.
Overview #
Lex Machina #
Lex Machina is a legal analytics platform from LexisNexis that converts raw court filings into structured data about how judges, courts, counsel, parties, and expert witnesses have actually behaved. Instead of reading dockets, you ask Lex Machina about the history: how long a judge takes to rule on a motion type, how often a firm wins summary judgment, what damages a court has awarded in cases like yours, and how a party has fared as plaintiff versus defendant. The database covers 45M documents across more than ten million cases in all 94 federal district courts, 13 courts of appeal, PTAB, specialty venues, and enhanced state courts, with an additional 18M state cases for party analytics. Lex Machina combines proprietary extraction with AI-assisted attorney review to fill gaps in court records, and as of 2026 the Protégé layer lets you request that data in a plain-language prompt.
Production credibility: Site states it is trusted by over 90% of the largest firms (per the 2025 Law360 Pulse Leaderboard and AmLaw 100 lists, data as of April 2025); 2025 CODiE Award for Best Data Analytics & Insight Solution and 2025 LegalTech Breakthrough Award; part of LexisNexis (RELX) with its Responsible AI framework and no training on customer data.
Key Features
- Judge, court, counsel, party, and expert-witness analytics across 10M+ federal and enhanced state cases
- Timing Events and event-to-event analytics for how long courts take to reach key milestones
- State Court Motion Metrics covering 40+ motion types by judge and court
- Legal Findings tied to judgment events, with damages, resolutions, and class action settlement data
- Appeals Analytics for all federal civil appeals since 2012, including reversal rates
- Legal Entity Analytics that reads signature blocks and groups related entities for a full relationship view
- Protégé generative prompts that return structured analytics from a natural-language question
- API for building litigation data into internal tools; integrations with Lexis+, CourtLink, Law360, and CaseMap+
Ideal Use Case
Litigators sizing up opposing counsel or a judge before a motion, in-house counsel choosing and benchmarking outside firms, and business development teams prospecting by litigation exposure. Insurers, courts, government bodies, and law schools are also listed users. Choose Lex Machina over docket search when the question is what usually happens here rather than what was filed.
How Lex Machina differentiates
Docket services tell you what exists; Lex Machina's value is the structured layer on top, built by extraction plus attorney review, so findings, damages, and outcomes are queryable fields rather than PDFs to read. The breadth of federal coverage plus enhanced state courts and the entity-resolution work on firms and parties are hard for a startup to replicate. The trade-off is cost and access: it is an enterprise LexisNexis product with demo-gated pricing, no self-serve tier, and a form that feeds you into the wider Lexis sales motion. The generative features run through Protégé, so firms standardizing on a different AI assistant will be using two systems.
FAQ
Q: What courts does Lex Machina cover? A: All 94 federal district courts, the 13 federal courts of appeal, PTAB, specialty venues, and a growing set of enhanced state courts, plus 18M additional state cases for party analytics.
Q: How does Lex Machina compare to Westlaw Litigation Analytics? A: Both attach analytics to major research platforms; Lex Machina, inside LexisNexis, emphasizes attorney-reviewed findings, damages, and timing data with an API, while Westlaw's analytics sit inside Westlaw Edge. Most firms choose based on which research platform they already license.
Q: Is Lex Machina an AI tool? A: Yes in two ways: proprietary AI plus attorney review builds the structured dataset, and the Protégé assistant answers natural-language prompts against it. LexisNexis states customer data is never used to train models.
Q: Who uses Lex Machina besides law firms? A: Corporate legal departments, insurers, courts and judges, state, local, and federal government, and law schools are all listed as user groups.
Q: Does Lex Machina offer a free trial? A: No self-serve trial; the site offers a free guided demo with an analytics expert, and pricing is quoted by sales.
tl;dr
Lex Machina is LexisNexis's litigation analytics database: judge, counsel, party, damages, and timing data from 10M+ cases, now queryable through Protégé prompts. The reference product in its niche; enterprise pricing and demo-gated access.
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