Overview
Lexis+ AI is LexisNexis's generative AI legal research and drafting platform, combining conversational AI with the full depth of the Lexis legal database. Attorneys submit complex legal questions in plain language and receive synthesized answers with citations to verified cases, statutes, and regulations — eliminating the manual assembly of research results that traditional legal research requires. The platform is built on top of LexisNexis's curated content library rather than the open web, reducing hallucination risk significantly. Every answer includes source citations attorneys can verify against the underlying primary authority. Lexis+ AI's drafting tools help attorneys generate first-draft contracts, briefs, and correspondence from prompts, pulling relevant legal authority directly into the output. Summarization features condense long documents — depositions, expert reports, lengthy contracts — into structured summaries tailored to the attorney's specific questions. The platform also includes AI for Litigation Analytics, which surfaces predictive insights about judge behavior, opposing counsel tendencies, and case outcomes based on historical data. Lexis+ AI is available as an add-on to existing Lexis+ subscriptions and is most valuable for litigation teams and transactional attorneys who do high volumes of legal research and drafting.
Key features
Conversational Legal Research
Ask legal questions in plain English and receive answers with citations to Shepardized cases and statutes. Significantly faster than Boolean keyword searching for initial research.
Jurisdiction Comparison
Ask 'How do courts in the Second and Ninth Circuits treat X?' in a single query. Lexis+ AI compares legal standards across jurisdictions and surfaces relevant authorities from each.
Case Summarization
Upload or select a case and receive a structured summary of facts, holding, and reasoning. Reduces time spent reading full opinions to identify relevant precedent.
Research Memo Drafting
Generate a structured research memo draft from a research question, with citations. Requires attorney review and editing but eliminates the blank-page problem for initial drafts.
Shepardized Citations
All cited authorities carry Shepard's status signals, so attorneys can verify citation validity without leaving the AI interface.
Document Upload and Q&A
Upload documents and ask questions about their content — useful for reading large records, analyzing contracts, or reviewing discovery materials.
Pros and cons
Pros
- AI answers are grounded in the LexisNexis database and cite Shepardized authorities — lower hallucination risk than general-purpose AI
- Conversational research interface reduces time spent writing Boolean queries
- Jurisdiction comparison lets attorneys research how different states treat the same legal issue in one prompt
- Integrated with LexisNexis — no separate account or context-switching
- Document summarization and research memo drafting reduce time on preliminary research tasks
Cons
- Sold as an add-on to an already-expensive LexisNexis subscription — total cost is high
- AI answers still require attorney verification — cannot be relied on without review
- Lags CoCounsel on document review and contract analysis capabilities
- No published pricing — requires separate sales conversation on top of base LexisNexis contract
- Only works within the LexisNexis ecosystem — firms on Westlaw-only subscriptions cannot use it
Pricing
Pricing current as of May 2026; verify with vendor before purchasing.
Who it's best for
Best fit for
- LexisNexis subscribers wanting AI-accelerated research without leaving their existing platform
- Litigators who conduct heavy multi-jurisdiction research and want faster synthesis
- Associates doing initial research who need a structured starting point before deeper review
- Firms that have already evaluated and declined Harvey or CoCounsel on cost grounds
Not a fit for
- Firms on Westlaw-only subscriptions (use CoCounsel instead)
- Attorneys needing document review and contract analysis AI (Harvey or CoCounsel are stronger)
- Solo and small firm attorneys who cannot justify the add-on cost
- Anyone expecting AI answers without attorney verification — not suitable for that use case
Frequently asked questions
LexisNexis does not publish Lexis+ AI pricing. It is sold as a premium add-on to the standard LexisNexis subscription. Contact LexisNexis sales for firm-specific pricing.
More accurate than general-purpose AI tools like ChatGPT for legal research because it is grounded in the LexisNexis database and cites Shepardized authorities. However, attorney review is required — AI legal research tools are not yet reliable enough to use without verification.
Both are AI legal research assistants grounded in legal databases with citation verification. CoCounsel is integrated with Westlaw; Lexis+ AI is integrated with LexisNexis. CoCounsel is generally considered stronger for document review and contract analysis. Lexis+ AI is competitive for case law research within the LexisNexis ecosystem.
Yes. Lexis+ AI is an add-on to the core LexisNexis subscription, not a standalone product.
Harvey is a general-purpose legal AI for drafting, research, and due diligence, used primarily by BigLaw. Lexis+ AI is more narrowly focused on legal research within the LexisNexis database. Harvey has broader capabilities; Lexis+ AI has tighter citation grounding for research tasks.