Lexis+ AI with Protégé is LexisNexis' AI assistant for legal research, drafting and document review, tied to Lexis content and Shepard's citation checks. It is a strong choice for firms already paying for Lexis+, and a real alternative to CoCounsel. Pricing is custom and not published, third party estimates run into hundreds of dollars per seat each month, and like every legal AI tool it still makes mistakes you must catch.
What Lexis+ AI with Protégé is
Protégé is the AI assistant built into LexisNexis legal products, including Lexis+ AI. LexisNexis says it is included within supported LexisNexis solutions and is not sold as a standalone product LexisNexis Protégé ↗.
It drafts litigation and transactional documents, summarizes documents and search results, answers research questions, and links answers to legal sources you can check with Shepard's LexisNexis Protégé ↗. A secure Vault lets you upload and analyze your own documents, and newer agent features let teams build, share and run reusable AI skills and compare terms across large document sets LexisNexis Protégé ↗.
LexisNexis says Protégé won a 2025 CODiE Award for Best AI Tool for Lawyers LexisNexis Protégé ↗. Hands on testing is in progress.
What it does well
Answers grounded in Lexis content. LexisNexis says Protégé is the only AI assistant with direct access to exclusive LexisNexis sources LexisNexis Protégé ↗. For firms that already trust Lexis for research, that makes its answers easier to check.
Shepard's checks. Linked sources can be verified with Shepard's, which helps you spot bad law before it reaches a brief LexisNexis Protégé ↗.
Works where lawyers work. Protégé connects to Word, Outlook, Teams, Excel, PowerPoint and OneNote, and offers a custom agent inside Microsoft 365 Copilot LexisNexis Protégé ↗.
Drafts in your style. You can draft from your organization's documents and personalize the drafting style LexisNexis Protégé ↗.
Better accuracy than older tools in one study. In a Stanford study published in the Journal of Empirical Legal Studies, Lexis+ AI gave accurate answers to 65 percent of queries, compared with 41 percent for Westlaw AI Assisted Research Stanford study ↗.
Privacy commitments. LexisNexis says it never uses customer data to train AI models, removes identifiable information from AI interactions, and runs regular third party audits LexisNexis Protégé ↗.
Where it falls short
It still gets things wrong. The same Stanford study found Lexis+ AI hallucinated in more than 1 in 6 queries Stanford HAI ↗ Stanford study ↗. Every citation still needs a lawyer's review.
No published price. LexisNexis says pricing is customized based on organization size, practice needs and subscription LexisNexis Protégé ↗. That makes budgeting and comparison hard.
It is expensive. Third party estimates put an all in Lexis+ AI or Protégé seat at roughly $250 to $500 per month, depending on content and firm size Vaquill pricing analysis ↗. These are not official rates.
Contract terms need care. Contracts are typically annual and often auto renew, and Spellbook, a competitor, reports renewal notices arrive 60 days before expiry, with 3 to 7 percent yearly increases common unless negotiated Vaquill pricing analysis ↗ Spellbook pricing guide ↗.
Best value only inside the Lexis world. Since Protégé is not sold on its own, firms on Westlaw or with no research subscription pay for much more than the AI LexisNexis Protégé ↗.
Pricing and plans
Official pricing: customized and not published. Call LexisNexis or request a quote LexisNexis Protégé ↗.
Base Lexis+ for 1 to 3 attorneys, per Spellbook: Essential from $114 a month on a 3 year term or $152 on 1 year; Enhanced $257 or $342; Professional $324 or $432 Spellbook pricing guide ↗. Firms with 4 or more attorneys get no published rates Spellbook pricing guide ↗.
AI estimates: Spellbook reports the Lexis+ AI add on at about $125 to $275 per user per month on top of Lexis+, and Protégé bundles at $128 to $494 Spellbook pricing guide ↗. Vaquill cites an all in range of about $250 to $500 per seat per month Vaquill pricing analysis ↗. Both sources sell competing products, so treat these as rough guides.
Trial: LexisNexis offers a trial request form LexisNexis Protégé ↗. Spellbook reports a 7 day trial with no credit card for base Lexis+ Spellbook pricing guide ↗.
Billing notes: multi year terms bring discounts, reported at 10 percent for 2 years and 25 percent for 3 years Spellbook pricing guide ↗. Start renewal talks 90 to 120 days before expiry Spellbook pricing guide ↗.
Who should (and shouldn't) use it
- Good fit: firms already on Lexis+ that want AI research and drafting tied to the same content.
- Good fit: litigators who rely on Shepard's and want it built into AI answers.
- Good fit: firms that work in Microsoft 365 all day.
- Skip it if: you are a solo or small firm on a tight budget with no Lexis subscription.
- Skip it if: your firm uses Westlaw; CoCounsel fits better.
- Skip it if: you need published, predictable pricing before you talk to sales.
Alternatives worth a look
- CoCounsel Legal: Thomson Reuters' assistant grounded in Westlaw and Practical Law, our top pick for small firms CoCounsel Legal ↗.
- Clio Work: legal AI workspace that connects to Clio Manage, with a free trial Clio Work pricing ↗.
- Spellbook: AI contract review and drafting inside Word, with a 7 day free trial Spellbook pricing ↗.
Where it appears
ComparedThe Best AI Tools for Lawyers at Small FirmsWhat’s good
- Shepard's verification
- Microsoft 365 integration
- Trial available
What to know
- No published price
- Errors found in Stanford study
Key features
- Drafting litigation and transactional documents
- Summaries of documents and results
- Shepard's source verification
- Vault for document analysis
- Microsoft 365 integration
Works with
Questions people ask
How much does Lexis+ AI cost?
LexisNexis does not publish prices LexisNexis Protégé ↗. Third party estimates put a Lexis+ AI or Protégé seat at roughly $250 to $500 per month Vaquill pricing analysis ↗.
Is there a free trial of Lexis+ AI?
LexisNexis lets you request a trial through a form on the Protégé page LexisNexis Protégé ↗.
Does Lexis+ AI hallucinate?
Yes, sometimes. A Stanford study found it produced hallucinated answers in more than 1 in 6 queries Stanford HAI ↗ Stanford study ↗.
Is Lexis+ AI better than Westlaw's AI?
In the Stanford study, Lexis+ AI answered 65 percent of queries accurately, against 41 percent for Westlaw AI Assisted Research Stanford study ↗. Thomson Reuters has since launched CoCounsel Legal, which that study did not test CoCounsel Legal ↗.
Where this comes from
Checked Oct 9, 2026. Vendor pages describe their own products; independent sources add outside views. Hands on testing is in progress.
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