Lexis+ AI
LexisNexis AI built on 50 years of legal content — research smarter draft with cited authority and validate every reference with Shepard's without leaving your research platform.
About Lexis+ with Protg (formerly Lexis+ AI) The LexisNexis solution Lexis+ with Protg, formerly known as Lexis+ AI and rebranded last month (February 2026), is the AI component overlay on the LexisNexis legal research platform. Context – If you are a legal researcher already paying for LexisNexis and have been for years to obtain citation grounding from its 50-plus-year cache of legal research, the context for Protg makes it more compelling. The Protg assistant will help you identify appropriate legal research authority by asking for plain language; summarize what the authority says; and present cited material in the same manner Lexis Nexis has historically, by listing verifiable legal citations, and before that presenting those with valid Shepard's cites for authenticity. With this grounding for legal accuracy, Lexis's AI assistant can avoid the risks inherent to more general AI assistants like ChatGPT that often "hallucinate" legal citations for real but nonexistent cases or legal precedent. The Protg Vault feature allows lawyers working on transactional documents to use Lexis Nexis to analyze and interpret their own documents within this research framework. Candid evaluation scope—LeisNexis with Protg is now a tool to support the legal researcher and legal drafting practice. The new tool does not offer solutions for contract lifecycle management, client onboarding workflows, or any other client services approval routing. Any litigants and/or researchers with existing LexisNexis licensing will see substantial additions of artificial intelligence tools upon subscription of that technology against infrastructure where you'll likely already be doing business as it is. For groups not yet subscribing to a LexisNexis product with AI capabilities, the added expenses for AI will reflect the overall subscription of the entire LexisNexis platform for legal researchers.
- Category: Legal Assistants
- Pricing: Paid
- Rating: 4.5 / 5 (0 reviews)
- Platforms: Web, iOS, Android
Key features
- Protégé AI assistant — Personalized AI that handles legal research questions drafting assistance and document summarization grounded in the LexisNexis content library
- Shepard's citation validation — Verifies every cited case against Shepard's to confirm citation is still good law before surfacing it in research outputs
- Conversational search — Ask legal research questions in plain language and get structured answers with cited authority rather than returning a list of raw case hits
- Protégé Vault — Secure document upload and analysis feature for transactional attorneys who need to analyze their own documents alongside research
- 50 plus year content library — Research draws from LexisNexis archive of case law statutes regulations secondary sources and legal news
- Drafting assistance — Generates first-draft legal language for memos briefs and documents with cited authority integrated into the draft
- Brief analysis — Reviews legal briefs against relevant case law and flags unsupported arguments or citation gaps
- Mobile access — Available on iOS and Android for on-the-go legal research and document review
Pros & Cons
Pros
- Shepard's citation validation prevents the hallucinated case references that make general AI tools unreliable for professional legal research
- Grounded in a 50-plus year LexisNexis content library that litigation-focused practitioners already know and trust
- A Forrester-commissioned study calculated 284 percent ROI over three years for corporate legal users of the LexisNexis platform
- Seamless for teams already licensed on LexisNexis since Protégé adds AI capabilities on top of infrastructure already in use
- Available on iOS and Android for mobile research access without being limited to a desktop interface
Cons
- Requires a LexisNexis subscription to access the AI layer which significantly increases total cost for teams not already licensed on the platform
- Does not offer AI-driven contract analysis or clause-level contract review which limits usefulness for transactional practices focused on drafting and negotiation
- Pricing for the AI add-on is not publicly listed and is quoted through LexisNexis sales adding friction to the evaluation process
- Strong for litigation and research-heavy workflows but less compelling for in-house legal teams focused on contract operations rather than case law research