Lexis+ AI (with Protégé)
LexisNexis Legal & Professional (RELX) · HQ US · founded 1973 · Last checked 2026-09-03
Last checked = the date we last re-opened the vendor's published pages. Facts are what the vendor documents, not what it claims in marketing.
Generative-AI research and drafting assistant grounded in Lexis content with Shepard's citation validation; Protégé adds agentic workflows and user-selectable general models.
- Category
- Legal research · case-law research, Shepard's citation validation, drafting, agentic workflows (Protégé), Lexis Create+ Word add-in
- Built for
- Large firms, Mid-sized firms, Small firms & solos, In-house legal
- Model providers (disclosed)
- Anthropic, OpenAI, Mistral, Google
- Data residency options
- US
- Pricing
- enterprise
- Markets
- US, UK
- Last checked
- 03 Sept 2026
What the vendor documents
Recorded from the vendor's own trust, privacy and terms pages. "Not disclosed" means we found no public statement, not that the control is absent.
Accuracy evidence
- third-partyStanford RegLab 'Hallucination-Free?' study, May 2024 Lexis+ AI hallucinated on ~17% of 202 queries and was accurate on 65%; best of the three tools tested but contradicted 'hallucination-free' marketing.
- third-partyVals AI Legal Research benchmark, Oct 2025 (declined) LexisNexis declined to participate.
Related incidents
Ownership · Division of RELX plc; acquired Henchman (clause-level DMS indexing) in July 2024.
Sources
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Cite this record
SafeLegalAI Legal Tech Tools, "Lexis+ AI (with Protégé)", safelegalai.com/tools/lexis-plus-ai (last checked 2026-09-03, accessed 2026-09-04). Data: CC BY 4.0.
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