Harvey vs Lexis+ with Protégé
A 2026 side-by-side comparison of Harvey and Lexis+ with Protégé — pricing, key features, platforms, API access, and the trade-offs of each, based on data collected from their official sites.
Harvey
Domain-specific AI for elite law firms
Lexis+ with Protégé
Legal AI solution built for drafting, research, and analysis powered by LexisNexis Protégé
Tagline
Domain-specific AI for elite law firms
Legal AI solution built for drafting, research, and analysis powered by LexisNexis Protégé
Pricing
Rating
Platforms
API
Open source
Description
Harvey builds legal-grade generative AI trained on case law, deals, and contracts.
Lexis+ with Protégé is an advanced legal AI solution that combines the Protégé AI assistant with trusted LexisNexis content and purpose-built workflows. Designed to help legal professionals deliver complex work with confidence, it accelerates legal research, supports agentic document drafting, integrates with Microsoft 365 and major Document Management Systems, and provides citation validation via Shepard's.
Key features
- Playbook enforcement
- Version diffs
- Approval workflows
- AI Assitant (Protégé)
- Agentic Legal AI Drafting
- Legal AI Research & Strategy Tool
- Shepard's Citations Validation
- Secure Document Vault
- DMS Integration (iManage, NetDocuments, SharePoint)
- Microsoft 365 Copilot Integration
- Access to OpenAI & Anthropic Models
- Custom Workflows & Legal Skills
- AI-Generated Summaries & Case Timelines
- Voice-to-Text Prompting
Pros
- Purpose-built for legal work
- Trained on case law and contracts
- Enterprise security and SOC 2
- Integrations with iManage and NetDocs
- Multi-jurisdiction legal support
- Citation-grade accuracy
- White-glove onboarding
- Custom firm training
- Integrates with popular DMS platforms like iManage, SharePoint, and NetDocuments to leverage internal knowledge.
- Uses Shepard's signals to validate citations and verify the treatment of legal authorities directly within your workflow.
- Supports agentic drafting where users can review and approve a step-by-step proposed AI plan before the work begins.
- Seamlessly connects with Microsoft 365 apps including Teams, Word, Excel, and Outlook.
- Provides access to leading AI models from partners like Anthropic and OpenAI in a single secure ecosystem.
- Strictly keeps customer data private and does not use it to train public or external AI models.
- Offers a secure Vault to upload, store, organize, and analyze large document collections.
- Includes exclusive expert-authored practice notes and secondary sources spanning 25 practice areas.
Cons
- Enterprise-only pricing
- No self-serve signup
- Waitlist for access
- Not for solo practitioners
- US and UK focus
- Requires firm-scale deployment
- Little public documentation
- Expensive per seat
- Pricing details are not publicly disclosed on the website, requiring a direct quote request.
- Document Management System integrations require specific subscriptions, permissions, and separate setup.
- No public API or developer-facing integration documentation is referenceable on the product pages.
- Human legal professionals remain completely responsible for judgment, review, strategy, and final approval of AI-generated drafts.
- Functions strictly within the cloud-based LexisNexis ecosystem with no mention of self-hosted offline deployment options.
Pricing plans
Which one should you pick?
- Choose Harvey if you need Playbook enforcement and API access.
- Choose Lexis+ with Protégé if you need AI Assitant (Protégé).
- On budget: Harvey is paid, Lexis+ with Protégé is freemium.