Lexis+ with Protégé vs CoCounsel

Tagline

Legal AI solution built for drafting, research, and analysis powered by LexisNexis Protégé

Trusted legal AI assistant by Thomson Reuters

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Pricing

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Platforms

API

Open source

Description

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.

CoCounsel drafts, reviews, and researches legal documents with citation-grade accuracy.

Key features

• 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

• Citation graphs
• Memo drafts

Pros

• 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.

• Legal-domain trained
• Thomson Reuters backing
• Westlaw citation grounding
• Deep contract review
• Deposition prep
• Legal research automation
• Enterprise security
• Multi-jurisdiction support

Cons

• 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.

• Expensive enterprise pricing
• US law primary focus
• Requires TR ecosystem
• Not for solo practitioners
• Slow onboarding
• Limited customization
• Occasional citation errors
• Steep learning curve

Pricing plans

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