CoCounsel vs Lexis+ with Protégé (2026)

CoCounsel

by Thomson Reuters

Lexis+ with Protégé

by LexisNexis

Pros

• ✓Grounded in Thomson Reuters' own content: CoCounsel Legal reasons from Westlaw and Practical Law plus a firm's documents, showing its step-by-step reasoning with linked citations to verify.
• ✓Handles volume and drafting: Tabular Analysis runs up to 100 questions across 10,000 documents, Westlaw Brief Builder drafts litigation briefs, and it works inside Word, Outlook, Teams and, through a pilot MCP connector, Claude.
• ✓Published online pricing for smaller firms, with CoCounsel Essentials from $360/mo billed annually, and 116 G2 reviews at 4.7 out of 5, plus a trust profile listing SOC 2 Type II, ISO 27001 and ISO 42001.

Limitations

• –Built around the Thomson Reuters stack: the full CoCounsel Legal plan bundles Westlaw Advantage and Practical Law at $784 per attorney per month on a one-year plan, which firms committed to another research platform may not need.
• –Online pricing stops at 10 attorneys and plans run for one to three years with no month-to-month option, so larger firms and corporate legal departments need a sales conversation.
• –The Claude MCP connector is a pilot that Thomson Reuters may withdraw without notice, its terms bar using Thomson Reuters content with other professional AI tools through an MCP, and no public developer API is published.

Pros

• ✓Outputs are grounded in LexisNexis's legal content collection with Shepard's Citations validation, so citations come with status and treatment signals rather than potential AI hallucinations.
• ✓Protégé Work orchestrates multi-step legal tasks through structured plans with visibility and control at each stage, and hundreds of pre-built workflows plus a no-code Custom Workflow Builder for firm-specific playbooks.
• ✓Integrates across Microsoft 365 (Word, Excel, PowerPoint, OneNote, Teams, Outlook), iManage, SharePoint, OpenText and Google Drive, with OpenAI and Anthropic as named LLM partners, so AI works inside existing legal workflows rather than requiring tool switching.

Limitations

• –Pricing is quoted per organization and varies with size, capabilities and content access, so a buyer needs a LexisNexis quote. The Forrester TEI studies, commissioned by LexisNexis, model ROI but publish no subscription price.
• –Several capabilities are scoped by region or still to come: Mistral models are specific to the France edition, Arabic and English case translation to the Middle East edition, LexisNexis models are due for preview later in 2026, and customer-created skills are coming.
• –The G2 profile still carries the former Lexis+ AI name and holds only a handful of reviews since the February 2026 rebrand.