CoCounsel vs Eve (2026)

CoCounsel

by Thomson Reuters

Eve

by Butler Labs, Inc.

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

• ✓Built only for plaintiff firms and covers the case end to end: intake calls and signing, medical chronologies, demand letters, discovery, research and trial preparation in one platform, across five plaintiff practice areas.
• ✓Works without being prompted: Agents act on case updates, the Auditor reviews every case each night for missed value, and the intake voice agent answers calls 24/7 and syncs to Clio Grow, Lead Docket and SmartAdvocate.
• ✓Evidence beyond its own site: 51 G2 reviews at 4.9 out of 5 and a customer verdict reported by Law360 Pulse, plus named customer firms and SOC 2 Type 2 and HIPAA compliance on its trust page.

Limitations

• –No published prices: a call is needed for a quote, and the terms describe a platform fee tiered by matter count plus metered voice minutes and leads, with overages billed monthly, so total cost depends on volume.
• –Plaintiff side only: defense firms, transactional practices and in-house legal teams are outside its scope, and orders renew automatically for one-year terms unless cancelled at least 30 days before the term ends.
• –Eve does not say whether it trains its own models on customer data: the privacy policy bars its third-party LLM providers from training, but the terms are silent on Eve itself, and its open APIs and custom MCPs have no public documentation.