CoCounsel

CoCounsel is a professional-grade AI legal assistant from Casetext and Thomson Reuters that drafts, reviews, and researches with attorney-level reliability.

Overview

CoCounsel is one of the earliest AI legal assistants built specifically for lawyers, combining large language models with legal research databases and human-verified sources. It performs core legal tasks — legal research, document review, deposition preparation, contract analysis, and timeline generation — and returns results with citations attorneys can check. Built on GPT-class models and refined through legal-specific training, it is designed to reduce associate-level work from days to minutes. Law firms and corporate legal departments use CoCounsel to accelerate research and drafting while keeping professional oversight in the loop.

What distinguishes CoCounsel in daily practice is confidence in its output: answers arrive with citations attorneys can open and verify, which changes how quickly lawyers trust and delegate research tasks. Common workflows include scoping a legal question in minutes rather than days, reviewing contracts against a checklist, and building deposition timelines from voluminous transcripts. Because it runs within Thomson Reuters’ professional security and data framework, firms can use it on privileged material without the governance headaches of consumer AI tools. The learning curve is modest — tasks are phrased in plain language — but the quality of output depends on how precisely lawyers scope requests, a skill firms typically build through guided rollout. For associates, it removes much of the drudgery that once defined early-career legal work.

Key Features

• Legal research with citations to verifiable primary and secondary sources
• Document review and contract analysis with risk flagging and summaries
• Deposition and trial preparation, including chronology and timeline generation
• Drafting assistance for memos, correspondence, and routine legal documents
• Secure handling of privileged material with firm-grade data protections
• Integration with Westlaw and Thomson Reuters legal research workflows

Pricing

CoCounsel is sold through Thomson Reuters as a paid professional subscription, with pricing dependent on firm size and the modules licensed. Individual practitioners and large firms can both be provisioned, typically through annual contracts with onboarding support.

Who Is It For

It is built for practicing attorneys, law firms, and in-house legal teams that need AI assistance grounded in authoritative legal sources rather than open-web generation. Litigation, transactional, and research teams all benefit from the time saved on first-draft work.

FAQ

Is CoCounsel free to use?

No. CoCounsel is a paid professional product sold through Thomson Reuters subscriptions, though demos and trial access are available to qualifying firms. Its pricing reflects the verified legal research and enterprise security backing the assistant.

Does CoCounsel offer an API?

CoCounsel is delivered as a professional application with integrations into Thomson Reuters products rather than a general public API. Larger legal departments can arrange enterprise integration and data-handling configurations during onboarding.

How does CoCounsel compare to alternatives?

Compared with general chatbots, CoCounsel grounds answers in legal research sources and is built for attorney workflows with citations. Versus Harvey or Spellbook, CoCounsel’s strength is its Westlaw-grade research backing and long track record in legal practice.