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About
CoCounsel is Thomson Reuters' flagship generative AI platform purpose-built for legal, tax, and audit professionals. Available in two primary variants—CoCounsel Legal and CoCounsel Tax—the solution integrates directly with industry-leading Thomson Reuters products such as Westlaw, Practical Law, and ONESOURCE. CoCounsel Legal unifies legal research, contract drafting, and document analysis in one seamless experience. It leverages advanced AI trained on vast repositories of authoritative legal content and case law, enabling attorneys and legal teams to perform multistep legal work faster and with greater confidence. Law firms like Zarwin Baum and corporations like Brinks have used it to dramatically increase efficiency and improve client outcomes. CoCounsel Tax brings the same AI-first approach to tax practices, combining trustworthy answers, automation, and firm-specific knowledge to enhance accuracy, reduce risk, and boost client confidence. CoCounsel Audit supports accounting firms with smarter audit workflows. Designed for enterprise use, CoCounsel is ideal for law firms, corporate legal departments, tax and audit practices, and government organizations. It is trusted by professionals who require reliable, citation-backed outputs grounded in verified legal and regulatory content rather than open-web AI hallucinations. With integrations across the full Thomson Reuters product ecosystem, CoCounsel functions as a strategic AI layer across the entire professional workflow.
Key Features
- Unified Legal Research & Drafting: CoCounsel Legal combines Westlaw-powered legal research, contract drafting, and document analysis in a single AI-driven interface, eliminating the need to switch between tools.
- AI Trained on Authoritative Content: Unlike general-purpose AI, CoCounsel is trained on and grounded in Thomson Reuters' verified legal and tax content, reducing hallucinations and providing citable, trustworthy outputs.
- CoCounsel Tax Automation: CoCounsel Tax integrates firm knowledge, authoritative tax guidance, and automation to assist tax practitioners with research, review, and client advisory tasks.
- Document Analysis at Scale: Analyze contracts, filings, and legal documents rapidly, surfacing critical clauses, risks, and insights without manual review of every page.
- Enterprise Ecosystem Integration: Deeply integrated with Thomson Reuters products including Westlaw Edge, Practical Law, ONESOURCE, and HighQ for seamless workflows across legal and tax teams.
Use Cases
- A law firm associate uses CoCounsel Legal to conduct multi-issue legal research on Westlaw and generate a first draft memo in a fraction of the traditional time.
- A corporate legal team uses CoCounsel to review and analyze hundreds of vendor contracts, quickly flagging non-standard clauses and risk areas.
- A tax partner at a CPA firm uses CoCounsel Tax to answer complex client tax questions with authoritative citations and auto-drafted response summaries.
- An audit team uses CoCounsel Audit to streamline workpaper preparation and identify anomalies faster across large client datasets.
- A government legal department uses CoCounsel to research regulatory compliance requirements and draft policy guidance documents more efficiently.
Pros
- Grounded in Trusted Legal Content: Outputs are anchored in authoritative Thomson Reuters databases, making it far more reliable for professional use than general-purpose AI tools.
- End-to-End Workflow Coverage: Covers the full spectrum of legal and tax workflows—from research and drafting to document review and client advisory—within a single platform.
- Enterprise-Grade Security & Compliance: Built for regulated industries with the data governance, security standards, and compliance controls that law firms and corporations require.
Cons
- Enterprise Pricing: CoCounsel is a premium, subscription-based enterprise product with no free tier, making it inaccessible to solo practitioners or small firms with tight budgets.
- Locked into Thomson Reuters Ecosystem: Full value is realized only when combined with other Thomson Reuters products like Westlaw and Practical Law, creating significant vendor lock-in.
- Primarily U.S.-Focused Legal Content: While expanding globally, the breadth of authoritative content is strongest for U.S. legal and tax practice areas, which may limit utility for international users.
Frequently Asked Questions
What is CoCounsel?
CoCounsel is Thomson Reuters' generative AI assistant for legal, tax, and audit professionals. It provides AI-powered research, drafting, document analysis, and advisory assistance grounded in authoritative Thomson Reuters content.
How is CoCounsel different from general AI tools like ChatGPT?
Unlike general-purpose AI, CoCounsel is specifically trained on and retrieves from verified legal, regulatory, and tax content curated by Thomson Reuters experts. This dramatically reduces the risk of hallucinations and ensures outputs are citable and professionally reliable.
Who is CoCounsel designed for?
CoCounsel is designed for legal professionals at law firms and corporate legal departments (CoCounsel Legal), tax practitioners and CPAs (CoCounsel Tax), and auditors (CoCounsel Audit).
Does CoCounsel integrate with existing Thomson Reuters products?
Yes. CoCounsel integrates deeply with Westlaw, Practical Law, ONESOURCE, HighQ, and other Thomson Reuters products, acting as an AI layer that enhances existing professional workflows.
How is CoCounsel priced?
CoCounsel is an enterprise subscription product. Pricing varies by product variant (Legal, Tax, Audit) and firm size. Prospective customers should contact Thomson Reuters sales directly for a quote.
