Thomson Reuters CoCounsel
LegalThomson Reuters
CoCounsel is Thomson Reuters' legal AI. It answers legal research questions from Westlaw, drafts in Word and reviews documents, and shows the sources behind each answer.
- Built on Westlaw
- Works in Word
- Published prices for small firms
At a glance
More than 1 million professionals use CoCounselVerifiedAs of Aug 20, 2026Thomson Reuters press release
From $784 per attorney per month (firms up to 10)Reported As of Oct 9, 2026
Evidence notes
- Evidence level: Verified, primary.
- Many firms already hold the Westlaw contract. Thomson Reuters publishes a price for small firms.
- Across legal, tax and audit in 107 countries. Not legal-only.
- From $784 per attorney per month (firms up to 10). One-year term, all states plus federal, new customers. Read from a third party’s page. Larger firms get a quote.
Key facts
As of Nov 11, 2026
- Who it's for
- Firms and legal departments that already use Westlaw or Practical Law and want the AI on the same content.
- What does it do?
- Agentic research, drafting and verification grounded in Westlaw and Practical Law. It includes a drafting agent inside Microsoft Word and Tabular Analysis, which reviews up to 10,000 documents against up to 100 questions.
- How is it priced?
- For firms of up to 10 attorneys, one attorney with all states plus federal costs $784 a month on a one-year term, $637 on three years. Larger firms and existing customers get a quote. These figures are read from a third party's page and Thomson Reuters' sales page.
- Which models does it use?
- Built on Anthropic's Claude Agent SDK, with Thomson Reuters' own legal-focused model for document analysis.
- What does it connect to?
- Microsoft Word (CoCounsel for Word), Westlaw and Practical Law.
- Who uses it?
- One million professionals in 107 countries use CoCounsel across legal, tax and audit. Thomson Reuters says 80% of the Am Law 100 and 20,000 law firms and legal departments use it.
- How big is the company?
- Part of Thomson Reuters, a public company (Nasdaq and TSX: TRI).
Sources
- ↗ www.prnewswire.com/news-releases/thomson-reuters-launches-next-generation-of-cocounsel-legal-the-ai-ecosystem-built-for-legal-professionals-302855801.html
- ↗ cases.ai/cocounsel-legal
- ↗ sales.legalsolutions.thomsonreuters.com/en-us/products/cocounsel-legal/700/plans-pricing
- ↗ blogs.thomsonreuters.com/legal-blog/legal-ai-tools-essential-for-attorneys/
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Common questions
What is Thomson Reuters CoCounsel?
CoCounsel is Thomson Reuters' legal AI. It answers legal research questions from Westlaw, drafts in Word and reviews documents, and shows the sources behind each answer.
Who is Thomson Reuters CoCounsel for?
Firms and legal departments that already use Westlaw or Practical Law and want the AI on the same content.
How much does Thomson Reuters CoCounsel cost?
For firms of up to 10 attorneys, one attorney with all states plus federal costs $784 a month on a one-year term, $637 on three years. Larger firms and existing customers get a quote. These figures are read from a third party's page and Thomson Reuters' sales page. Checked against the vendor's pages on Nov 11, 2026. Plans change often, so confirm before you decide.
Does Thomson Reuters CoCounsel run locally or in the cloud?
Thomson Reuters CoCounsel runs in the vendor's cloud. You use it through chat apps and an API.
What are alternatives to Thomson Reuters CoCounsel?
Others on the Legal shortlist: Harvey.