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CoCounsel: Thomson Reuters' AI associate, priced by quote

Our verdict: CoCounsel is the closest thing legal AI has to a household name: the former Casetext product, rebuilt under Thomson Reuters, that drafts research memos, preps depositions, reviews document sets, and analyzes contracts with the Westlaw ecosystem behind it. The capability is real; the pricing is opaque. Thomson Reuters publishes no clean CoCounsel rate card — third-party reports put Core around $225/user/mo, Westlaw Precision bundles near $428, and an All Access tier around $500. The value case is strongest for firms already paying for Westlaw; a solo starting from zero should price Paxton's published $499/mo and Westlaw's own $155.35/mo AI-research tier against whatever quote comes back.

The short version:

What it is: Thomson Reuters' generative-AI legal assistant (born as Casetext CoCounsel), covering research, deposition preparation, document review, timeline building, and contract analysis.
What it costs: by quote. Third-party aggregators report roughly $225/user/mo for Core (document skills without case-law access), ~$428 for Westlaw Precision with CoCounsel, and ~$500 for All Access. None is a published Thomson Reuters number.
The ecosystem catch: the research skills draw their strength from Westlaw — firms not already in that ecosystem pay for entry one way or another.
The comparisons to run: Paxton publishes $499/mo self-serve; Westlaw AI-Assisted Research is TR's one public number at $155.35/mo (3-yr term, ≤10 attorneys). Our CoCounsel vs Paxton page runs it.

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See it explained

Any pricing shown in this video was current when it was recorded — check the vendor’s site for today’s price.

CoCounsel is Thomson Reuters' AI legal assistant for research, deposition prep, and document review; pricing is quote-only, with third-party reports from roughly $225 to $500 per user per month depending on bundle.

What does CoCounsel actually deliver?

Its skills read like an associate's task list: turn a research question into a memo with authorities; prepare deposition outlines from the pleadings; review a document production for responsive or privileged material; extract obligations from a contract stack; build a timeline from the record. Each output arrives as a draft with sources attached — fast, competent, and unsigned until a lawyer verifies it.

Two things separate it from cheaper research AI. First, the Westlaw connection: research skills grounded in the same database your citations must survive in. Second, breadth — one subscription spans litigation and transactional tasks that would otherwise take two or three point tools. Whether that breadth justifies the reported price depends entirely on how many of the skills your practice will actually use.

What does it cost, as best anyone can tell?

Thomson Reuters does not publish CoCounsel pricing on a clean public page. The consistent third-party picture for 2026: an on-demand per-task option around $50–$75, CoCounsel Core near $225/user/mo, Westlaw Precision with CoCounsel around $428, and an All Access tier near $500/user/mo marketed as unlimited. Firms report the real number moves with seat count, term, and what Westlaw products are already on the account.

Treat all of it as reported, not confirmed. Ask the quote to itemize the CoCounsel line separately from Westlaw, get term length and renewal terms in writing, and benchmark against Paxton's public $499 and Westlaw AI-AR's public $155.35 before signing. Pricing basis: third-party reported; no vendor rate card. Checked 2026-07-18.

What about confidentiality?

Confidentiality note: contracts, matter facts, and client communications are protected by Model Rule 1.6 and your state's version of it. Before this tool touches any of that, get the vendor's data-handling and model-training terms in writing and check your state bar's AI guidance — ABA Formal Opinion 512 folds that diligence into the duty of competence. Our ethics and confidentiality guide covers the questions to ask. Nothing on this page is legal or ethics advice.

Who is it the right call for?

Strong if…

Your firm already subscribes to Westlaw — the marginal cost of adding CoCounsel is the number to negotiate.
You will use the breadth: research plus deposition prep plus document review in one place.
Litigation document volume is high enough that review skills alone justify a seat.
You have the leverage and patience to negotiate a quote-only enterprise deal.

Maybe not if…

You are a solo starting from zero — price Paxton ($499 published) and Westlaw AI-AR ($155.35 published) first and make the quote beat them.
You only need contract review — a dedicated Word tool costs a fraction of the reported figures.
Quote-only pricing with ecosystem lock-in is a dealbreaker on principle.
Your practice rarely generates the document volume the review skills are built for.

Common questions

How much does CoCounsel cost per month?

Thomson Reuters does not publish CoCounsel pricing. Third-party reports for 2026 cluster around $225 per user per month for Core, roughly $428 for Westlaw Precision with CoCounsel, and about $500 for All Access, with an on-demand per-task option reported around $50-$75. Get an itemized written quote — the real number varies with seats, term, and existing Westlaw products.

Do I need Westlaw to use CoCounsel?

No, but the research skills are strongest inside the Westlaw ecosystem, and the standalone Core tier reportedly lacks case-law access. Firms without Westlaw should compare what a combined quote costs against self-serve alternatives before committing.

Is CoCounsel the same as Casetext?

CoCounsel began as Casetext's product; Thomson Reuters acquired Casetext in 2023 and folded the product into its ecosystem. Lawyers with old Casetext workflows found pricing and product structure changed in the transition.

Is CoCounsel worth it for a small firm?

It depends on breadth of use. A firm that will genuinely use research, deposition prep, and document review in one seat can justify a reported ~$225-$500/user/mo; a firm that needs one of those jobs can usually buy it for much less elsewhere.

Last reviewed: 2026-07-19. Nothing on this page is legal advice, an ethics opinion, or a recommendation to hire any provider.

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