Submit a tool
Paid

CoCounsel

Reached 1 million users in 3 years, backed by Thomson Reuters after a $650M acquisition

4.3 Legal AI
4.3 Very good 4.3
Thomson Reuters backing brings deep legal-content integration most competitors lack Practical Law integration requires the higher-priced tier to access fully
Reviewed by Challenging Voice Editorial · Updated Jul 2026 How we rate
PricingFrom $375/mo
Free planNo
CompanyThomson Reuters
PlatformsAPI, Web
CategoryLegal AI
Founded2023
Last reviewedJul 2026
Ask AI about CoCounsel ChatGPT Claude Perplexity

Overview

CoCounsel launched March 1, 2023 as the first AI legal assistant built on GPT-4, developed by Casetext before Thomson Reuters acquired the company for $650 million in cash a mere four months after release, folding it into Thomson Reuters' existing legal research and Practical Law products rather than operating it as a standalone startup.

That backing gives CoCounsel a multi-model AI architecture, drawing on frontier models from Anthropic, OpenAI, and Google alongside Thomson Reuters' own proprietary legal-AI technology, and the platform reached 1 million users across 107 countries and territories by 2026, a scale few standalone legal-AI startups have matched.

CoCounsel Core starts at $4,500 a user annually, with a Practical Law-integrated tier moving to $6,600 a user annually for access to Practical Law's practice guides and templates. For a legal team that wants an AI assistant backed by Thomson Reuters' existing legal-content ecosystem, with access to Practical Law's guides built in, rather than a standalone AI-only platform, CoCounsel's publisher-backed integration addresses that directly.

Key features

  • First AI legal assistant built on GPT-4, launched March 2023
  • Backed by Thomson Reuters after a $650M acquisition of Casetext
  • Multi-model architecture spanning Anthropic, OpenAI, and Google models
  • 1 million users across 107 countries and territories by 2026
  • Optional integration with Thomson Reuters' Practical Law guides and templates
  • Published, transparent per-user annual pricing

Screenshots & demo

Demo video

Screenshots

CoCounsel screenshot 1

Pricing

CoCounsel is a paid tool, with plans that start at $375/mo.

  • Pricing modelPaid
  • Starting priceFrom $375/mo
  • Free planNo
Visit CoCounsel

Pricing is provided as a guide. Check the official site for the latest plans.

Is CoCounsel expensive?

CoCounsel starts at $375, which is 279% above the Legal AI median of $99 a month across the 19 priced tools we list in that category.

The cheapest paid option in Legal AI starts at $5 and the most expensive at $550.

12% of Legal AI tools in the directory offer a free tier, which this one does not.

Compared against every priced listing in Legal AI, recalculated as the catalogue changes. Method and the full market breakdown are in our AI tool pricing study.

Pros & cons

Pros

  • Thomson Reuters backing brings deep legal-content integration most competitors lack
  • Massive user scale, 1 million users, validates broad real-world adoption
  • Multi-model architecture avoids dependence on one AI provider
  • Transparent published pricing, unlike most enterprise legal-AI competitors

Cons

  • Practical Law integration requires the higher-priced tier to access fully
  • Backed by a legacy legal publisher rather than operating as an independent AI-first startup
  • Entry pricing at $4,500 a year per user still represents a real budget commitment

How it compares

ToolRatingFreeFromBest known for
CoCounsel (this tool)4.3No$375/moFirst AI legal assistant built on GPT-4, launched March 2023
Harvey4.4No$333/moDocument review, due diligence, contract analysis, and legal research in one platform
Luminance4.2No—Proprietary LLMX model trained specifically on legal documents
Clio4.3No$49/moManage AI converts practice tasks into completed actions, not just suggestions

Alternatives to CoCounsel

4 tools matched to CoCounsel on what they do, their category and their price.

Clio

4.3

The largest M&A deal in legal tech history just made its AI reach every corner of the practice

Paid Legal AI
View details Visit

Frequently asked questions

What is CoCounsel?
CoCounsel is a legal ai tool. Reached 1 million users in 3 years, backed by Thomson Reuters after a $650M acquisition.
Is CoCounsel free?
CoCounsel does not offer a free plan; paid pricing starts at $375 per month.
How much does CoCounsel cost?
CoCounsel starts at $375 per month. See the pricing plans above for full details.
What are the best CoCounsel alternatives?
The closest matches in the directory are Harvey, Luminance, and Clio, compared side by side above.

Reviews

4.3 Editorial rating No reviews yet

Write a review

More tools like CoCounsel

AI Lawyer

3.8

AI Lawyer answers legal questions, drafts documents, and summarizes contracts through a chat assistant on web, iOS, and Android.

Freemium Legal AI
View details Visit

Ayora

3.8

AI platform that helps law firms track matter budgets and stop revenue leakage before invoices go out.

Contact for Pricing Legal AI
View details Visit

Neota Logic

4.0

Governed AI platform for legal teams that wraps OpenAI, Anthropic Claude and Google Gemini in deterministic workflows with human oversight and audit trails, built with a no-code Logic Engine.

Contact for Pricing Legal AI
View details Visit