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AI for Lawyers

CoCounsel — AI for Legal

The AI legal assistant to slash research and doc review time, trusted by numerous law firms and powered by Casetext.

Securely automate core legal tasks like contract analysis, deposition prep, and legal research with an AI built for lawyers.

What is CoCounsel?

CoCounsel: The AI legal assistant to slash research and doc review time, trusted by numerous law firms and powered by Casetext. No free plan. Zekai's independent review scores it 9 out of 10. Best for firms needing a secure, task-specific AI for research and doc review.

Facts checked 16 Oct 2026. Compare CoCounsel with alternatives →

Best forAI for Lawyers
DifferentiatorBacked by Casetext with a guarantee not to train on client data.
Explore CoCounsel
9 Zekai
A secure, lawyer-built AI
AI for Legal
Ease of Use
9.2
Accuracy
9.0
Value
8.6
Time Saving
9.0
Legal ResearchContract AnalysisDeposition PrepSecure (SOC 2)GPT-4 Powered
📊 Independently reviewed and scored. How we score →
✍️ Reviewed by Zekai Editorial Team · Updated August 6, 2026
🏷 Is this your tool? Claim this listing →

Zekai Verdict

What is it?
CoCounsel is an AI legal assistant designed specifically for lawyers to accelerate routine tasks and enhance work quality.
Best for
This tool is best for legal professionals who need to rapidly search databases, review documents, analyze contracts…
Not ideal for
Pricing is not transparent and requires scheduling a sales demo.
Price
Pricing on request
Zekai Score
9/10
Visit official site ↗Compare alternatives →Why this score →
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Hand-scored by Zekai

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⚡ Quick answer

For legal professionals, CoCounsel is the best AI for research and contract analysis. Backed by legal tech leader Casetext and trusted by numerous law firms, it offers specialized skills from deposition prep to contract review. Its use of a fine-tuned GPT-4 model, combined with a SOC 2 Type 2 security posture that guarantees your data isn't used for training, makes it a reliable, professional-grade tool.

CategoryLegal Research & Contract Analysis
Best forFirms needing a secure, task-specific AI for research and doc review.
Free planNo
DifferentiatorBacked by Casetext with a guarantee not to train on client data.
Rating9/10
📖 About CoCounsel
How It Works

Your workflow, automated

1
Select a Skill
Choose one of CoCounsel's eight core legal skills, such as 'Review Documents' or 'Research a Legal Issue'.
2
Upload Your Documents
Securely upload relevant case files, contracts, or discovery documents from your computer or cloud storage.
3
Ask Your Question
Instruct the AI in plain English to perform the task, such as 'Summarize this deposition' or 'Does this contract contain a change of control clause?'.
Ready to automate your workflow with CoCounsel?
Explore CoCounsel →
Real Impact

Before & After

❌ Before

Manually reviewing hundreds of pages of documents and contracts, taking days.

✅ After

Instantly identifying key clauses and facts in minutes, with AI-verified summaries.

Prompt Templates

Try it with these prompts

Copy any prompt and paste it directly into the tool.

Summarize Document

Please summarize the key findings and action items from the attached legal document. Focus on the main arguments and any deadlines mentioned.

Draft Contract Clause

Draft a standard non-disclosure clause for a software development agreement. Ensure it clearly defines confidential information and the obligations of both parties.

Analyze Legal Precedent

Analyze the provided case law regarding intellectual property disputes. Identify the core legal principles established and how they might apply to a new case.

AI Prompts

Prompts for Lawyers

Prompt 01 Build an Initial Review Checklist
Act as a senior associate at an Am Law 100 firm reviewing a new Master Services Agreement (MSA) from a vendor. Your client is a US-based B2B SaaS company. The governing law is Delaware.
Prompt 02 Draft a Clause from a List of Business Terms
Act as a transactional attorney. Draft a "Limitation of Liability" clause for a software-as-a-service agreement. Context: • Governing Law: New York • My Client: The SaaS provider • Key Business Terms: • Exclude liability for indirect…
Prompt 03 Compare Two Versions of a Clause
I have two versions of an Indemnification clause. Version A is my company's preferred language. Version B is a counterparty's proposed redline. Analyze both versions and create a summary table that compares them.
See all 34 AI prompts for Lawyers →
Social Proof

Trusted by professionals

Ease of Use
9.2
Accuracy
9.0
Value
8.6
Time Saving
9.0
See Plans & Pricing →
Comparison

Best CoCounsel alternatives

CoCounsel vs. Lexis+ AI: CoCounsel, from Casetext, excels with its focused set of eight core legal skills, acting as a dedicated AI assistant. It's ideal for firms wanting a powerful, task-specific tool with top-tier security guarantees. Lexis+ AI is deeply integrated into the LexisNexis ecosystem, making it a seamless choice for firms already invested in that platform for research. Choose CoCounsel for its specialized-skill approach and clear security posture; choose Lexis+ AI for its deep integration with an existing, comprehensive legal database.

You are already deeply integrated with the LexisNexis ecosystem.
You need a tool with transparent, publicly listed pricing tiers.
You primarily require a generative AI for non-confidential, general writing tasks.
The decision

Is CoCounsel worth it?

Return on investment
By automating document review that takes 20 hours/month, a firm can save thousands in billable time, justifying the custom subscription price within a few cases.
Built for
Attorneys, paralegals, and legal teams in firms of all sizes, from solo practitioners to Am Law 100, seeking to improve efficiency and work quality.
Effort to adopt
Moderate
Compliance
CoCounsel is SOC 2 Type 2 certified. The vendor explicitly states they do not train AI models on customer data, and all data is encrypted at rest and in transit.
Who It's For

Why Legal choose this tool

🎯
Built for
This tool is best for legal professionals who need to rapidly search databases, review documents, analyze contracts, and prepare for depositions with AI assistance they can trust.
In-Depth Overview
For legal professionals, CoCounsel's credibility stems from its foundation: it's a Casetext product, a company with deep roots in legal technology, now part of Thomson Reuters. This isn't a generic AI wrapper; it's a purpose-built suite of eight core legal skills, from drafting correspondence to analyzing contracts. The platform's use of a fine-tuned GPT-4 model provides sophisticated reasoning capabilities, while its explicit security promise—SOC 2 Type 2 certification and a guarantee not to train on client data—directly addresses the legal industry's primary concern with AI adoption. The trust placed by law firms provides social proof of its reliability and effectiveness in real-world practice. It solves the problem of applying AI to legal work safely and effectively, moving beyond theoretical benefits to deliver a practical tool for daily legal tasks.

Key Use Cases

📈
Accelerate Contract Review Cycles
Corporate Counsel
Instantly analyze contracts against a checklist, extract key clauses, and identify non-standard terms without hours of manual reading.
Contract review time cut by a significant margin
⚖️
Dominate Deposition Preparation
Litigation Associate
Upload witness testimony and case files to rapidly identify key facts, timeline inconsistencies, and critical areas for questioning.
Prep time reduced from days to hours
✍️
Automate First-Draft Research Memos
Paralegal
Ask complex legal questions in natural language and receive a detailed draft memo with supporting sources from its database.
First draft generated in minutes
· Cons
Pricing is not transparent and requires scheduling a sales demo.
Effectiveness for highly novel or niche legal issues may vary.
Requires uploading sensitive case files, which can be a procedural hurdle for some firms.
Primarily focused on US law; applicability in other jurisdictions needs verification.
⚡ Editorial Verdict

CoCounsel is a powerful, highly credible AI assistant for legal work, thanks to its Casetext pedigree and robust security features. Its strength lies in its focused, task-oriented skills, but the lack of public pricing means smaller firms will need to engage with sales to determine if the ROI is justified.

See all 538 AI tools for Lawyers → Browse the AI Directory →
Questions & Answers

Frequently asked questions

Is CoCounsel available for use in Canada, the UK, or Australia?

+
The website does not specify geographic limitations, but its parent company, Casetext, has historically been US-focused. You should verify jurisdiction-specific capabilities and data sources during your product demo.

Is CoCounsel suitable for solo practitioners or small law firms?

+
Yes, CoCounsel states it is trusted by firms of all sizes, from solo practitioners to large Am Law 100 firms. The value and pricing for your specific practice size should be discussed during the mandatory sales demo.

Is my confidential client data safe with CoCounsel?

+
CoCounsel emphasizes security as a core feature. It is SOC 2 Type 2 certified, encrypts your data both at rest and in transit, and most importantly, guarantees that your confidential information is never used to train their AI models.

What AI model does CoCounsel use?

+
CoCounsel is powered by an advanced and fine-tuned version of OpenAI's GPT-4 model, which has been specifically adapted for complex legal reasoning and tasks.

How does CoCounsel avoid the 'hallucinations' or fake cases seen in other AI?

+
As a product from legal research company Casetext, CoCounsel is engineered to ground its responses in reliable data. It is designed to provide answers with direct links to supporting sources, ensuring that its output is verifiable and trustworthy for legal work.

What is the difference between CoCounsel and a general tool like ChatGPT?

+
Unlike a general-purpose AI, CoCounsel is a professional-grade tool built specifically for legal work. It offers specialized legal skills, a secure and confidential environment (SOC 2 certified), and a guarantee not to train on your data, making it suitable for handling sensitive client information.

Last reviewed:

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Free guide

Take it with you

Getting Started with CoCounsel: A 5-Minute Guide
  • Understanding the 8 Core Skills: Learn the difference between Research, Document Review, and Deposition Prep.
  • Securely Uploading Your First File: Best practices for uploading documents from your computer or cloud drive.
  • The Art of the Prompt: How to ask questions to get the best results.
  • Reviewing & Verifying AI Output: Checking sources and refining answers.
  • Use Case Spotlight: Contract Analysis: Find a key clause in seconds.
+4 more steps inside the guide
Send me the full guide

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About CoCounsel

Full Description

CoCounsel is an AI legal assistant designed specifically for lawyers to accelerate routine tasks and enhance work quality. It leverages a fine-tuned GPT-4 model to perform document review, legal research, contract analysis, and deposition preparation, all within a secure, confidential environment that doesn't train on your data.

Editorial Verdict

CoCounsel is a powerful, highly credible AI assistant for legal work, thanks to its Casetext pedigree and robust security features. Its strength lies in its focused, task-oriented skills, but the lack of public pricing means smaller firms will need to engage with sales to determine if the ROI is justified.

Last reviewed:
Disclaimer
Zekai is an independent AI tools directory. We are not affiliated with, endorsed by, or officially connected to CoCounsel unless clearly stated. All product names, logos, and brands are the property of their respective owners and are used for identification purposes only. The information on this page — including pricing, features, and availability — is general information, may have changed since our last review, and is not professional advice. Zekai Scores and verdicts are our editorial opinion. Some outbound links are affiliate links that may earn us a commission at no extra cost to you. Spotted outdated or incorrect information? Request a correction →
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