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CoCounsel

The AI legal assistant to slash research and doc review time, trusted by 10,000+ 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.

Best forFirms needing a secure, task-specific AI for research and doc review.
DifferentiatorBacked by Casetext with a guarantee not to train on client data.
ProofTrusted by 10,000+ law firms; SOC 2 Type 2 Certified.
Explore CoCounsel
Pricing on request
9.1 Zekai
A secure, lawyer-built AI
AI for Legal
Ease of Use
9.0
Accuracy
9.4
Value
8.4
Time Saving
9.6
10,000+Users
9.1/10Zekai Score
Legal ResearchContract AnalysisDeposition PrepSecure (SOC 2)GPT-4 Powered
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Hand-scored by Zekai

Top AI for Legal picks

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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 over 10,000 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.
Price FromOn request
FreeNo
DifferentiatorBacked by Casetext with a guarantee not to train on client data.
ProofTrusted by 10,000+ law firms; SOC 2 Type 2 Certified.
Rating4.6/5
📖 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.

5 days for discovery review
✅ After

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

1 day for discovery review
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.

Social Proof

Trusted by 10,000+

10,000+ professionals using this tool
Ease of Use
9.0
Accuracy
9.4
Value
8.4
Time Saving
9.6

"This has fundamentally changed our deposition prep. We can surface critical facts from thousands of pages in an afternoon. It's an incredible advantage."

Sarah K., Litigation Partner · Jun 2026

"The contract analysis tool is a lifesaver. We can now run a first-pass review on NDAs and vendor agreements in minutes, freeing up my team for higher-value work."

David R., Corporate Counsel · May 2026

"The power is undeniable, especially for legal research. However, the 'contact for pricing' model makes it hard to budget, and it's a significant investment for a small practice."

Maria G., Solo Practitioner · Jun 2026

"I can generate research memos and document summaries that are 90% of the way there. My supervising attorneys are thrilled with the speed and quality."

Ben L., Paralegal · Apr 2026
10,000+ professionals are already using this tool.
See Plans & Pricing →
Connects With

Works with your existing stack

iManage NetDocuments Clio Relativity Filevine Local document uploads
Setup complexity: Moderate
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.
Comparison

How it compares

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 it 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 claim that over 10,000 law firms trust CoCounsel 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 80%
⚖️
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
✓ Pros
Backed by Casetext, a trusted leader in legal technology.
Performs 8 core legal skills from research to drafting.
Explicitly guarantees it does not train AI on your confidential data.
SOC 2 Type 2 certified, ensuring high data security standards.
Powered by an advanced, fine-tuned version of GPT-4 for legal tasks.
· 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.

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:

Plans & Pricing

Start today

Prices and features are updated regularly but can change at any time — always confirm on the official website. Some links on this page are affiliate links.

See all 113 AI for Legal tools →
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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AI Directory

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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