How to Use AI for Legal Writing: A Practical Guide for Lawyers
The legal industry is changing quickly, and artificial intelligence is becoming a practical tool for legal professionals. For lawyers and legal teams, the value of AI is not just about keeping up with technology. It is about working more efficiently, improving consistency, and producing stronger work product.
One of the most useful applications is legal writing. AI tools can help with drafting pleadings, contracts, memos, summaries, and research-based content. Used well, they can save time on repetitive tasks and support better, faster decision-making. This guide explains how to use AI for legal writing, what it can do well, where it falls short, and how to choose the right tool for your practice.
Why AI for Legal Writing Matters
Legal writing takes time. Drafting, revising, reviewing, and researching can absorb hours that could otherwise go toward client work, strategy, or business development. AI can help reduce that burden by handling routine work and supporting the drafting process.
Key benefits include:
- Faster drafting: AI can create first drafts, outlines, summaries, and standard language much more quickly than manual drafting.
- Better consistency: It can help identify missing language, formatting issues, and inconsistencies across documents.
- Improved clarity: AI can suggest cleaner phrasing, stronger sentence structure, and a more professional tone.
- Faster research support: It can help sort through large volumes of legal material and summarize relevant authorities.
- Lower costs: Time savings can translate into more efficient billing and better client value.
- Reduced risk: A second layer of review can help catch errors before they become problems.
For solo practitioners, small firms, and in-house teams alike, the right AI workflow can improve both productivity and output quality.
Best AI Tools for Legal Writing
Different tools are better suited to different tasks. Some are designed for legal research and drafting, while others focus on document review, contract analysis, or general writing support.
1. Lexis+ AI
Lexis+ AI integrates generative AI into the LexisNexis research platform. It can summarize legal documents, help draft pleadings and motions, answer legal questions based on research, and support contract analysis and due diligence.
Why it is useful:
It is tied to a major legal research database, so the output is grounded in authoritative legal sources. It is built for legal professionals and fits naturally into research-heavy workflows.
Best for:
Attorneys who already use LexisNexis and want AI support for drafting and research in one place.
Pros:
- Deep integration with a leading legal research platform
- Useful for first drafts and case summaries
- Provides citations and source links
- Supports existing research workflows
Cons:
- Requires a LexisNexis subscription
- May take some time to learn
2. Casetext CoCounsel
CoCounsel is an AI legal assistant designed to support a wide range of legal tasks, including research memos, deposition preparation, contract analysis, document summarization, and due diligence review.
Why it is useful:
It is built for legal work and can handle document-heavy tasks efficiently. It is especially useful when you need help breaking down complex material or drafting structured legal content.
Best for:
Firms of different sizes that need a versatile AI assistant for research and drafting tasks.
Pros:
- Broad support across legal workflows
- Strong for memo drafting and document review
- Designed for secure legal use
- Aims to provide cite-checked outputs
Cons:
- Still evolving as a newer platform
- Pricing may be challenging for smaller firms
3. ChatGPT
ChatGPT is not a legal-specific tool, but it can still be helpful for drafting outlines, rephrasing text, summarizing non-confidential material, and brainstorming arguments or clause ideas.
Why it is useful:
It is flexible and easy to access, which makes it a useful starting point for many writing tasks. It works best as a drafting assistant, not as a source of legal authority.
Best for:
Solo practitioners, small firms, or teams looking for a general-purpose writing aid.
Pros:
- Accessible and relatively affordable
- Useful for brainstorming and drafting support
- Can help improve tone and clarity
- Works across many types of text tasks
Cons:
- Not trained on up-to-date legal databases
- Does not reliably understand jurisdiction-specific rules
- Must be carefully reviewed for accuracy
- Do not enter confidential client information
4. Harvey AI
Harvey AI is designed specifically for legal professionals and focuses on legal reasoning, drafting, research, contract analysis, and litigation support.
Why it is useful:
It is built with legal context in mind and is intended to help lawyers work through more complex issues with greater precision.
Best for:
Larger firms or legal departments that need advanced drafting and reasoning support.
Pros:
- Strong legal reasoning capabilities
- Designed for professional legal workflows
- Focuses on confidentiality
- Useful for complex legal analysis
Cons:
- Often geared toward larger organizations
- Pricing is typically bespoke and can be substantial
5. Kira Systems
Kira Systems, now part of Litera, is best known for contract review and analysis. It helps extract information from contracts and legal documents that can then be used to support drafting, due diligence, and summaries.
Why it is useful:
By identifying key clauses, obligations, and risks in existing documents, it helps lawyers draft with more context and consistency.
Best for:
Transactional lawyers, corporate legal teams, and due diligence work involving large document sets.
Pros:
- Strong contract data extraction
- Speeds up review and due diligence
- Supports consistent document analysis
- Integrates with other legal technology tools
Cons:
- More focused on analysis than original drafting
- Works best when trained on relevant document types
6. DocuSign Analyzer
DocuSign Analyzer uses AI to review contracts before they are sent or signed. It can flag key clauses, highlight deviations from standard terms, and provide risk scoring.
Why it is useful:
It supports both review and drafting by showing where a contract may need changes or closer attention.
Best for:
Contract drafting and review in firms and legal departments that handle frequent agreements.
Pros:
- Integrates with the DocuSign platform
- Helps identify contract risks
- Supports faster review cycles
- Useful for compliance-focused workflows
Cons:
- More focused on contract analysis than broad document generation
How to Use AI for Legal Writing Effectively
AI works best when it is used as part of a controlled workflow. The goal is to speed up drafting and improve quality, not to replace legal judgment.
A practical approach looks like this:
1. Start with a clear task
Before using AI, define exactly what you need. For example:
- A first draft of a motion
- A summary of a case
- A contract clause comparison
- A research memo outline
- A rewrite for clarity and tone
The clearer your instruction, the more useful the output will be.
2. Use AI for structure first
AI is often strongest when generating outlines, section headings, and rough first drafts. That gives you a framework you can refine with legal analysis and jurisdiction-specific language.
3. Review and verify everything
AI-generated legal content should never be used without human review. Check:
- Accuracy of facts and citations
- Jurisdiction-specific rules
- Consistency with the matter at hand
- Definitions, dates, and references
- Tone and completeness
4. Keep client confidentiality in mind
Never assume a tool is safe for sensitive information. Review privacy policies, security practices, and data retention terms before using any AI platform with client-related material.
5. Use AI to support, not replace, legal judgment
AI can help draft and organize, but lawyers remain responsible for strategy, advice, and final work product. The best results come when AI is used as an assistant, not an author.
How to Choose the Right AI Tool
The right tool depends on your practice area, workflow, and risk tolerance.
Consider the following:
- Primary use case: Are you focused on drafting, research, contract review, or document summarization?
- Budget: Legal AI tools can range from affordable to enterprise-level pricing.
- Workflow fit: Will the tool integrate with your current systems and process?
- Security and confidentiality: How does the provider handle client data?
- Ease of use: Will your team actually adopt it?
- Verification: Does the tool provide citations, source links, or other ways to check its output?
For broad legal research and drafting, Lexis+ AI and CoCounsel are strong options. For contract-heavy work, Kira Systems or DocuSign Analyzer may be a better fit. For general drafting support, ChatGPT can be useful if used carefully.
Pricing and Value
AI pricing varies widely, and the cheapest option is not always the best value.
Common pricing models include:
- Subscription plans: Monthly or annual pricing with tiered access
- Usage-based pricing: Pay according to volume or feature access
- Enterprise solutions: Customized pricing for larger firms or legal departments
When evaluating value, look beyond the subscription cost. Consider how much time the tool might save, whether it reduces drafting errors, and whether it helps your team handle more work without sacrificing quality.
Frequently Asked Questions
Can AI replace lawyers in legal writing?
No. AI can assist with drafting and research, but legal judgment, strategy, and professional responsibility still belong to the lawyer.
Is it safe to input confidential client information into AI tools?
Not by default. Avoid entering sensitive information into public or general-purpose AI tools. For legal-specific platforms, review security and privacy policies carefully before use.
How accurate are AI-generated legal documents?
Accuracy depends on the tool and the quality of the input. Legal-specific tools are often stronger than general-purpose tools, but every output should still be reviewed by a qualified legal professional.
What ethical issues should lawyers consider?
Key issues include confidentiality, competence, accuracy, bias, and responsibility for the final work product. Lawyers should also stay current on guidance from their bar association.
Do I need to disclose that I used AI for legal writing?
That depends on the situation and the guidance in your jurisdiction. In many cases, AI is treated as a drafting aid, but it is important to stay informed about local ethical rules and client expectations.
Conclusion
AI is already changing how legal writing is done. Used thoughtfully, it can help lawyers draft faster, research more efficiently, improve consistency, and reduce repetitive work.
The key is to choose the right tool for the job, protect client confidentiality, and review every output carefully. When AI is integrated into a legal workflow with proper oversight, it can become a practical advantage for firms of all sizes.