Best AI Tools for Lawyers: Research, Drafting and Contract Review

Legal work is mostly reading and writing, which is exactly what modern AI is good at. The best tools now cut hours from first drafts, contract review, research memos and client updates. But law also has stricter rules than most professions: confidentiality, privilege, and a duty to check every authority you cite. This guide covers the tools lawyers actually use, what each is for, and how to adopt them safely.

Legal AI platforms

These are built for law firms and legal teams, with security, matter workspaces and legal-specific workflows. They’re sold to organisations, usually after a demo, rather than as a self-serve subscription.

Harvey is a generative AI platform for law firms and in-house teams, used for research, drafting, due-diligence review and document analysis. Legora focuses on collaborative AI for legal work, letting teams run reviews across many documents and draft together.

Contract drafting and review

Spellbook works inside Microsoft Word: it suggests clauses, flags risky or missing terms and helps you redline against your position. Luminance reads large volumes of contracts to find unusual clauses and answer questions across a data room. Ironclad is contract lifecycle management: requests, approvals, signatures and a searchable repository, with AI to extract key terms.

General assistants for everyday legal work

For summaries, first drafts, client emails, plain-English explanations and brainstorming arguments, a general assistant on a business plan is often enough, and much cheaper than a dedicated platform.

[compare claude chatgpt]

Paste the source material (the judgment, the clause, your notes) rather than asking from memory. Grounded answers are far more reliable.

How to use AI safely in legal practice

1. Protect confidentiality. Use business or enterprise plans that don’t train on your data, and follow your firm’s policy. Never paste client secrets into a personal free account.
2. Verify every authority. AI tools can invent cases and citations that look real. Check each one in a trusted legal database before it goes near a filing.
3. Keep a human in the loop. Treat output as a junior associate’s first draft: useful, fast, and always reviewed.
4. Know your rules. Bar associations and courts increasingly publish guidance on AI use and disclosure. Check what applies where you practise.
5. Record what you used. Keep a note of the tool and the prompt for work product, in case you need to explain how a draft was made.

Prompts that work for lawyers

• “Summarise this judgment in 200 words: the facts, the question, the holding and why it matters for a client in [industry].”
• “Compare these two contract versions and list every change to obligations, liability and termination in a table.”
• “Explain this clause to a non-lawyer founder in plain English, with one example of how it could go wrong.”

We’re putting together a full set of tested prompts for legal work. See the prompt packs.

Frequently asked questions

Can AI replace lawyers?

No. It replaces some of the slowest parts of the work (first drafts, first-pass review, summaries) and makes good lawyers faster. Judgment, advice and accountability stay with you.

Is it safe to upload client documents?

Only to tools your firm has approved, on plans with clear data-protection terms. Read the provider’s data-retention and training policies, and check where data is stored.

What’s the cheapest way to start?

A business plan of a general assistant such as Claude or ChatGPT, used for summaries and drafts with careful review. Move to a legal platform when volume or security needs justify it.