Claude for Law Firms: A Practical Guide for UK Solicitors

Claude is an AI assistant made by Anthropic. For law firms, it is one of the strongest tools for reading, summarising and drafting long documents. Used on a business plan with clear rules, it can save fee earners hours every week without putting client data at risk.

Many firms have heard of ChatGPT and Copilot but have not tried Claude. This guide explains what Claude is good at, which plan a law firm needs, how to use it safely, and how to get started.

What Claude does well for lawyers

• Long documents. Claude can work through long contracts, leases, bundles and reports in one go, then answer questions about them.
• Careful writing. It produces clear, measured drafts that suit client letters, attendance notes and internal memos.
• Summaries and comparisons. Ask it to compare two versions of a contract or pull the key dates and obligations from a lease.
• Projects. Teams can keep precedents, style guides and instructions in one shared space, so answers follow the firm's way of working. Claude does not replace legal judgement. It speeds up the first draft and the first read, so your lawyers spend more time on the thinking.

Practical tasks to start with

These are good first uses because they save real time and the output is easy to check:

• Lease and contract summaries. Key terms, dates, break clauses, rent reviews and obligations in a short table.
• First drafts of client letters. Give Claude the facts and your firm's style guide, then edit the result.
• Attendance notes. Turn rough notes into a clean, structured note for the file.
• Comparing documents. Spot what changed between two drafts and flag anything unusual.
• Internal know how. Turn a long guidance note into a one page summary for the team. Avoid starting with legal research or court submissions. AI tools can invent cases and citations, and every authority must be checked against the original source.

Which Claude plan does a law firm need?

Anthropic offers personal plans and business plans, and the difference matters.

• Free, Pro and Max. Personal plans for individuals. Whether chats are used for training depends on a setting each user controls, and there is no contract between the firm and Anthropic. Not suitable for client data, even if someone pays for Pro.
• Team. The business plan for groups of 2 to 150 users. Anthropic does not train on Team content by default, and it includes central billing, admin controls, shared projects and single sign on. It costs from around $20 per seat per month on annual billing.
• Enterprise. For larger firms. Adds features such as audit logs, user provisioning and configurable data retention. It has higher minimum seat numbers and custom pricing. For most small and mid size firms, Team is the realistic starting point. Prices and features change often, so check the current terms before you sign up.

Using Claude safely

Choosing the right plan is the first step. A safe setup also includes:

• A data processing agreement with Anthropic, reviewed by whoever handles data protection in the firm. Our guide to what happens to client data in AI tools explains why this matters.
• Single sign on, so access ends when someone leaves.
• Clear rules on what goes in. Many firms start with anonymised material only, then widen the rules once the setup has been reviewed.
• Connectors switched on with care. Claude can connect to email, drives and other apps. Only turn on what you need.
• A data protection impact assessment before using it for personal data.
• A short AI policy so staff know what is allowed and how outputs are checked. Our guide to AI policy for law firms covers what to include. The SRA's August 2026 warning notice makes clear that solicitors remain responsible for any work produced with AI, and that client information should only go into AI systems with proper safeguards in place. A business plan, a policy and trained staff go a long way to meeting that.

Claude, ChatGPT or Copilot?

There is no single right answer. Copilot sits inside Microsoft 365, which suits firms that live in Outlook and Word. ChatGPT is the best known and has a wide range of features. Claude often stands out for long documents and the quality of its writing.

Some firms use Copilot for everyday email and documents and Claude for heavier document work. Many start with one tool, learn what works, then decide.

Getting started

1. Pick a small group. Start with a few willing fee earners and one practice area.
2. Choose real tasks. Lease summaries, first draft letters and file reviews are good places to begin.
3. Set the rules. Agree what data can be used and how outputs are checked.
4. Set up a shared project. Add your style guide, a few precedents and standing instructions so everyone gets consistent results.
5. Train properly. People get far more from Claude when they learn how to give it good instructions. See our guide to AI training for solicitors.
6. Measure the time saved. Then decide whether to roll it out wider.