Operating guides / Vendor evaluation

How to evaluate a legal AI tool

Start with the work, not the product category. Record the current process and decide the failure condition before viewing the result.

by Hamza Suleman. Published . Operational guidance, not legal advice or a product recommendation.

Direct answer

What is the safest way to evaluate a legal AI tool?

Freeze one task, use representative inputs, retain source evidence, count qualified review time and compare the result with conditions agreed before the test.

1. What should be defined before evaluating a legal AI tool?

Name the trigger, finish line, volume, roles and review standard. Do not let the supplier expand the scope after the baseline is recorded.

2. Use representative inputs

Use a sequential, approved sample. Avoid memorable matters chosen because the answer is already known. Where live client material is unnecessary, use made-up or properly redacted examples.

3. Test retrieval and evidence

For every material output, ask which source supports it and how a reviewer reaches that source. A fluent answer with no source route is not a completed legal workflow.

4. Why should supervision count in the evaluation?

Measure reviewer time, corrections and escalation. A faster first output can still cost more once qualified checking is included.

5. Get the operating answers in writing

Record data location, subprocessors, retention, training use, deletion, support, change control and exit. Marketing copy is not the operating contract.

6. Decide from the agreed conditions

Compare the result with the pass and fail conditions set before the test. Then fix the process, buy a tool, run a further controlled pilot or leave it alone.

For the wider context, read our legal AI workflow answers. Explore Margo by Margo Legal, currently in development, or use the Workflow Value Workshop to examine one repeated workflow.

Before the demo

Measure the workflow the tool is supposed to improve.

The score checks whether one repeated workflow has enough evidence, responsibility and recurrence to support an honest evaluation.

Score one workflowOpen the Decision Guide

Put the answer to work

Write non-negotiable requirements from one workflow and its owners. Collect supplier evidence against a frozen requirement, test set and exit route. Record the context, permission and source checks rather than relying on fluent output. A demonstration is not evidence that the firm can operate the product safely.

These optional PDF worksheets are available without an email address, booking or client data. They are operational aids, not legal advice.

Browse source-bound legal-tool profiles, or browse all 63 ungated guides.