The best AI contract review tool for most UK small businesses in 2026 is Genie AI. It is a UK company, it offers a free plan, and its Pro plan starts at $59 per month. For a few contracts a year, a free chatbot plus a pay-per-check UK service costs less.
What AI contract review tools actually do
An AI contract review tool reads an uploaded agreement and does the slow first pass for you. It flags risky clauses, explains them in plain English, suggests redline edits and summarises parties, dates, values, renewal terms and notice periods.
Best AI contract review tools compared
| Tool | Best for | Price checked October 2026 | Free option |
|---|---|---|---|
| Genie AI | UK small businesses that want a free start | Free plan; Pro from $59 per month | Yes |
| Legitt AI | Low cost monthly review | $14.99 per month (Lite plan), 15 day trial | Trial |
| ContractCrab | 5 to 30 contracts a month | $3 per contract or $30 per month | No |
| ChatGPT Plus or Claude Pro | One off checks and quick questions | Free tiers; $20 per month paid | Yes |
| goHeather | Small firms that live in Microsoft Word | $400 per month, or $200 per month billed annually | Trial |
| Spellbook | Lawyers who draft and review in Word | About $89 to $159 per user per month, quote based | Trial |
| ContractChecker.uk | UK contracts, pay per check | £9.99 per check; first check £4.99 | No |
| QuickLegalCheck | One off UK contract check | £49 plus VAT per contract | No |
Prices change, so check the vendor page before you buy.
Genie AI: best UK option with a free plan
Genie AI is the easiest starting point for a UK small business. It publishes its pricing instead of hiding it behind a demo, and the free plan lets you try real contract review before you pay.
Legitt AI: best low cost monthly plan
Legitt AI is the cheapest dedicated reviewer here. Lite costs $14.99 per month after a 15 day trial, with structured risk scoring and plain English explanations in the browser.
ContractCrab: best for regular volume
ContractCrab fits businesses that review 5 to 30 contracts a month. At $3 per contract or $30 per month for up to 120 contracts, it is the cheapest per-contract option for steady volume, with structured risk scoring and bulk upload.
ChatGPT and Claude: best free first pass
For a single NDA or freelance agreement, a free ChatGPT or Claude account is often enough. Upload the contract and ask for a plain English summary and a list of risky clauses. Paid plans cost $20 per month. The catch is that neither tool scores risk, applies a playbook or redlines in Word. Good prompts make a real difference, so learn how to write better AI prompts for business before you rely on a chatbot for contract work.
goHeather and Spellbook: best for Word users
If you live in Word, an add-in saves the most time. goHeather is written for the person who signs contracts but is not a lawyer: founders, finance managers and operations leads. It costs $400 per month, or $200 per month billed annually, which puts it out of reach for most micro businesses. Spellbook is built for transactional lawyers at about $89 to $159 per user per month on a quote.
Enterprise tools to skip
Harvey AI and Luminance dominate legal AI headlines, but neither is built for a small business. Both sell through enterprise sales only, with no public pricing and five and six figure annual contracts. SpotDraft and LawGeex are the same story.
UK options priced in pounds
Most roundups quote US dollars, which hides the real cost for a UK buyer. ContractChecker.uk charges £9.99 per check, with a first check at £4.99, and says its AI is trained on UK statutes and case law. QuickLegalCheck charges £49 plus VAT per contract for a clause by clause report rated red, amber or green for your side, reviewed under English law. Unwildered offers a free review of 5 pages, then £15 per month for 30 pages. 360 Business Law offers AiLa reviews from £17.50 plus VAT for simple agreements and £87.50 for complex ones.
Which tool fits your contract type
| Contract type | Best pick | Why |
|---|---|---|
| NDA | Legitt AI or Genie AI free plan | Short and standard |
| Supplier agreement | Genie AI or ContractCrab | Repeat volume, so a playbook helps |
| Client or freelance agreement | ContractChecker.uk or ChatGPT first pass | Pay per contract, not monthly |
| Lease or tenancy | Solicitor, AI only for a first read | High value and long term |
| Employment contract | Solicitor, AI only for a first read | Statutory rights are involved |
Before you sign a supplier agreement, check the supplier itself with our guide on how to use AI for market research for a small business.
How accurate are AI contract reviews?
AI contract review is good at the mechanical work: spotting missing clauses, unusual payment terms, auto renewal traps and one sided liability wording. It is weaker at context. AI tools can also hallucinate, which means they can state a wrong clause with total confidence. Always read the flagged section in the original document yourself. The Solicitors Regulation Authority says a firm stays responsible for the outputs of AI it uses, and a UK court in 2025 held that lawyers must check AI assisted research. Use AI review as a filter, then decide yourself, with a solicitor for anything high value, long term or unusual.
How to review a contract with AI in 5 steps
- Redact what the tool does not need. Remove bank details and personal data before you upload, and check the privacy policy first. goHeather states it does not use customer data to train its models, and QuickLegalCheck states your contract is never used to train AI.
- Ask for a plain English summary. What does each side have to do, what does it cost, and when can either side end it?
- Ask for red, amber and green risk flags. Focus on payment terms, termination, liability caps, auto renewal and intellectual property.
- Compare the contract against your own checklist of the five terms you never accept.
- Keep a human in the loop. Store the reviewed contract and its renewal dates somewhere searchable. Our roundup of the best AI document management tools for small business shows tools that pull out dates and renewal terms automatically.
What AI contract review cannot do
An AI review is general information, not legal advice. It cannot decide whether a risk is acceptable for your business, it cannot advise you in a dispute, and it cannot sign off a contract. For reserved legal work you need a regulated solicitor.
Frequently asked questions
Is AI contract review legal advice?
No. AI contract review tools give you a structured reading of a document, not legal advice. For anything high value or unusual you should still ask a solicitor.
How much does AI contract review cost for a small business?
From free to about $400 per month. A free ChatGPT or Claude account covers occasional checks. Legitt AI costs $14.99 per month, Genie AI Pro starts at $59 per month, and ContractCrab costs $3 per contract. UK pay per check services charge £4.99 to £49 plus VAT per contract.
Can ChatGPT review a contract?
Yes, as a first pass. Upload the contract and ask for a plain English summary and a list of risky clauses. It does not score risk, apply a playbook or redline in Word, so pair it with a dedicated tool for anything you sign regularly.
Do I still need a solicitor if I use an AI contract tool?
Yes, for high value, long term or unusual contracts. Only a solicitor can advise whether a risk is acceptable and sign off the decision.
Conclusion
For most UK small businesses, Genie AI is the best starting point: UK based, with a free plan and published prices. Legitt AI is the cheapest monthly plan, ContractCrab is the best value at steady volume, and a free chatbot covers the occasional one off check. Match the tool to your contract type, keep a human in the loop, and send high value contracts to a solicitor.
