Trusted by construction teams across the UK
What is it
A QS-level contract review in under 5 minutes
Experienced QS professionals are scarce, expensive, and stretched across too many projects. A thorough contract review takes 1 to 2 days of skilled time, and most commercial teams do not have that during a live tender. The result is contracts signed without anyone reading the amendments properly.
StoneRise's QS AI is a digital quantity surveyor. It reads every amendment against the original standard form, grades the commercial risk of each clause, identifies which risks can be passed down to subcontractors, and produces a structured report with plain-English commentary and a specific negotiation action per clause.
It is not a chatbot. It does the work, and every output is presented to a human to review and approve before it is used.
What the report includes for every clause
Original wording
The exact text from the standard form contract, showing what the clause said before the employer changed it.
Proposed amendment
What the employer is asking you to accept instead.
Risk grade
Each clause rated High, Medium or Low risk with the exposure explained clearly.
QS commentary
Plain-English explanation of the commercial consequence of the change, referencing the relevant contract clauses.
Downstream passthrough
Identifies which risks can be flowed down to subcontractors and which you will need to carry yourself.
Negotiation action
A specific position to take back to the employer on every high and medium risk clause.
Output: downloadable CSV or Excel. Also includes an overall contract RAG rating and executive summary.
Time to review a 35-clause schedule of amendments
Reading each original clause · reading each amendment · forming a commercial view · writing notes
Upload document · AI extracts, matches and reviews every clause · report ready to download
Under 5 min
to review a full schedule of amendments
3–5 hrs
returned to your commercial team per contract
How much time does this save
Half a day of QS time returned on every contract
A proper manual contract review, where a QS reads each original clause against the amendment and writes a commercial position, takes between 3 and 5 hours depending on document length. That is the better part of a day's work.
Most commercial teams do not have that time on a live tender. The realistic alternative is a 20-minute skim, meaning the majority of amendments are signed without a real review.
StoneRise completes the same review in under 5 minutes. Your QS gets a structured report to sense-check and act on, not a blank document to work through from scratch.
How much money does this save
One missed clause can cost more than the contract is worth
The direct saving is QS time: at a day rate of £400–£600, a 4-hour review avoided on each contract adds up quickly across a tender programme. But that is not where the real value is.
The value is in the clauses you would otherwise have missed. A payment period reduced from 30 to 14 days. LADs increased from £500 to £2,500 per day. An indemnity clause flipped from mutual to one-way. Each of those amendments can cost far more than the time saved if you sign without negotiating them.
StoneRise gives every contract the same level of scrutiny regardless of how much time is available, so nothing slips through because the programme was tight.
Examples of what a missed amendment costs
Liquidated damages (Cl. 2.21)
£140,000LADs increased from £500/day to £2,500/day. Project runs 10 weeks late.
additional exposure vs standard form
Payment period (Cl. 4.6.2)
£160K+Payment period halved from 30 to 14 days on a £2M contract with monthly valuations.
average additional cash tied up at any one time
Retention (Cl. 4.9)
£30,000Retention increased from 3% to 5% on a £1.5M contract with no release mechanism.
additional cash held without a release date
Figures are illustrative examples based on typical UK construction contract scenarios.
How do we know it is accurate
AI you can stand behind in a dispute. It never makes facts up.
In commercial and contractual work, a single invented fact can be very costly. StoneRise's QS AI is built to a target of 98% factual accuracy and is designed so it never fabricates a contract clause, a piece of law, or a price. Every fact it states is traceable back to a real source. If it cannot find something, it says so rather than guessing.
Every output shows its reasoning and cites its sources, so your QS can see exactly why a clause was graded the way it was, and verify it before approving. Nothing is a black box.
And critically: no output is ever final until a person approves it. The QS AI accelerates the expert. It never replaces their final say.
≥98%
target factual accuracy. Never fabricates a clause, law, or price.
3 layers
of independent AI validation before the report reaches you.
Human sign-off
required on every output before it is used. You stay in control.
How the validation chain works
AI extracts every amendment clause
ExtractionThe amendment document is processed and every clause is identified: reference, topic, full text.
AI finds the matching baseline clause
MatchingFor each amendment, a second AI searches the indexed standard form library, handling JCT notation differences, word-order variations and abbreviations.
Validator AI confirms or rejects each match
ValidationA separate AI reads both clauses side by side and either confirms the match or rejects it with specific guidance. If rejected, the matcher retries up to 3 times using that guidance.
AI assigns RAG rating and commentary
ReviewActing as a QS, the AI reviews the delta between original and amended wording and rates the commercial impact. Each clause gets a rating, commentary and negotiation action.
Independent Quality AI cross-checks every rating
Quality checkA completely separate AI re-reads the clause and the rating, checks calibration accuracy, detects hallucinations and corrects any errors before output is accepted.
Module and cost
Part of the StoneRise QS AI platform
AI Contract Review is one of 18 capabilities within StoneRise's QS AI platform. It sits inside the Commercial App alongside subcontractor payment applications, variation management, main contract management and commercial analytics.
The Commercial App is priced per user per month. AI Contract Review is included and there is no separate per-review charge for standard usage. If your volume is unusually high, we will talk to you about it before it becomes an issue.
Book a Free DemoQS AI · Commercial App
StoneRise digital QS platform
Pricing
£100 / user / month
AI Contract Review included. No per-review charge for standard usage.
See it run on a real schedule of amendments
Qualifying main contractors get 3 months free. Book a demo and we will run AI Contract Review live against an amendment document and you will see the full report, including RED clauses, commentary and negotiation actions.
- What you will see in your demo:
- Live AI review of a real schedule of amendments
- Clause-by-clause risk grades with QS commentary
- Negotiation actions on every high-risk clause
- Commercial App walkthrough: variations, payment apps, analytics
- Pricing and implementation with no surprises
Book a Free Demo
Takes 30 seconds. Confirmed within one working day.