Product
Overview
The commercial operating system for construction. Capture a commercial event once, every downstream workflow stays connected.
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Contract models
Fixed, cost plus & open book
Claim a fixed sum, reimburse at actual cost, or bill fully open book. ClaimStack handles each, the right way.
See how →
Solutions
Overview
Built for every side of the contract. One commercial record the whole project team can trust, head contract to supplier.
See how it fits your role →
For subcontractors
Free to collaborate
Invited to a project? Submit claims and variations in a format that holds up, free forever.
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Resources
Overview
Practical guides on claims, variations and contracts, plus how ClaimStack connects, who's behind it, and how we keep your commercial data safe.
Read the blog →
Get started
See it on your project
A 30-minute walkthrough on your numbers, where the margin usually leaks.
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Pricing
CLAIMSTACK

The Commercial Operating System for Construction

Tender to final account.
One connected commercial workflow.
Current reality

Humans are the integration layer.

Documents over here, procurement over there, variations there, forecasting somewhere else. Project teams bridge the gap with memory, email and manual updates.

Commercial eventInboxRegisterForecastPayment claimERPCost report
Every arrow is manual
Cost of the gap
Delay
Duplication
Risk

Every handoff is a chance for commercial truth to arrive late, twice, or not at all.

Commercial timeline

This is where projects make or lose money.

Not at month-end, not when the ERP finally catches up. It is won and lost across the tender, procurement and commercial delivery. Reporting only shows the result.

01
Tender
Price the work
02
Procurement
Commit the work
03 · CORE
Commercial delivery
Make or lose margin
VariationsClaimsForecastsCashflow
04
Financial reporting
Explain the result
05
Company financials
Roll it up
01–03 · where margin is made and lost. We run every step, and commercial delivery in a way legacy tools can’t.04–05 · where history is recorded. Reporting & roll-up.
The decision gap

Risk starts before systems see it.

A commercial event happens today. Traditional reporting sees it after the manual chain finishes. By then it is history.

EventManual updateDisconnected systemWaitingERPHistory
The gap
The opportunity to shape the outcome is here.

At the event, while you can still change the number, not months later at the ERP. By the time it reaches the report, the outcome is already set.

How ClaimStack works

One event. One entry. Everything connected.

ClaimStack captures commercial truth at the moment it happens and keeps the downstream workflow connected.

Input
Commercial event
Operating system
ClaimStack
Forecast
Variation register
Claim position
Cashflow
Cost report
Company financials
Reporting
Contract position
Workflow stack

Not features. A connected commercial chain.

Procurement, contracts, variations, claims, forecasting and reporting should not be separate products pretending to be a system.

01
Procurement
Commitments start connected.
02
Contracts
Positions stay alive.
03
Variations
Events become truth once.
04
Claims
Claims follow reality.
05
Forecasting
Exposure moves early.
06
Cost reporting
Reports stop chasing data.
07
Cashflow
Timing stays visible.
08
Company financials
Portfolio truth rolls up.
AI layer

Your data. Your AI. More intelligence.

AI sits on the connected workflow. It is useful because the commercial truth underneath it is already connected.

Automation
The system follows up when the workflow already knows.
MCP
Approved assistants can read live commercial context.
BYO AI
Use your preferred AI without rebuilding your data layer.
Insights
Ask questions across procurement, claims and forecast truth.
Report on reality.
Not history.