Product
Overview
The commercial operating system for construction. Capture a commercial event once, every downstream workflow stays connected.
See the whole product →
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.
See the plan →
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.
Book a demo →
Pricing
Solutions

One system. Every side of the contract.

Head contractor, subcontractor, consultant, client. ClaimStack is one connected commercial record the whole project team works from, so a claim, variation or commitment means the same thing to everyone on the contract.

One record · every level
↑ Claims & variations flow up. ↓ Assessments & payments flow down. Every level works the same live record.
The connected commercial record

The whole contract chain, on one record.

Most commercial disputes start with two parties working off two different sets of numbers. ClaimStack removes the gap. Every party works the same live record, each sees exactly the contracts they’re on, and every claim, variation and commitment is assessed against the same position. Not eight tools stitched together, one system the whole project team can trust.

Explore by role

See how it fits your side of the contract.

01
Head contractors

You carry the risk. Bring the whole commercial chain into one connected system, so you always know what’s committed, what’s at risk, and where the margin stands.

See the head contractors solution →
02
Subcontractors

Submit progress claims and variations in a consistent, professional format, each one assessed against the live contract. Free to collaborate, or run your own projects.

See the subcontractors solution →
03
Consultants

Fee proposals, progress claims and variations, assessed against the live agreement, with correspondence and deliverables connected to the work they belong to.

See the consultants solution →
04
Clients & developers

Independent visibility of head-contractor claims, variations, forecast and cashflow, so you always know where the project stands, without waiting for a report.

See the clients & developers solution →
How it connects

Capture once. Connect always. Share by contract.

01
Captured once

A variation, claim or commitment is entered at the source, by whoever raises it. No inbox relay, no re-keying.

02
Connected always

The register, forecast, cashflow and cost report all read the same event. Change the truth once and every view moves with it.

03
Shared by contract

Each party sees exactly the contracts they’re on, assessed against the same live position, so numbers never drift between sides.

Explore by need

Or start from the problem you’re solving.

ProcurementPayment claimsVariationsForecastingCost reporting

One record the whole team can trust.

One record, every party
Captured once, never re-keyed
Assessed against the live position
A full audit trail on every event
Unlimited projects & stakeholders
Report on reality, not history
One record.
Every side of the contract.