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.
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Solutions
Overview
Built for every side of the contract. One commercial record the whole project team can trust, head contract to supplier.
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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.
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Get started
See it on your project
A 30-minute walkthrough on your numbers, where the margin usually leaks.
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Pricing
Media

On the record.

Conversations about why construction still runs its money on spreadsheets, and what it takes to change that.

Pick My Brain with Alan Jones · 28 July 2026 · 22 min

Selling software to an industry that won’t change.

Watch on YouTube ↗

Around $320 billion a year moves through Australian commercial construction, and a great deal of it still moves on spreadsheets and re-keyed purchase orders. That figure opens the episode, and it is the problem ClaimStack was built for.

Mitchell spent twelve years as a contract administrator before writing a line of this product — on John Holland’s $250M shopping-centre rebuild, and on Facebook’s £150M London headquarters with Kier. The pattern was the same on both: capable, well-paid people spending their days copying data that already existed somewhere else.

Recorded at Cremorne Digital Hub for the Melbourne edition, the conversation goes at the genuinely hard part — not the software, but selling it into an industry that has been sold to badly before and has learned to say no.

Chapters.

00:00Intro: $320B a year, still moving on spreadsheets02:07What ClaimStack does: one platform for the whole contractor chain02:36The inefficiency it targets03:35Twelve years in the trenches: John Holland and Facebook’s London HQ05:32Live in market: onboarding the first pilot customers05:55Building it solo06:45Why he didn’t wait for a co-founder07:43Funding the dream11:08Selling into an industry that resists new software14:26Building a sales team without losing credibility15:37Marketing yourself with a LinkedIn feature series17:48A solo founder’s leadership gaps, and the ESOP19:26Wrap-up
Writing about construction?
We’ll talk.