Product
Overview
The commercial operating system for construction. Capture a commercial event once, every downstream workflow stays connected.
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Estimate & tender
Tendering
Documents & comms
DocumentsCorrespondence
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
Product/Documents

Every document, in the record.

A project document register that versions, marks up, transmits and approves every drawing and file. Upload your own or import from Procore, Aconex and email, and AI reads the titleblock so each document files itself, tied to the project and contract it belongs to.

From upload to transmittal, every document stays tied to the job.

01 · Capture

Upload your own. AI does the filing.

Upload your own drawings and files, or import from Procore, Aconex and email. AI reads each titleblock and extracts the drawing number, revision, title and discipline, so every document files itself in the register with full version history, and nothing is lost across inboxes.

A-201 · Architectural
North & east elevations
3 revisions
Rev ASuperseded05 Mar 2026
First issue for coordination
Rev BSuperseded30 Apr 2026
Window schedule updated; glazing line revised
Rev CCurrent18 Jun 2026
Issued for construction
Full version history kept on the registerRev C current
02 · Markup

Mark up drawings and PDFs in the browser.

Review and annotate drawings and PDFs without leaving ClaimStack. Annotations and zoom persist, so your markup is exactly where you left it the next time the document opens.

A-201 · Rev C · markup
Level 2 general arrangement
100%
OFFICE 2.1MEETINGCIRCULATION3600RFI-014 · clashing duct1
SOCloudClashing duct over meeting rm, RFI-014P1
DKDimensionClear width 3600 confirmedP1
SOArrowConfirm column setoutP1
Annotations & zoom persist to the next open3 markups
03 · Review & approve

Shop drawings through review and QA gates.

Route shop drawings and submittals through a formal review. Reviewers mark them approved, approved with comments or rejected, QA gates catch anything incomplete before it moves, and approval auto-issues the transmittal to the subcontractor with the whole trail on the record.

SD-118 · Rev B · Shop drawing
Precast panel PC-14
Approved w/ comments
SubmittedCoreline Precast · 8 Jul
QA gateTitleblock, references & scope completePassed
Structural reviewD. Okafor · EngineerApproved w/ comments
Architectural reviewStudio North · ArchitectApproved
Auto-transmittalIssued to Coreline Precast · 10 JulIssued
Approval auto-issues the transmittal, with a full QA audit trailAuto-transmitted
04 · Transmit

Issue documents with a formal record.

Send formal transmittals to named recipients with a full record and digest emails, route documents through approval, and keep a needs-review queue and audit trail for everything that moves.

Transmittal · TR-018
For construction
4 documents
ToDelta Formwork Pty Ltd
CcHarbour City Certifiers
Issued25 Jun 2026 · John Smith
S-201Ground slab & footingsRev D
S-310Level 3 framing planRev B
A-101Ground floor planRev C
C-110Bulk earthworks & levelsRev B
Documents transmitted4

How documents move.

STEP 01
Upload & import

Upload your own drawings and files, or import from Procore, Aconex and email.

STEP 02
AI reads & files

AI pulls the drawing number, revision and title from the titleblock, then files each document with version history.

STEP 03
Markup & review

Annotate drawings and PDFs; markup and zoom persist.

STEP 04
Transmit & approve

Issue transmittals, route approvals, keep the audit trail.

Connected to the record

Documents live with the commercial event.

Every document links to the project and the contract it belongs to, so a claim, variation or instruction carries its evidence with it.

Project-linkedEvery document tied to the project it belongs to.
Contract-linkedDocuments attach to the contract, so evidence sits with the event.
Connects inProcore, Aconex and email flow documents into the register.
Binder PDFsSplit and merge documents into issue-ready binders.
One
Source for every document
0
Lost versions
∞
Version history
1
Connected record
Stop losing documents
across inboxes.