Track emissions. Prove the numbers.
Field evidence capture, DEFRA 2025 calculations, immutable snapshots, and audit-ready reports — built for construction, waste haulage, and supply chains.
100%
Audit traceable
3×
Faster reporting
SECR
Compliant ready
Why CarbonSite
Carbon data that holds up under audit.
Most teams manage emissions in spreadsheets. Data lives in email attachments, calculations are manually totalled, and figures change between drafts with no record of why.
CarbonSite replaces that with a proper accounting system — field evidence, structured review, deterministic calculation, and immutable publication. Every figure is traceable to a source document and a named emission factor.
Full platform overviewEverything in one place.
Mobile field capture
Field workers photograph documents on-site. Our technology automatically extracts the key data — weight, dates, supplier names, locations. Works without internet.
Review and approval
Every submission goes to a review queue. Your team inspects the data, assigns categories, adds notes, and approves. Full history and comments are kept for compliance.
Emissions calculation
Our engine uses the latest emissions standards (DEFRA 2025, EPA). It covers Scope 1, 2, and 3 emissions. Every calculation is recorded with which factors were used and when.
Locked records
Once you publish a calculation, it's locked and can't be changed. This protects your historical data and makes audits simpler. Previous versions are always available.
Reports for auditors
Generate PDF and Excel reports that auditors expect. Every number in the report traces back to its source — the data you entered, the standards used, and when you made changes.
Role-based access
Admins manage settings. Editors and reviewers handle data. Field workers submit from the job site. Viewers read reports. Auditors see completed periods only.
Four stages, end to end.
Collect
Capture data from mobile phones or upload spreadsheets. Everything is checked for accuracy before it enters your system.
Review
Your team reviews every piece of data before it counts. Check the evidence, assign categories, approve or request changes.
Calculate
Select your reporting period and run the calculation. The system converts all your data to standard units and calculates emissions using current standards.
Publish
Lock in your results and generate reports. Once published, the numbers can't be accidentally changed. Share reports with stakeholders or auditors.
Evidence captured at the point of activity.
Field workers photograph waste tickets and delivery notes on-site. The app automatically reads the data instantly — weight, EWC code, vehicle registration, date. No connectivity required.
Submissions save locally first and sync in the background when the device has signal. GPS-tagged for route distance calculations and audit trail.
About the field appData extracted
Weight
4.2 t
EWC
17 09 04
Vehicle
AB12 CDE
Date
25 Aug 2026
Get started today
Start tracking emissions correctly.
Create a free organisation. Run your first calculation in under an hour. No spreadsheet engineering, no paid APIs.