Carbon accounting that is 80% faster, fully verifiable, and built to unlock real value.
From scoping to verified results in weeks. One platform replaces spreadsheets, consultants, and failed verification rounds.
- 8-week path to verification
- Global verifiers connected
Auto-advancing · hover to pause · click a stage
How CarbonSig works, in five stages. One, scope: define your system boundary and the scopes you cover (Scope 1 direct, Scope 2 energy, Scope 3 value chain). Two, data: emission factors are AI-matched to each input and given a data-quality tier. Three, model: inputs, processes and outputs become one connected system model that computes your product footprint — in this illustrative hydrogen example, 2.6 kilograms of CO₂-equivalent per kilogram. Four, report: an audit-ready System Status Report rates documentation readiness and names the gaps to close. Five, verify: an accredited third party reviews the claim inside the platform until it is Verified on CarbonSig — which opens doors: a CBAM declaration, 45V tier eligibility, green financing and premium low-carbon markets. Independent third-party verification is required separately; figures are illustrative.
27M
CO₂e tracked
tonnes embodied CO₂e calculated
40+
Facilities
industrial facilities modelled & live
59
Pathways
production pathways mapped
5+
Standards
compliance standards supported
5
Patents
patents pending
ISO 14040/44
Engine
compliant calculation engine
Built for the number that has to hold up.
Model once, report to every standard
Build one system model of your product and pathway, then report to CBAM, 45V, EPD, CORSIA and CSRD from the same data. No starting over per framework.
Numbers built to pass audit
Third-party verification runs inside CarbonSig: verifiers review, raise findings, and issue a formal opinion in-platform. Every figure stays traceable from source to certificate.
See where your carbon really is
Pinpoint the processes and suppliers with the highest carbon intensity, so you know exactly where to act.
The old way vs CarbonSig.
The old way
With CarbonSig
Traditional consulting
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Carbon data scattered across spreadsheets and email
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Rebuild the analysis for every regulation
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Verification chased through consultants and inboxes
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A static number you can't trace back
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Hard to see where emissions really come from
One connected platform
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One connected product model, built once
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One model reports to CBAM, 45V, EPD, CORSIA and CSRD
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Third-party verifiers review inside the platform
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Every figure reviewed node by node, source to result
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Hotspots surfaced in a Sankey and bar-chart view
Built for your exact compliance challenge.
Importers & EU suppliers
EU CBAM — the definitive phase, with financial obligations, started January 2026. Verified embedded emissions beat default values.
EU CBAM →Fuel & hydrogen producers
45V is worth up to $3.00/kg — and the credit tier turns on a verified carbon intensity. CORSIA LCAF works from the same model.
45V · CORSIA →Cement, steel & chemicals
EPDs to EN 15804 are the ticket to public procurement and green building schemes. Model the product once, publish the declaration.
EPD / EN 15804 →OEMs & brand owners
CSRD and customer Scope 3 requests both come down to product-level footprints your suppliers can actually deliver.
CSRD · Scope 3 →Verifiers
Review engagements in a structured, read-only workspace — findings pinned to the exact node, round by round.
The Verifier Hub →
A world-first commemorative jersey, measured with CarbonSig.
Liverpool FC and 1PointFive launched a world-first commemorative shirt whose carbon footprint is measured — with CarbonSig — and then removed through Direct Air Capture.
Proof from the people doing the work.
“CarbonSig helped us pinpoint the processes and suppliers with the highest carbon intensity, so we knew where to focus our energy-reduction efforts — and it gave us the credible product carbon footprints our customers require.”
From scoping to verifier handoff in 8 weeks
Click each stage to see what happens — and what the platform looks like at that step.
Scoping & boundaries
You can't measure what you haven't defined. Stage 1 walks you through the decisions that determine everything downstream — boundary, functional unit, and which standard you're working to — using regulation-specific templates.
- Goal & boundary templates — CBAM, 45V, EPD, CORSIA. Start from a compliant structure, not a blank page.
- Boundary definition — a guided tool to set your system boundary and avoid scope gaps from day one.
- Functional unit selection — choose the right unit for your standard, with built-in guidance.
Your primary regulation
Product / material type
Data collection & supplier requests
Data collection is where most projects stall. CarbonSig replaces email chains with structured supplier requests (RFCA). Over 40,000 emission factors are AI-matched to your inputs — and every factor carries a quality tier.
- Supplier request management (RFCA) — send structured requests; suppliers respond at no cost, scored and ready to use.
- AI-matched emission factors — ecoinvent, IPCC, US EPA and EPD International, auto-matched to your process inputs.
- Data-quality tracking — every input rated Primary → Secondary → Proxy, so you always know your data strength.
| Process input | Matched emission factor | Quality |
|---|---|---|
| Grid electricity (DE) | 0.023 kgCO₂e/kWh ecoinvent 3.9 · low-voltage, DE | Primary |
| PEM stack membrane | 2.41 kgCO₂e/kg EPD International · Nafion membrane | Secondary |
| Deionised water | 0.00037 kgCO₂e/kg IPCC AR6 · water treatment | Secondary |
| Compression energy | 0.004 kgCO₂e/kg H₂ EPA 2024 · industrial, 350 bar | Proxy |
One connected model
Your inputs, processes and outputs become one connected system model — the real Builder grammar — computing your product footprint across every scope.
- Node-based system model — inputs, processes, outputs and direct emissions, tagged by scope.
- AI-suggested factors you review — every node arrives as a draft; you approve it, it's yours.
- Every scope, one number — Scopes 1, 2 & 3 roll up to a single verified product footprint.
Reporting & documentation
A carbon model without documentation is an opinion. Stage 4 auto-generates the full evidence package a verifier needs — gap reports, methodology confirmation, and a System Status Report.
- System Status Report — real-time rating of documentation completeness, with specific actions to close any gap.
- Auto-generated documentation — methodology statements, data tables and evidence summaries, formatted to standard.
- Evidence collection — timestamped, version-controlled, every document linked to the data point it supports.
Verified on CarbonSig
Independent verifiers review inside the platform — structured findings, formal opinions, round-based revision — until every part of your claim is signed off and your product is Verified on CarbonSig.
- In-platform verifier review — no email round-trips; findings pin to the exact node they concern.
- Findings & revision rounds — reply in context; a locked snapshot per round keeps the trail clean.
- Verified on CarbonSig — a formal opinion from an accredited third party your buyers can trust.
- System boundary
- Emission factors & data quality
- Evidence & methodology
- Third-party review · 2 rounds
The platform where verification happens inside the tool.
Most carbon tools stop at a number. CarbonSig takes you through third-party review to a verified result — verifier accounts, structured findings, and formal opinions, all in one place.
CarbonSig verification workspace at carbonsig.app. An illustrative steel billet product carbon footprint is under third-party review — round 1, under verification. The system model has five nodes: Iron ore (input, Scope 3, reviewed); Grid electricity (input, Scope 2, incomplete — currently selected); Blast furnace (process, draft); Direct emissions (Scope 1, draft); and Steel billet (output, reviewed, 1.9 kg CO₂e per kg, ISO 14067). One finding is open, pinned to Grid electricity: requirement ISO 14067 data quality — “Activity-data source for grid electricity needs a reference — please attach meter data,” raised by the lead verifier. Verification lifecycle: Self attested, Pending verification, Under verification (current), Revisions requested, Verified on CarbonSig. Verification partner: Bureau Veritas. Implementation partner: Kabyax.
In partnership with
Verification partner: Bureau Veritas — co-developer of the verification module.
Implementation partner: Kabyax
The result that matters.
“The structured data export eliminated the usual back-and-forth. We could focus on assurance, not archaeology.”
“When a client arrives with a CarbonSig package, we know the evidence is there, organised, and has been through a readiness check.”
Every verified product gets a Carbon Receipt.
A CAP — Carbon Attested Product — is a live, shareable record of your product’s verified carbon intensity. Not a static PDF.
628
Verified per CAP
variables verified in each CAP
5+
Standards
mapped per attestation
1-click
Transfer
your customer receives it as an EAC
Independently audited — CarbonSig’s carbon-accounting methodology is certified by GreenCircle (ISO 17065 / ANAB).
See if CarbonSig fits your carbon reporting.
Tell us where you are — a real person from our team will get back to you, usually within one business day.