We build for the carbon number that survives review.
Most carbon software stops at a number. The number is the easy part. What decides whether it is worth anything is whether an independent, accredited third party will put their name to it — so that is what CarbonSig is built around.
What CarbonSig is.
CarbonSig is a product carbon platform operated by Lumini, LLC. It turns production data into a product-level carbon footprint, then routes it through independent third-party verification inside the platform. It works for any manufactured product — steel, aluminium, cement, chemicals, hydrogen and fuels through to consumer goods — wherever a carbon number has to hold up to a regulator, auditor or customer.
Carbon data is everywhere. Carbon data anyone will accept is rare.
Companies already collect enormous amounts of carbon data. Very little of it ever reaches the state a regulator, auditor or customer will accept, because reaching that state was never a software problem — it was a consulting engagement, run in spreadsheets and email, ending in a PDF nobody could re-open and check.
That gap is where compliance stalls, where market access is lost, and where a company that has genuinely decarbonised still cannot prove it. Closing it is the whole reason the company exists: one model, every standard it has to report to, and the verification step built into the same system rather than bolted on after.
We designed backwards from the audit.
Most carbon tools are built to produce a report, and verification is something that happens to the report afterwards. We started at the other end: what does an accredited verifier need in order to sign, and what has to be true of the model for them to get there? Every earlier decision follows from that answer.
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Product-level, not corporate-level
Corporate carbon tools total a company’s emissions for an annual report. We model the carbon embedded in one specific good, fuel or material — which is what CBAM, 45V and an EPD actually ask for. A board-level inventory cannot answer a customs declaration.
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The model is the artifact, not the report
A verifier reviews a live product model — inputs, processes, outputs and the emission factors behind each one — not a finished document describing it. Every node carries its own data state, so what is evidenced and what is still an assumption are visible before anyone is asked to sign.
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Review happens in the system, round by round
The verifier gets read-only access to the registered model and raises findings pinned to the exact node in question. The work is a tracked loop rather than an email thread, which is what makes it repeatable next year instead of a project that starts from nothing again. It ends in a formal opinion and a model marked “Verified on CarbonSig”, with a Carbon Receipt the product carries with it.
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One model answers to many standards
CBAM, 45V, an EPD, CORSIA and CSRD ask overlapping questions of the same production reality. Modelling that reality once and calculating it to each standard is the difference between a repeatable capability and five disconnected projects.
Illustrative — the Builder canvas a verifier reviews. Each node carries its data state as a coloured edge, decoded in the legend.
The same job, run as a system instead of a project.
The consulting engagement
Spreadsheets, email threads, a PDF at the end
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Data is gathered into spreadsheets an outside team assembles and then takes with them.
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The deliverable is a document. Re-opening the reasoning behind it means asking the author.
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Each standard is a fresh engagement, priced and scoped again from the beginning.
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Next year starts over, because the capability never lived in your company.
With CarbonSig
One model your team keeps
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Production data stays in a model you own, in a system your team keeps access to.
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The deliverable is an inspectable model. Any figure can be traced to the node that produced it.
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Another standard is another calculation over the same model, not another project.
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Next year is a re-run against updated data, with last year's reasoning still visible.
We replace the consultant who used to prepare the file. We do not replace the verifier who signs it — that independence is the point, and it is why the verification step is a third party’s, never ours.
Our method has been examined by someone who does not work for us.
Trust in a carbon number comes from the method behind it. CarbonSig’s calculation methodology has been independently audited and certified by GreenCircle — an independent, ANAB-accredited third-party certification body operating to ISO 17065. The method is not self-declared. It has been examined and certified by an impartial third party.
Being precise about what that covers: GreenCircle has certified how the platform calculates. It has not verified any individual customer’s footprint, and it does not make a figure you produce in the platform a verified figure. Your number still goes to an independent accredited verifier for that — which is the whole design.
GreenCircle Certified — CarbonSig’s carbon-accounting methodology, independently audited and certified by GreenCircle (ISO 17065 / ANAB).
Named standards, not a count of them.
A count of standards is not checkable. A list of them is, so here is the list.
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ISO 14040 / 14044
The life-cycle assessment framework the calculation engine is built to — how a product system is defined, bounded and modelled.
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ISO 14067
The product carbon footprint standard: what may be counted, how it is allocated, and how the result must be expressed.
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ISO 14064-3
The verification and validation standard — the one the third party reviewing your model is themselves working to.
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GHG Protocol Product Standard
The product-level accounting rules a verifier expects to see a footprint reconcile against.
Alignment is a constraint we hold the method to. It is not a claim that any of these bodies has certified CarbonSig — the one certification the company holds is the GreenCircle one above. See the standards a footprint reports to.
The model has been checked by people with no commercial interest in the answer.
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Ohio University
Cross-validation of the calculation model — an independent academic check that the engine produces the results the method says it should.
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Hobart & William Smith Colleges
Work on carbon-market taxonomy — the classification underlying how different carbon claims relate to one another.
Who is accountable for it.
Amil Shah
Chief Executive Officer
Leads CarbonSig's mission to make verified carbon accessible across hard-to-abate sectors.
Nick Gogerty
Chief Technology Officer
Decarbonization expert and TEDx speaker; leads the platform and the calculation methodology.
Jonathan Hollander
Chief Product Officer
Professor of Sustainability and advisor; bridges the science and the user experience.
What we do not claim.
Some of these are the difference between a figure that survives review and one that does not, so they are worth being explicit about.
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We are not a verification body
CarbonSig is a pre-verification platform. All carbon calculations should be independently verified by an accredited third party. We host that work; we do not perform it.
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A number you calculate here is not yet a verified number
Until an accredited third party has reviewed the model and issued an opinion, a figure is self-attested. The platform labels the difference rather than blurring it.
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Our technology is patents pending
Patents pending — applications filed, not granted. We say so in those words because the distinction matters to anyone doing diligence.
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We do not promise the outcome
A 45V credit, a green-financing rate, a premium market or a CBAM declaration accepted are things a verified number can unlock — not things a platform can guarantee. An independent verifier is required separately, and costs vary by project scope.
About the company.
Who operates CarbonSig?
CarbonSig is operated by Lumini, LLC. The platform, the calculation engine and the verification workflow are all built and run by the same team.
Is CarbonSig a verification body?
No, and it is important that it is not. CarbonSig is a pre-verification platform: we get a product model to the state an auditor can review, and an independent, accredited third party issues the opinion. We replace the consultant who used to prepare the file, not the verifier who signs it.
What exactly has GreenCircle certified?
GreenCircle has audited and certified CarbonSig's calculation methodology — the way the platform turns production data into a carbon number. GreenCircle is an independent, ANAB-accredited certification body operating to ISO 17065. It is a certification the company holds; it is not a verification of any individual customer's footprint, and it does not make a figure you calculate in the platform a verified figure.
Does a number calculated in CarbonSig count as verified?
Not on its own. A figure you calculate yourself is self-attested. It becomes verified once an independent, accredited third party has reviewed the model and issued a formal opinion on it. The two are never interchangeable, and the platform labels which one you are looking at.
What standards is the methodology built on?
The calculation engine is aligned with ISO 14040 and ISO 14044 for life-cycle assessment, ISO 14067 for product carbon footprints, ISO 14064-3 for verification and validation, and the GHG Protocol Product Standard. Alignment is a design constraint on the method — it is not a claim that any standards body has certified us.
Come and check the work.
The fastest way to judge whether this holds up is to put one of your own products through it.