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Custos verifies the carbon quality of every molecule, allowing biomethane’s environmental value to be evidenced in the market.
Biomethane earns additional value through verified carbon intensity. That carbon intensity is shaped across the wider value chain, including feedstock origin, transport, avoided methane, leakage management, and digestate outcomes. Custos extends verification across scope 3 so that this performance can be measured, evidenced, and recognised in the market.
Five levers, each moving the same lever arm: a lower certified carbon intensity, and a claim that holds up under audit.
RED III and most voluntary schemes allow measured actual values where they can be verified. Regulatory defaults carry a deliberate penalty margin. A well-run plant on waste feedstock nearly always has a real carbon intensity below its default, so credible MRV swaps a penalised figure for a truer, lower one. That gap is money in any market that prices carbon intensity.
Slurry and manure avoid methane that would otherwise vent from open storage. Verified properly, that avoided emission can drive carbon intensity below zero, the single highest-value attribute in the market. The claim rests entirely on evidencing the counterfactual and the actual handling, which is scope 3 MRV by definition. Absent that evidence, the negative value stays unbanked.
Fugitive methane across the chain is a heavy penalty and a rising regulatory focus. Measured, verified low leakage improves the carbon intensity and protects the green claim from being discounted by a sceptical buyer or auditor.
A corporate off-taker buys biomethane to cut its own scope 3, since purchased fuel sits inside the buyer's value chain. A plain guarantee of origin supports a soft claim. Granular, chain-of-custody MRV supports a defensible one that survives CSRD and SBTi scrutiny. Under the Green Claims Directive the cost of a claim that fails is climbing, so buyers pay a premium for evidence that holds.
The same verification layer can credit digestate as it displaces synthetic fertiliser, another avoided scope 3 emission that most sites leave uncounted.
Step 1 · Today
Sold on energy value plus a flat certificate. Carbon intensity set by a conservative default.
Step 2 · With CUSTOS
Scope 3 measured and audited. Actual carbon intensity certified, negative where the feedstock earns it.
Step 3 · Result
A defensible scope 3 instrument that commands a higher price from buyers who need the proof.
One verified data layer, three sets of returns.
The capex is sunk and the output is set, so any uplift lands close to pure margin. CUSTOS is a retrofit of the data and verification layer, and it lets your gas clear at a higher price without a single extra cubic metre of production.
Higher price per molecule, minimal new capital.
Verified, granular chain-of-custody data turns a soft green claim into one that stands up under CSRD and SBTi. The premium you pay reflects the compliance and reputational risk the proof removes.
Defensible claims, lower exposure under the Green Claims Directive.
CUSTOS raises the yield of an existing asset by lifting the value of its output, and it hardens the environmental revenue against future scrutiny. That combination improves both the return and the durability of the cash flow underneath it.
Better yield and lower claim risk on assets already built.
The uplift is real, and it is conditional. We would rather say so up front.
Custos pays most where the destination market prices carbon intensity, such as low-carbon transport fuel, sustainable aviation fuel, and discerning corporate off-take, and where the feedstock is waste, slurry, or manure rather than energy crop. In a plain grid-injection market paying a flat certificate with no carbon-intensity signal, the premium is thinner today, though CSRD-driven demand for credible scope 3 data is narrowing that gap.
The commercial test on any given plant is straightforward: whether the carbon-intensity uplift, together with the premium attached to a verified claim, exceeds the cost of running the MRV. We are happy to work that number through on a real site before anyone commits.
Send us the feedstock, the off-take route, and the current carbon-intensity basis, and we will model the uplift CUSTOS unlocks on that specific asset.
