California climate disclosure on its own — your SB-253 Scope 1/2/3 inventory and your SB-261 climate-risk report, with the GHG numbers prepared straight from your records.

Who is Carbon US for?

Carbon US is for California-exposed US enterprises (SB-253 / SB-261) — design-partner stage.

Is Carbon US available today?

Carbon US is at the design-partner stage: built on open standards and seeking its first design partner, not yet generally available.

Carbon US

For companies caught by California's climate-disclosure laws. Prepare your SB-253 greenhouse-gas inventory (Scope 1, 2 and 3) and your SB-261 climate-related financial-risk report from one carbon ledger, with the emissions figures worked out from your own records — structured and checkable, not a slide deck.

Design-partner stage. The SB-253 inventory engine and the SB-261 report structure are built and tested, and run end-to-end against your Nakitte carbon ledger today. Carbon US isn't generally available yet — we're looking for a first US design partner. The standalone packaging that reads from your existing systems, and the parts that depend on California's reporting portal, are still ahead of us. We'd rather be straight about that than oversell.

What's already built

Your SB-253 greenhouse-gas inventory

A SB-253 Scope 1/2/3 inventory, generated from your data — Scope 1, Scope 2 and, where you have the data, Scope 3 by value-chain category are filled in straight from your carbon ledger and frozen the moment you generate, so the numbers always match the year they were taken from. Measured on the GHG Protocol, the basis SB-253 points to.
The inventory is rendered as a structured SB-253 document, validated against the standard's schema before it's produced and stamped with an integrity hash — so the inventory you keep is provably the one that was generated.

Your SB-261 climate-risk report

A climate-related financial-risk report on the TCFD framework (or IFRS S2): governance, strategy and risk management are yours to write as structured input — we never auto-word them or pass them off as a machine-made claim.
An on-screen workspace ties both laws together: write the TCFD sections, set your targets and internal carbon price, then generate, validate and download each report.

Honest about assurance and filing

SB-253 requires the inventory to be assured by a third party, and SB-261 requires the risk report to be published on your website. We do neither: the report records the assurance level your own auditor has given (none, unless you say otherwise — we never assure), and you file with CARB and publish the report yourself. The document says so plainly.

Coming soon

Reading from your existing systemsComing soon — today the figures come from the Nakitte carbon ledger; the connector that pulls activity data from systems you already run turns on with the first US design partner.
CARB reporting-portal formatComing soon — we render a structured, validated document now; the official California reporting/tagging format is added once CARB publishes it.
Quantified financial-impact and scenario analysisComing soon — the SB-261 narrative is structured free text today; deeper quantified risk modelling lands as a paying engagement needs it.
Market-based Scope 2Coming soon — Scope 2 is reported location-based today; contractual-instrument (market-based) accounting comes later.

Frequently asked questions

What is Carbon US?: California climate disclosure on its own — your SB-253 Scope 1/2/3 inventory and your SB-261 climate-risk report, with the GHG numbers prepared straight from your records.
Who is Carbon US for?: Carbon US is for California-exposed US enterprises (SB-253 / SB-261) — design-partner stage.
Is Carbon US available today?: Carbon US is at the design-partner stage: built on open standards and seeking its first design partner, not yet generally available.