CarbonChain is the most commodity-specialized platform of the six CBAM software vendors we review, with a CBAM product concentrated on iron, steel, aluminium, and fertilizers. EU importers of metals or fertilizers who must collect actual emissions data from dozens or hundreds of suppliers before the September 30, 2027 declaration deadline should shortlist CarbonChain; importers whose CBAM exposure sits in cement, electricity, or hydrogen, and businesses importing under the 50-tonne de minimis threshold, should look elsewhere first. The product, sold as CarbonChain Comply, covers the full declarant workflow: automated supplier outreach, emissions calculation with benchmarking, customs data validation, reports aligned with EU templates, and automated XML generation for the EU CBAM Registry. Pricing is quote-based with no public tiers as of July 2026, which places the platform in enterprise procurement territory rather than the self-serve SME bracket. This review maps CarbonChain's features to the actual obligations of the definitive phase under Regulation (EU) 2023/956 and compares it against alternatives from our best CBAM software roundup.
CarbonChain at a Glance
The table below summarizes the verified company and product facts that matter for a CBAM software shortlist.
| Attribute | Detail |
|---|---|
| Website | carbonchain.com |
| CBAM product | CarbonChain Comply, the CBAM module of the CarbonChain platform |
| CBAM sector emphasis | Aluminium, steel, iron, fertilizers |
| CBAM personas served | EU importers and declarants, non-EU producers and installations, traders and intermediaries |
| Headquarters | London, United Kingdom, with a second office in New York |
| Founded | 2019; Y Combinator Summer 2020 cohort |
| Funding | $10M Series A announced April 25, 2023, co-led by Union Square Ventures and Voyager Ventures |
| Leadership | Adam Hearne (CEO), Roheet Shah (COO) |
| Pricing model | Quote-based; no public price list as of July 2026 |
| Assurance and certifications | ISO 27001 certified; methodology validated against the GHG Protocol by SGS; CDP Accredited Provider 2024 |
What Is CarbonChain?
CarbonChain is an enterprise carbon accounting platform for commodity supply chains that offers a dedicated CBAM compliance product for EU importers, non-EU producers, and commodity traders. The company was founded in 2019 in London, went through Y Combinator's Summer 2020 cohort, and raised a $10M Series A in April 2023 co-led by Union Square Ventures and Voyager Ventures. Its customer base spans three groups: manufacturers, commodity traders, and banks financing commodity trades. The team draws on backgrounds from Rio Tinto, BCG, Amazon, Shell, BP, and ERM, which explains the platform's tilt toward metals and mining rather than general corporate sustainability.
Scale claims come from the vendor itself and should be read as marketing figures. CarbonChain states that it holds asset-level data on more than 11,000 commodity suppliers, has completed more than 500 CBAM declarations through the platform, has delivered 1 million product carbon footprints, and has processed 2 billion tonnes of CO₂. A 2023 press release additionally claimed its database covers 80% of global emissions. None of these figures has been independently audited to our knowledge, so treat them as directional evidence of scale, not verified performance data.
What CarbonChain Does for CBAM Compliance
CarbonChain Comply addresses four of the recurring obligations an authorized CBAM declarant carries in the definitive phase: supplier emissions data collection, embedded emissions calculation, annual declaration preparation, and certificate cost planning. The mapping between each obligation and the corresponding platform feature is shown below.
| Declarant obligation | Regulatory anchor | CarbonChain Comply feature |
|---|---|---|
| Collect emissions data from suppliers | Actual values beat default values under IR 2025/2621, which carry punitive mark-ups | Automated supplier outreach; request, track, and manage data from dozens or hundreds of suppliers in one place |
| Calculate embedded emissions | Annual verified total in tCO₂e determines certificates surrendered | Emissions calculation with benchmark comparison against industry peers |
| Reconcile customs data | The annual declaration must match import records | Customs declaration upload with real-time validation |
| Prepare the annual declaration | First deadline September 30, 2027, covering calendar-year 2026 imports | Reports aligned with EU templates; automated XML generation for submission into the EU CBAM Registry |
| Plan certificate costs | Certificate sales open February 1, 2027; quarterly holding of at least 50% of cumulative embedded emissions applies | CBAM cost scenario modelling; free BETA cost estimator covering 2026-2034 |
Supplier Data Collection at Scale
Supplier data collection is the highest-effort CBAM obligation, and it is the function CarbonChain builds its pitch around. Importers who cannot obtain installation-level emissions data must fall back on CBAM default values under Implementing Regulation (EU) 2025/2621, which carry mark-ups that inflate the certificate obligation compared with verified actual data. CarbonChain Comply automates the outreach: declarants request, track, and manage CBAM data submissions from dozens or hundreds of suppliers inside one workspace instead of chasing spreadsheets by email.
Two supporting assets strengthen this workflow. First, CarbonChain publishes a free Supplier Catalogue of steel and aluminium installations with emissions risk ratings, useful for pre-screening suppliers in the steel and aluminium sectors. CarbonChain's own disclaimer states these ratings are modelled estimates derived from unvalidated industry data and should be treated as indicative, not definitive. Second, the platform prepares verification-ready datasets on the supplier side, which matters because every actual-data claim in the first annual declaration, due September 30, 2027, must pass CBAM verification.
Emissions Calculation and Certificate Cost Management
CarbonChain calculates embedded emissions per consignment and models the resulting certificate cost across the 2026-2034 phase-in. The financial context makes this modelling worthwhile: the official Q2 2026 CBAM certificate price is EUR 75.28/tCO₂e, published by the European Commission on July 6, 2026, and the 2026 CBAM factor of 2.5% rises every year until it reaches 100% in 2034. A cost that is negligible on 2026 imports grows into a material line item by the end of the decade, so scenario modelling against EUA price projections is a genuine planning need rather than a gimmick. The mechanics of buying, holding, and surrendering CBAM certificates determine when that cash actually leaves the business, starting with the opening of certificate sales on February 1, 2027.
CarbonChain also offers a free CBAM cost estimator, labeled BETA, which forecasts certificate costs from 2026 to 2034 using EU default values and EUA price projections. Current and historical official certificate prices are tracked on our CBAM price tracker.
Declaration Preparation and Registry Submission
CarbonChain Comply generates the annual declaration output in two forms: reports that follow EU templates and automated XML built for submission directly into the EU CBAM Registry. Real-time validation against uploaded customs declarations reduces the reconciliation errors that surface when import records and emissions records are maintained in separate systems. The legal responsibility does not move, however. The authorized declarant, not the software vendor, files the CBAM declaration and answers for its accuracy in the CBAM Registry. The first filing deadline is September 30, 2027, covering all calendar-year 2026 imports.
Support for Non-EU Producers and Traders
CarbonChain serves the supply side of CBAM, not only the importing side. Non-EU producers and installations use the platform to organize precursor emissions data and prepare verification-ready datasets that their EU customers can rely on, a workflow covered from the opposite direction in our guide for exporters. Traders and intermediaries form the third persona, reflecting CarbonChain's origins in commodity trading and trade finance.
CarbonChain Pricing as of July 2026
CarbonChain publishes no prices. As of July 2026, the site has no pricing page (carbonchain.com/pricing returns a 404), and no tiers or figures appear on the homepage, the CBAM product page, or the product release notes. Budgeting therefore requires a sales conversation, which is typical for enterprise platforms but a real friction point for mid-sized importers comparing quotes.
Four free entry points let you evaluate the platform before committing:
- A free trial of the CBAM product for declarants
- A free CBAM cost estimator (BETA) forecasting certificate costs from 2026 to 2034
- Free supplier risk ratings in the steel and aluminium Supplier Catalogue
- A free corporate carbon footprint calculator
CarbonChain vs CBAMBOO, Coolset, and Kolum
CarbonChain competes with three alternatives in this cluster that approach CBAM from different starting points. The table below summarizes positioning; each linked review carries the verified detail, and the full field is ranked in our best CBAM software roundup.
| Criterion | CarbonChain | CBAMBOO | Coolset |
|---|---|---|---|
| Primary focus | Carbon accounting for commodity supply chains with a dedicated CBAM module | Positions itself as CBAM-dedicated compliance software | Positions itself as a broader carbon management platform that includes CBAM |
| CBAM sector emphasis | Aluminium, steel, iron, fertilizers | Detailed in our CBAMBOO review | Detailed in our Coolset review |
| Public pricing | None; quote-based as of July 2026 | See review | See review |
| Free entry points | Declarant trial, BETA cost estimator, supplier risk ratings, footprint calculator | See review | See review |
| Typical buyer | Enterprise importers, commodity traders, trade-finance banks | See review | See review |
Kolum is the fourth alternative worth checking, particularly for importers who want a CBAM-first tool rather than a commodities platform. The practical selection logic is straightforward. Choose CarbonChain when your CBAM exposure is concentrated in metals or fertilizers, your supplier count is high, and you have enterprise procurement capacity. Choose a CBAM-dedicated or mid-market tool when you import across sectors CarbonChain does not feature, or when you need transparent pricing to get budget approval. All reviewed vendors are indexed on the CBAM software hub.
Limitations of CarbonChain for CBAM
Five limitations stand out from CarbonChain's public materials as of July 2026:
- Sector concentration. CarbonChain's CBAM materials feature aluminium, steel, iron, and fertilizers. Cement, electricity, and hydrogen are not featured in the CarbonChain Comply release notes or CBAM product feature materials. That is an observed scope, not a stated exclusion, so importers in those sectors should confirm coverage directly before shortlisting.
- No public pricing. With no price list and no published tiers, total cost of ownership is unknowable without a sales cycle, and quotes cannot be benchmarked against a public rate card.
- Indicative supplier ratings. The free Supplier Catalogue risk ratings are, by CarbonChain's own disclaimer, modelled estimates from unvalidated industry data. They are a screening aid, not a substitute for verified installation data.
- Enterprise orientation. The platform targets manufacturers, traders, and banks. Importers near the 50-tonne de minimis threshold, which exempts roughly 90% of importers (about 182,000 businesses), are unlikely to need or justify this scale of tooling.
- Unverified scale claims. The supplier-count, declaration-count, and emissions-processed figures are vendor statements without independent audit.
How We Evaluate CBAM Software
cbamguide.com is an independent editorial site. We accept no affiliate commissions, referral fees, or sponsored placements from any vendor in this cluster, and all vendor links are plain homepage links. This disclosure matters here specifically: CarbonChain operates a formal partner program with three tracks (consulting, referral, and reseller), and its referral track pays commission on successful engagements. cbamguide.com does not participate in that program, so nothing in this review is influenced by it. Reviews elsewhere that recommend CarbonChain may be written by paid referral partners, which is worth keeping in mind when you research the vendor.
Our evaluation method is documentary. We assess each vendor against the actual obligations of the definitive phase under Regulation (EU) 2023/956, as amended by Regulation (EU) 2025/2083, using the vendor's public product pages, release notes, and press coverage as of the review date. We do not invent review scores, star ratings, or user quotes, and we flag every vendor-sourced figure as such.
CarbonChain CBAM Software: Common Questions
Does CarbonChain Cover All Six CBAM Sectors?
CarbonChain's CBAM materials feature four of the six covered sectors: aluminium, steel, iron, and fertilizers. Cement, electricity, and hydrogen are not featured in the CarbonChain Comply release notes or CBAM product feature materials as of July 2026. Importers with exposure in those three sectors should ask CarbonChain directly whether the workflow supports them, or evaluate an alternative from the CBAM software hub.
How Much Does CarbonChain Cost?
CarbonChain does not publish prices as of July 2026. There is no pricing page and no tier information on its site, so all paid plans are quote-based. A free trial exists for the declarant-facing CBAM product, alongside a free BETA cost estimator, free supplier risk ratings, and a free corporate footprint calculator, which together allow a meaningful evaluation before any purchase commitment.
Can CarbonChain File My CBAM Declaration for Me?
No software vendor files on your behalf; the authorized declarant remains legally responsible. CarbonChain Comply prepares reports aligned with EU templates and generates the XML for submission into the EU CBAM Registry, and it validates the data against uploaded customs declarations. The declarant then submits the annual declaration by September 30, 2027 for calendar-year 2026 imports, with each subsequent year due September 30. The full deadline sequence is set out in our CBAM timeline.
Is CarbonChain Useful for Non-EU Producers?
Yes. CarbonChain serves non-EU producers and installations as a distinct persona, helping them organize precursor emissions data and prepare verification-ready datasets for their EU customers. Producers supplying EU importers face growing pressure to deliver verified actual data, because default values under IR 2025/2621 carry mark-ups that make unverified supply chains more expensive for the importer.
Do Small Importers Need CBAM Software Like CarbonChain?
Importers below 50 tonnes of covered goods per year owe no CBAM obligations at all under the de minimis exemption, which covers roughly 90% of importers while more than 99% of embedded emissions remain in scope. Small importers above the threshold with a handful of suppliers can often manage with the Commission's registry tools and default values rather than an enterprise platform. CarbonChain's economics point at high-volume, multi-supplier metals and fertilizer importers, not occasional declarants.