Case study: Carbon border adjustment mechanism (CBAM) implementation — a startup-to-enterprise scale story

The EU's Carbon Border Adjustment Mechanism began its transitional reporting phase in October 2023, and by mid-2025 more than 150,000 importing entities had filed at least one CBAM report covering goods worth an estimated EUR 170 billion annually (European Commission, 2025). Yet a survey of 400 EU importers conducted by Deloitte found that 67% still relied on default emission values rather than actual supplier-specific data, creating a compliance gap that a new generation of climate policy technology startups rushed to fill. This case study traces how three startups built CBAM compliance solutions and scaled from early pilots to enterprise-level adoption, revealing lessons about product-market fit, regulatory timing, and the operational realities of building software for a regulation that was itself still being finalized.

Why It Matters

CBAM represents the most significant intersection of trade policy and climate regulation since the Kyoto Protocol. When the definitive phase begins in January 2026, importers of cement, iron and steel, aluminum, fertilizers, electricity, and hydrogen into the EU will be required to purchase CBAM certificates corresponding to the embedded carbon emissions of their goods. The European Commission estimates the mechanism will cover approximately 50% of EU emissions from covered sectors and generate EUR 10 to 14 billion annually in certificate revenue by 2030 (European Commission, 2025).

For policy and compliance professionals, the stakes are immediate. Companies that fail to submit accurate CBAM declarations face penalties of EUR 50 per tonne of unreported CO2 equivalent, and repeated non-compliance can trigger import restrictions. The UK announced its own Carbon Border Adjustment Mechanism effective January 2027, covering steel, aluminum, cement, ceramics, glass, and hydrogen, while Australia, Canada, and Japan have published consultations on similar instruments. The startups profiled here built the infrastructure that importers need to calculate, report, and optimize their CBAM obligations across these evolving regulatory landscapes.

For compliance teams, the choice of CBAM solution directly affects the accuracy of emissions declarations, the cost of certificate purchases, and the ability to shift from default values to verified supplier data that can reduce financial exposure by 20 to 40% depending on sector and source country.

Key Concepts

Embedded emissions are the greenhouse gas emissions released during the production of goods, including both direct emissions from manufacturing processes and, for certain product categories, indirect emissions from electricity consumed during production. Under CBAM, importers must report embedded emissions using either actual production data from suppliers or default values published by the European Commission, which are typically set at conservative levels that overestimate emissions.

CBAM certificates are instruments that importers must purchase from their national CBAM authority to cover the embedded emissions of imported goods. Certificate prices are linked to the EU Emissions Trading System (ETS) allowance price, which averaged EUR 68 per tonne of CO2 equivalent in 2025. Importers can deduct any carbon price already paid in the country of origin to avoid double taxation.

Transitional reporting refers to the period from October 2023 through December 2025 during which importers must report embedded emissions without purchasing certificates. This phase was designed to allow both regulators and businesses to build capacity, but it also created the initial market for compliance software as importers discovered the complexity of gathering and formatting the required data.

Default values are standardized emission factors published by the European Commission for each covered product and country of origin. They provide a compliance fallback when actual production data is unavailable but typically represent the upper range of emission intensity, resulting in higher certificate costs once the definitive phase begins.

What's Working

Carbmee: From ETS Consulting to Enterprise CBAM Platform

Carbmee, founded in Munich in 2021, initially focused on helping EU manufacturers navigate the Emissions Trading System before pivoting to CBAM compliance software in early 2023 as regulatory details crystallized. The company's founding team included former McKinsey consultants with deep expertise in carbon pricing mechanisms and enterprise procurement workflows. Carbmee raised EUR 7.5 million in seed funding from HV Capital and several climate-focused angel investors, then closed a EUR 22 million Series A in October 2024 led by EQT Ventures (Carbmee, 2025).

The company's initial product targeted mid-market industrial importers bringing steel, aluminum, and cement into the EU. Carbmee's go-to-market strategy focused on companies importing between EUR 10 million and EUR 500 million in CBAM-covered goods annually, a segment large enough to face material financial exposure but typically lacking dedicated carbon compliance teams. Early pilots with three German steel distributors and two chemical companies during the transitional phase demonstrated that automated data collection from suppliers reduced reporting preparation time from an average of 120 person-hours per quarter to 18 person-hours (Carbmee, 2025).

By Q2 2025, Carbmee had scaled to 85 enterprise clients across Germany, France, the Netherlands, and Italy, processing CBAM declarations covering more than EUR 4.2 billion in annual imports. The company's supplier engagement module, which sends structured data requests to non-EU producers and guides them through emissions calculation methodologies, achieved a 71% supplier response rate compared to the 25 to 35% response rate that importers reported when using manual email-based approaches. The critical scaling insight was that CBAM compliance is fundamentally a supplier data problem: the technology that wins is not the one with the most sophisticated carbon accounting engine, but the one that can reliably extract verified emissions data from factories in Turkey, India, China, and North Africa.

Ecospold Analytics: Traceability-First Approach for Complex Supply Chains

Ecospold Analytics launched in Zurich in 2022, taking a different approach by building CBAM compliance on top of supply chain emissions traceability rather than treating it as a standalone reporting exercise. The company's platform integrated with existing enterprise resource planning (ERP) systems, customs data feeds, and supplier management platforms to automatically match import transactions with embedded emission calculations. Founded by a team of lifecycle assessment researchers from ETH Zurich, Ecospold raised CHF 5 million in pre-seed and seed funding from climate venture funds including 2150 and Pale Blue Dot (Ecospold Analytics, 2025).

Ecospold's differentiation came from its database of product-level emission factors covering more than 14,000 industrial product variants across CBAM-covered sectors. While the European Commission published approximately 200 default values organized by product category and country, Ecospold built granular factors that distinguished between different production routes: for example, blast furnace versus electric arc furnace steel, or wet process versus dry process cement. This granularity allowed importers to claim more accurate (and often lower) embedded emissions even before receiving actual supplier data, reducing projected certificate costs by an average of 23% compared to using Commission default values (Ecospold Analytics, 2025).

The company scaled from 5 pilot clients in late 2023 to 62 paying enterprise clients by early 2026. Its largest deployment covered a European automotive manufacturer importing steel, aluminum, and battery materials from 340 suppliers across 18 countries, processing more than 12,000 distinct import line items per quarter. The deployment required 14 weeks of integration with the manufacturer's SAP environment and custom development of supplier data collection workflows for Chinese and South Korean steel mills, which initially had no familiarity with EU carbon reporting requirements.

Clearcarbon: Emerging Market Supplier Enablement

Clearcarbon, founded in London in 2023, identified a gap that neither Carbmee nor Ecospold initially addressed: the non-EU suppliers themselves. While EU importers faced compliance deadlines, the suppliers in India, Turkey, Egypt, and Southeast Asia who needed to provide actual emissions data often lacked the technical capacity, metering infrastructure, and carbon accounting knowledge to do so. Clearcarbon built a supplier-side platform that walked factory operators through emissions measurement, helped them install basic energy monitoring equipment, and generated CBAM-compliant data packages that could be transmitted to any importer's compliance system.

The company raised $4.5 million in seed funding from Seedcamp and Norrsken Foundation in mid-2023 and deployed its first pilots with steel and aluminum producers in Turkey, which is the EU's second-largest source of CBAM-covered imports after China. By early 2025, Clearcarbon had onboarded 180 supplier facilities across Turkey, India, and Egypt, with a particular concentration in Turkish steel (electric arc furnace operations) and Indian cement manufacturing (Clearcarbon, 2025).

Clearcarbon's business model combined a subscription fee paid by suppliers (EUR 200 to EUR 800 per month depending on facility complexity) with a per-transaction fee paid by EU importers who received verified data packages. The dual-sided revenue model was critical for scaling: suppliers were willing to pay because providing actual emissions data rather than having importers use default values preserved their competitive position. Turkish electric arc furnace steel producers, whose actual emissions averaged 0.8 to 1.2 tonnes CO2 per tonne of steel compared to the EU default value of 1.9 tonnes, could demonstrate a significant cost advantage to EU buyers willing to use verified data. This emissions differential translated to certificate cost savings of EUR 50 to EUR 75 per tonne of imported steel at 2025 ETS prices.

What's Not Working

Regulatory uncertainty as a product development risk has challenged all three startups. The European Commission issued 47 technical guidance documents and 12 implementing regulation amendments between October 2023 and December 2025, requiring CBAM software providers to continuously update calculation methodologies, reporting templates, and data validation rules. Carbmee reported dedicating 35% of its engineering capacity to regulatory change management rather than new feature development during 2024, slowing its product roadmap by approximately six months.

Supplier data verification remains a persistent weak point. While platforms can collect emissions data from suppliers, independently verifying that data requires either on-site audits or cross-referencing against energy purchase records, production logs, and utility bills. None of the three startups has fully solved the verification problem at scale. EU customs authorities have signaled that they will begin conducting spot checks on CBAM declarations from mid-2026, creating compliance risk for importers relying on unverified supplier self-declarations.

Market fragmentation across jurisdictions is increasing development costs. The UK's CBAM, announced in December 2024 with a January 2027 effective date, uses different product classifications, emission calculation methodologies, and reporting formats than the EU mechanism. Australia's consultation draft published in February 2025 introduced yet another approach. Startups that built their platforms exclusively around EU CBAM technical specifications face significant re-engineering costs to serve clients exposed to multiple carbon border mechanisms.

Price sensitivity among mid-market importers limits revenue expansion. Many importers with CBAM exposure below EUR 50 million annually view compliance software as a cost center and resist annual contract values above EUR 15,000 to EUR 25,000. At these price points, the unit economics of enterprise sales (long sales cycles, custom integrations, ongoing support) are difficult for startups operating on venture capital timelines.

Key Players

Established Companies

• SAP: integrated basic CBAM reporting modules into its S/4HANA ERP suite, providing default compliance capabilities for existing enterprise customers
• PwC: launched CBAM advisory and managed compliance services across 15 EU member states, processing declarations for clients representing more than EUR 20 billion in covered imports
• Sphera: sustainability data and software provider offering CBAM emission factor databases integrated with its lifecycle assessment platform

Startups

• Carbmee: Munich-based CBAM compliance platform focused on automated supplier data collection and reporting for mid-market and large EU importers
• Ecospold Analytics: Zurich-based platform combining granular emission factor databases with ERP integration for complex multi-supplier CBAM calculations
• Clearcarbon: London-based supplier enablement platform helping non-EU factories measure and report actual embedded emissions for CBAM compliance
• Emitwise: UK carbon accounting platform that expanded into CBAM reporting through its existing supply chain emissions measurement capabilities
• Nexio Projects: Belgian startup specializing in CBAM compliance for the cement and fertilizer sectors with deep industry-specific calculation models

Investors and Funders

• EQT Ventures: led Carbmee's Series A, with a thesis on regulatory compliance software as a durable market opportunity
• Seedcamp: early-stage investor in Clearcarbon, backing the supplier-side enablement approach to CBAM compliance
• 2150: European climate technology venture fund investing in Ecospold Analytics and other built environment decarbonization startups

Action Checklist

• Assess your organization's CBAM exposure by mapping all imports of covered goods (cement, iron and steel, aluminum, fertilizers, electricity, hydrogen) by volume, value, and country of origin
• Compare actual supplier emission data with EU default values to quantify the financial benefit of investing in supplier-specific data collection for your highest-volume import categories
• Evaluate CBAM compliance platforms against your existing ERP and customs data infrastructure, prioritizing solutions with pre-built integrations for your systems
• Engage your top 10 non-EU suppliers in CBAM-covered categories with structured data requests, providing clear guidance on the emission calculation methodology and data formats required
• Establish internal workflows for quarterly CBAM declaration review, assigning clear ownership between procurement, sustainability, and customs compliance teams
• Monitor regulatory developments in the UK, Australia, and other jurisdictions considering carbon border mechanisms to assess future multi-jurisdictional compliance requirements
• Request carbon price deduction documentation from suppliers in countries with existing carbon pricing mechanisms (such as China's national ETS, South Korea's K-ETS, or Turkey's planned ETS) to reduce CBAM certificate costs

FAQ

Q: How much does CBAM compliance software typically cost for a mid-market EU importer? A: Annual license fees for enterprise CBAM compliance platforms range from EUR 12,000 to EUR 80,000 depending on the number of import line items, suppliers, and product categories covered. Carbmee's pricing for mid-market importers (EUR 10 million to EUR 200 million in covered imports) starts at approximately EUR 18,000 per year. Implementation costs add EUR 5,000 to EUR 30,000 for ERP integration and supplier onboarding. For comparison, a mid-market importer relying on default values rather than actual supplier data may overpay by EUR 200,000 to EUR 1.5 million annually in certificate costs once the definitive phase begins, making the software investment payback period typically less than three months.

Q: How long does it take to transition from default values to actual supplier emissions data for CBAM reporting? A: Based on deployment data from the three profiled startups, the transition timeline depends heavily on supplier geography and sector. For Turkish and South Korean suppliers with existing energy management systems, the typical timeline from initial outreach to receiving CBAM-compliant emissions data is 8 to 14 weeks. For Chinese suppliers, where language barriers, data sensitivity concerns, and unfamiliarity with EU carbon reporting add complexity, timelines extend to 16 to 30 weeks. Indian cement and steel suppliers typically fall in between at 12 to 20 weeks. Organizations should plan for at least two quarterly reporting cycles using a hybrid of default values and actual data before achieving full supplier coverage.

Q: What happens if a CBAM declaration is found to be inaccurate after submission? A: Under the CBAM Regulation, importers can submit corrective declarations within a specified period after the original filing. Penalties for inaccurate declarations depend on whether the error results in underreporting of emissions: underreported emissions incur a penalty of EUR 50 per tonne of CO2 equivalent, with additional sanctions possible for systematic or intentional underreporting. Overreporting (which results in purchasing excess certificates) can be corrected through certificate surrender adjustments. All three profiled startups include audit trail and version control features that document calculation methodologies and data sources, which regulators have indicated will be considered as evidence of good faith compliance efforts during enforcement actions.

Q: Will the UK's carbon border mechanism be compatible with EU CBAM reporting? A: The UK's CBAM, effective January 2027, uses the UK ETS allowance price rather than the EU ETS price for certificate pricing and applies different product scope and classification structures. While the underlying concept of embedded emissions reporting is similar, the technical requirements are not interchangeable. Companies exporting to both the EU and UK will need to maintain parallel compliance processes. The UK government has stated it will consider mutual recognition arrangements with the EU, but no formal agreement is expected before 2028. Startups including Carbmee and Emitwise have announced plans to support UK CBAM within their platforms by Q3 2026.

Sources

• European Commission. (2025). CBAM Implementation Report: Transitional Phase Results and Lessons Learned. Brussels: European Commission, DG TAXUD.
• Deloitte. (2025). Carbon Border Adjustment: EU Importer Readiness Survey 2025. London: Deloitte LLP.
• Carbmee. (2025). Platform Impact Report: CBAM Compliance Automation at Scale. Munich: Carbmee GmbH.
• Ecospold Analytics. (2025). Technical White Paper: Granular Emission Factors for CBAM Product Classification. Zurich: Ecospold Analytics AG.
• Clearcarbon. (2025). Supplier Enablement Report: Bridging the CBAM Data Gap in Emerging Markets. London: Clearcarbon Ltd.
• International Carbon Action Partnership. (2025). Emissions Trading Worldwide: Status Report 2025. Berlin: ICAP.
• UK Government. (2025). Carbon Border Adjustment Mechanism: Policy Design and Consultation Response. London: HM Treasury.