kolum.earth CBAM Software Review 2026: Supplier Data Depth, Quote-Only Pricing

kolum.earth is a Berlin-based trade compliance platform whose EU CBAM module runs the importer obligation chain end to end: supplier emissions data collection with guided workflows in 20+ languages, emissions calculation from default or actual values, declaration preparation with formatted exports for the EU registry, and scenario-based certificate cost forecasting. EU importers of CBAM goods that need actual emissions data from non-EU suppliers, particularly German-speaking mid-market industrial companies, should shortlist kolum. Importers that require published pricing, a multi-regulation suite that ships today, or direct CBAM Registry API integration should compare alternatives before committing. Businesses importing under the 50-tonne annual de minimis threshold, which exempts roughly 90% of EU importers (about 182,000 businesses), do not need paid CBAM software at all. Pricing is quote-based with no public tiers as of July 2026.

This review maps kolum's shipped features against the definitive-phase obligations under Regulation (EU) 2023/956 as amended by Regulation (EU) 2025/2083, examines the pricing model, compares kolum with three alternatives from our best CBAM software roundup, and lists the limitations a buyer should raise in a demo.

What kolum Does for CBAM Compliance

kolum's EU CBAM module covers four operational obligations of an authorized declarant: collecting supplier emissions data, calculating embedded emissions, preparing the annual declaration, and managing certificate costs. The vendor positions the module as "one audit-ready system, ready for the definitive period in 2026," and its shipped scope matches that claim for EU CBAM specifically. The table below maps each product feature to the regulatory obligation it serves.

Supplier Data Collection

Supplier data collection is kolum's clearest differentiator. Importers invite third-country suppliers into the platform, request installation-level emissions data, and guide them through structured workflows available in more than 20 languages. Language coverage matters in practice: the production managers who hold fuel and electricity data at a Turkish steel mill or a Vietnamese fastener plant rarely work in English, and unanswered data requests force importers back onto default values with punitive mark-ups. Actual data still requires confirmation by an accredited verifier before it enters the declaration, a step covered in our CBAM verification guide, and no software vendor can replace that verification.

kolum adds a sourcing angle on top of collection: the platform compares suppliers on their embedded emissions so an importer can shift volume toward lower-emission installations and reduce its certificate bill. With the CBAM factor at 2.5% in 2026 the savings are small, but the factor rises every year to 100% by 2034, so supplier comparison compounds in value.

Emissions Calculation and Declaration Preparation

The calculation engine works from either EU default values or actual supplier data, mirroring the two methods permitted in the definitive phase. Where suppliers do not respond, the platform falls back to the CBAM default values published in Implementing Regulation (EU) 2025/2621. Calculated totals feed into declaration preparation, and kolum produces what it calls "audit-ready exports for the EU registry." One precision matters here: these are formatted export files, not a direct API connection into the CBAM Registry. The declarant still files the annual CBAM declaration itself.

Certificate Cost Management

kolum's certificate module handles forecasting and scenario planning ahead of the February 1, 2027 sales opening. Scenario-based planning addresses the two levers that move an importer's bill: the certificate price, currently EUR 75.28/tCO2e for Q2 2026 (published July 6, 2026, tracked in our price tracker), and the import mix across suppliers and CN codes. From February 2027, authorized declarants must also hold certificates covering at least 50% of cumulative embedded emissions at each quarter end, a mechanic explained in our CBAM certificates guide, which turns cost forecasting from a budgeting exercise into a quarterly cash-flow requirement.

The Free CBAM Cost Calculator

kolum publishes a free on-page CBAM cost calculator that estimates certificate costs from three inputs: country of production, product CN code, and import quantity, with optional fields for actual emissions values. The calculator applies EU default values per CN code and country, product benchmarks, the 2026 phase-in (97.5% free allocation remaining, a CBAM factor of 2.5%), and the official Q1 2026 certificate price of EUR 75.36/tCO2e, citing Regulations (EU) 2025/2621 and 2025/2620. As of July 10, 2026, the page ranked at or near the top of search results for "CBAM calculator" in a single-locale check, which explains a large share of kolum's inbound visibility.

Two disclosed limitations apply to the calculator's output:

• It does not factor in deductions for carbon prices already paid in the country of origin (the Article 9 deduction), so results overstate costs for imports from countries with domestic carbon pricing.
• Results carry no accuracy guarantee, per the page's own disclaimer.

At the time of writing the tool also priced against the Q1 2026 figure of EUR 75.36 rather than the current Q2 2026 price of EUR 75.28. The gap is 8 cents per tonne and immaterial for screening estimates. For a second opinion, our own CBAM calculator runs the same default-value methodology.

Beyond the calculator, kolum invests heavily in free content: the CBAM Weekly newsletter, an English and German regulatory blog, live and on-demand webinars, and customer case studies. Buyers can evaluate the team's regulatory fluency from that material before booking a demo.

kolum Pricing

kolum publishes no prices. As of July 2026, pricing is quote-based and modular: the site's pricing copy reads "One platform. Choose the modules you need," lists "Custom" as the only price value, and routes every path to a demo booking. There are no published tiers, no per-seat or per-declaration rates, and no stated free-trial terms. A signup route exists, but the sales motion is demo-led.

For budgeting purposes this means three things:

1. Expect a sales conversation before any number appears. Prepare your import volumes, supplier count, and CN code list to get a usable quote.
2. Modular pricing suggests the EU CBAM module is priced separately from the announced UK CBAM and EUDR modules, so quotes should be compared on EU CBAM scope alone.
3. The free calculator and content library are genuinely free, so pre-purchase evaluation costs nothing but time.

Company context belongs in any vendor risk assessment. kolum is operated by kolum GmbH in Berlin, with managing directors Marius Sprenger and Helge Wieggrefe. Wieggrefe is a doctoral candidate at the University of Münster who has researched CBAM's legal implications since 2021. The company raised a EUR 2.1 million pre-seed round announced in July 2024, led by FoodLabs, with angels including Anna Alex (Planetly) and Janine Lampprecht (Grenzlotsen). Named customers are German industrial importers, including DENIOS SE, Böllhoff, Keller & Kalmbach, HD-Möbelzubehör, and A+R Profilstahl, plus a partnership with customs broker Ziegler GmbH. Vendor-published case studies report outcomes such as Böllhoff obtaining over 70% actual emissions data from suppliers; these figures are marketing claims and not independently audited.

kolum vs Coolset, CBAMBOO, and CarbonChain

kolum competes most directly with CBAM-focused and carbon-data platforms serving EU importers; the right choice depends on whether you need CBAM depth, a broader sustainability suite, or commodity-grade emissions data. The table below positions kolum against three alternatives we review in this cluster. Full scoring for all vendors sits in the best CBAM software roundup.

Two selection heuristics follow from this comparison. Importers whose CBAM exposure is one obligation among a stack of EU frameworks (CSRD, EUDR, packaging rules) should weigh suite platforms first. Importers whose exposure is concentrated in high-volume metal flows should weigh commodity-specialist data depth first, and can compare embedded emissions benchmarks for steel and aluminium in our sector guides.

Limitations of kolum

Six limitations stand out from public material, and each is worth raising in a demo:

• No public pricing. Quote-only pricing (as of July 2026) prevents self-service budgeting and comparison. Competitors that publish tiers make procurement faster.
• The shipped product is essentially EU CBAM today. UK CBAM (for the 2027 UK levy), EUDR geolocation capture, F-Gas tracking, and automated customs filings are marketed as coming soon. Buyers purchasing for the "holistic trade compliance" vision are buying a roadmap.
• No direct registry integration. "Audit-ready exports" means formatted files. The declarant still performs the filing in the CBAM Registry.
• Calculator excludes Article 9 deductions. Imports from countries with domestic carbon prices get overstated estimates.
• Case-study metrics are vendor-published. Figures such as Böllhoff's 70%+ actual-data rate are not independently audited.
• Early-stage vendor. A pre-seed company (EUR 2.1 million, announced July 2024) carries more continuity risk than an established vendor, a standard consideration when a tool will hold four years of compliance records. kolum also describes itself as AI-first; the depth of that AI functionality is not verifiable from public material.

None of these limitations undermines the core EU CBAM workflow. They define the boundary between what kolum ships now and what it markets.

How We Evaluate CBAM Software

cbamguide.com is an independent editorial site. We accept no affiliate commissions, referral fees, or vendor payments for reviews, and vendor links on this page point to plain homepages (kolum's is kolum.earth). Every factual claim in this review comes from kolum's own published site content, its legal imprint, and press coverage of its funding round, all checked on July 10, 2026. Statements we could not verify independently, including case-study outcomes and the AI-first positioning, are marked as vendor claims. We evaluate every tool against the actual obligations in Regulation (EU) 2023/956: supplier data collection, emissions calculation, declaration preparation, and certificate management, on the deadlines set out in our CBAM timeline. kolum did not review or approve this article.

kolum CBAM Software: Frequently Asked Questions

How Much Does kolum Cost?

kolum does not publish prices. As of July 2026, pricing is quote-based and modular, with "Custom" as the only listed price value and a demo booking as the entry point. The on-page CBAM cost calculator, newsletter, blog, and webinars are free. Importers should bring import volumes, supplier counts, and CN codes to a demo to obtain a comparable quote in EUR.

Does kolum File the CBAM Declaration Directly With the EU Registry?

No. kolum produces formatted, audit-ready export files for the EU registry; it does not claim a direct API connection. The authorized declarant files the annual declaration in the CBAM Registry itself, with the first deadline on September 30, 2027 for calendar-year 2026 imports.

Does kolum Cover UK CBAM and EUDR?

Not yet as shipped product. UK CBAM (targeting the UK levy expected in 2027), EUDR geolocation capture, F-Gas tracking, and automated customs filings are marketed as coming soon. The module available today is EU CBAM, covering supplier data collection, emissions calculation, declaration preparation, and certificate cost forecasting.

Is the kolum CBAM Calculator Accurate?

The calculator is a screening tool, not a compliance calculation. It applies EU default values per CN code and country, the 2026 CBAM factor of 2.5%, and the official Q1 2026 certificate price of EUR 75.36/tCO2e. It excludes deductions for carbon prices paid in the country of origin and carries no accuracy guarantee per its own disclaimer. Binding figures require verified installation-level data.

Who Should Choose kolum Over Other CBAM Software?

EU importers whose main bottleneck is getting actual emissions data from non-EU suppliers are the strongest fit, especially German-speaking mid-market industrial companies resembling kolum's named customers (DENIOS SE, Böllhoff, Keller & Kalmbach). Importers below the 50-tonne de minimis threshold need no software, and importers wanting published pricing or a multi-framework suite that ships today should compare the alternatives in our best CBAM software roundup.