How to choose a carbon management platform in 2026
A practical checklist of 12 questions to ask before signing with any emissions management software. Includes criteria for portability, compliance, support, and the contract clauses that make a difference.
Why this matters
Switching carbon management platforms every two years is expensive and risky. The data has to be portable, the methodology has to be auditable, and the support has to actually exist.
A company that chooses badly can lose its inventory history, struggle to migrate to a better vendor, and still keep paying for a system that does not fit. Spending 2-3 weeks on diligence before choosing saves months later.
The 12 questions
Data and calculation
1. Which emission factor databases does the platform use? Which versions?
Expected answer: an explicit list (DEFRA UK 2024, MCTI 2025, ecoinvent 3.10, IPCC AR6, CDP). A platform that answers "we use the main databases" with no detail is a red flag.
2. How are factors updated when new editions come out?
Expected answer: the cadence (annual or half-yearly), the internal validation process, how users are told, and whether historical calculations keep the old factor.
3. Can I export all my data at any time, in an open format?
Expected answer: yes, in CSV, JSON or Excel, including the audit trail line by line. With a contract clause confirming it.
4. Does the audit trail record source, factor, version and owner for every entry?
Expected answer: yes, with a timestamp, the user ID, and the primary data source (PDF, spreadsheet, ERP integration) attached.
Compliance
5. Which frameworks does it generate natively?
GHG Protocol Corporate Standard (1+2+3), ISO 14064-1, IFRS S2, ESRS E1 (CSRD), CDP, GRI 305, SASB, SBTi templates, ABNT NBR ISO 14064. The more native, the less rework.
6. Has the platform been through independent verification?
Expected answer: yes, with a limited or reasonable assurance report available. Plus a list of auditors who have validated inventories produced on the platform.
7. Does it support the CSRD XBRL format?
For companies in CSRD scope: indispensable. Without XBRL it becomes manual tagging work, expensive and fragile.
Support and methodology
8. Is there an internal technical team, or only a call centre?
Expected answer: a multidisciplinary team (engineering, science, accounting, regulation) reachable through a direct channel. A generic call centre will not resolve Scope 3 materiality.
9. Can I reach a specialist within 24 hours?
An explicit SLA. In an audit incident, waiting a week is not viable.
10. Is the consulting included, or is it a cross-sell?
A clear answer on what is included (support for using the product) versus what is an additional service (scenario modelling, drafting an SBTi target, credit due diligence). No grey area.
Business
11. What is the pricing model?
Per user, per module, per tonne managed, per scope covered, per supplier engaged? The model has to fit your growth plan without becoming a trap. Be careful with per-tonne pricing: it penalises a company that improves its coverage.
12. Is there an exit and data portability clause in the contract?
Expected answer: yes, with a reasonable window (30-90 days) for full export after termination. Without that clause, the company is held hostage.
How to assess it in practice
Do not trust a polished demo. Ask for:
- A real trial with your data (standard NDA).
- A technical conversation with the platform's engineering team, not only the salesperson.
- Real cases from a client similar to you, with permission to talk to them.
- A signed audit report for an inventory produced on the platform.
- The contract clause on portability, reviewed by your legal team before signing.
Mangue's answer
For each of the 12 questions above we have a documented answer and explicit contract clauses. We ask you to put the same question to every other vendor; whoever does not answer with the same transparency is telling a different story.
- Require full data export in an open format at any time, with no contractual lock-in.
- Confirm native support for the frameworks you need: GHG Protocol, IFRS S2, CSRD/ESRS, CDP, GRI, SASB, SBTi.
- Measure support quality with real technical questions before signing; a generic call centre will not resolve Scope 3 materiality.
- Check the audit trail field by field: source, factor, version and owner. Without it, independent verification becomes a nightmare.
- The exit and data portability clause matters as much as price; have legal read it before commercial does.
Perguntas frequentes
Does the platform handle the methodology or does it just calculate?+
A good platform structures the calculation according to the chosen methodology (GHG Protocol Corporate Standard, ISO 14064-1 and so on) and keeps an audit trail. Methodological responsibility (boundary choice, materiality, category classification) stays with the company and its consultant; no platform replaces a specialist.
Is it worth consolidating platform and consulting with the same vendor?+
It depends on the model. If the consulting is genuinely integrated (not just cross-sold), it cuts friction, standardises data and speeds up delivery. If it is forced cross-sell, it costs more and gives less flexibility. Ask whether the consulting stands or falls with the platform; a good company runs both as sustainable products.
Can I build my own solution with Excel plus ChatGPT?+
For a small company with a simple inventory, yes, in the short term. But audit trail, factor updates, supplier integration, reports in required formats (XBRL for CSRD) and calculation versioning all become problems at scale. A platform pays for itself in 1-2 years for a company with a reasonably complex inventory.
How do I know the platform's emission factors are current?+
Ask how often the main databases are updated (DEFRA UK, MCTI, IPCC, ecoinvent), who curates them internally, and how users are told. A serious platform updates the main databases at least annually, with visible versioning.
Is an international SaaS platform worth it for a Brazilian company?+
It can be, but check: coverage of Brazilian factors (MCTI, ABNT NBR ISO 14064), Portuguese support, compliance with CVM Resolution 193 (IFRS S2), and LGPD. Several global platforms still have gaps in those areas; test deeply before signing.
- Lock-in
- Technical or contractual dependency that makes moving to another vendor hard. In carbon platforms it usually comes from a proprietary data format or a restrictive contract clause.
- Audit trail
- A complete record of source, factor, version and owner for every entry. A prerequisite for independent verification and for IFRS S2/CSRD compliance.
- Emission factor
- The coefficient that converts a unit of activity or spend into tCO₂e. Databases used: DEFRA UK, MCTI Brazil, ecoinvent, IPCC, CDP.
- XBRL
- eXtensible Business Reporting Language. The electronic tagging format required by CSRD for the sustainability report.
- Portability
- The ability to export all data in an open format in order to migrate to another platform, with no loss of history.
- Limited assurance
- The minimum level of independent verification. Equivalent to "nothing came to our attention to the contrary".
Frameworks mencionados neste artigo
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IFRS S1 & S2 Roadmap
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