ChatGPT SearchOct 6, 2026
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Data as of Oct 15, 2026A topic in Carbon Accounting and Offset Verification.
Reviewed by Dimitry Apollonsky
Mentioned in · Jul 5 – Oct 15, 2026
ChatGPT SearchOct 6, 2026
Yes. If your requirement is “an external auditor gets their own read-only login and can trace an emissions number all the way back to the source invoice/document”, the strongest documented match I found is Gravity.
Gravity explicitly says auditors receive view-only access across the platform, including the full audit log and a calculation drill-down for each figure showing:
emissions figure → source document → unit conversions → emission factor → constituent gases
That is very close to the verification model you described.
So, for example, an auditor could theoretically sample a reported Scope 3 number and work backwards to the underlying invoice/source document rather than asking your team to assemble evidence manually.
| Platform | External auditor read-only | Source/evidence traceability | My take |
|---|---|---|---|
| Gravity | ✅ Explicitly documented | ✅ Source document → calculation → factor | Best match |
| Cozero | ✅ Explicitly documented | ✅ Methodology + audit trail; evidence access | Strong enterprise option |
| EcoOnline | ✅ Explicitly documented | ✅ Data, assumptions, calculations + source information | Strong established vendor |
| Salesforce Net Zero Cloud | ✅ Dedicated Auditor role | ⚠️ Can verify original values and underlying energy records; invoice-level lineage is less explicit | Strong if you're already on Salesforce |
| CARBONORMA | ✅ Read-only auditor portal | ✅ Source, factor, version, formula | Very aligned technically, but appears more niche |
| Carbonly.ai | ✅ Dedicated read-only auditor workspace | ✅ Explicitly says ledger row → source document | Interesting, but I'd validate maturity |
Cozero specifically advertises secure read-only access for external auditors/verifiers and an immutable audit trail. www.cozero.io EcoOnline likewise describes a detailed audit trail covering data, assumptions and calculations, with source information and read-only auditor access.
Salesforce is particularly well documented on the permissions side: its Net Zero Cloud Auditor role is read-only, and Salesforce says external auditors can view original values used in calculations and the related energy-use records. It also supports uploading utility bills and checking recorded energy consumption against those bills.
Don't accept “audit trail” as sufficient. Ask each vendor to demonstrate this exact workflow live:
Pick one reported tonne of CO₂e → identify the underlying transaction → open the original invoice → show the extracted activity/spend value → show the emission factor and version → show the calculation → show who approved/changed it → demonstrate that the auditor cannot edit anything.
The critical distinction is audit-ready reporting vs. evidence lineage. A PDF/export saying “this number came from invoices” isn't the same as an auditor independently navigating from the reported figure back to the actual source document.
If this is for selecting a platform, I'd shortlist Gravity, Cozero, and EcoOnline first, with Salesforce Net Zero Cloud if you're already heavily invested in Salesforce. Gravity has the clearest public documentation matching both halves of your requirement: read-only auditor access + calculation drill-down to the source document.
Gravity's auditor/verification documentation
Cozero's third-party audit access documentation
Salesforce Net Zero Cloud audit documentation
If you tell me whether you're doing CSRD/ESRS, SEC climate disclosure, California SB 253, or voluntary GHG Protocol reporting, I can narrow this to the 2–3 platforms I'd actually put through procurement.
Google AI ModeSep 23, 2026
Verifying carbon data involves establishing a seamless audit trail —connecting high-level greenhouse gas (GHG) output numbers directly back to primary evidence like utility bills, supplier spend data, or source PDFs.[](https://www.our-trace.com/carbon-accounting-platform)[[2](https://carbonance.com/en/ccas/carbon-ledger-audit-trail)](https://carbonance.com/en/ccas/carbon-ledger-audit-trail/)
Most modern, enterprise-grade carbon accounting platforms address this by supporting granular, role-based access control (RBAC) that lets you provision read-only/auditor seats.[](https://www.neo.eco/audit-trail)[[2](https://.com/en/ccas/carbon-ledger-audit-trail)]()
ChatGPT SearchOct 15, 2026
Several carbon accounting platforms explicitly offer read-only access for external auditors, allowing them to inspect emissions data, trace calculations to source documents, and review audit trails without modifying your records.
Based on the vendors’ published feature descriptions, these are the strongest matches for your requirements.
(Strong match)
Gravity says auditors receive view-only access, with calculation drill-downs showing the source document, unit conversions, emissions factor, and constituent gases. It also provides an audit log, helping external verifiers independently trace individual figures back to their evidence.
Best for: auditors who need to verify individual emissions calculations against underlying evidence.
We need a carbon accounting tool that lets our external auditors view data in read-only mode so they can check it against our original invoices. Which platforms offer this?
Enterprise platforms that explicitly support external auditor or third-party verifier read-only access—linking metrics straight back to source invoices and document attachments—include:
If you'd like, let me know:
I can help narrow down which platform fits your tech stack best.
ATLAS Carbon explicitly advertises a dedicated, read-only auditor login. Its audit trail records the factors and sources used in calculations, and data can be locked at key stages of audit preparation to prevent changes.
Best for: organizations that want controlled auditor access and locked reporting data.
Salesforce documents an external-auditor role that provides read-only access to carbon footprint data. Auditors can also export carbon calculations and inspect the original values used for emissions calculations across several inventory and footprint records.
Best for: larger organizations that need structured carbon inventories and formal audit workflows.
EcoOnline advertises a detailed audit trail covering data, assumptions, calculations, and source information, alongside read-only access for auditors.
Best for: teams seeking carbon reporting with documented evidence and auditor review access.
Cozero advertises secure, read-only access for external auditors and verifiers, with access to emissions data, calculation methodology, and audit trails for third-party review.
Best for: organizations seeking emissions reporting and external assurance in a shared data environment.
| Platform | Read-only auditor access | Source-document traceability | Audit trail |
|---|---|---|---|
| Gravity | Yes | Explicitly documented | Yes |
| CLEAResult ATLAS Carbon | Dedicated login | Sources behind calculations | Yes |
| Salesforce Net Zero Cloud | Auditor profile | Original calculation values; confirm document-level access | Yes |
| EcoOnline | Yes | Source information documented | Yes |
| Cozero | Yes | Access to data and methodology; confirm document-level links | Yes |
Ask each vendor to demonstrate these five capabilities in a live product demo:
My recommendation: Start with Gravity and CLEAResult ATLAS Carbon. Both explicitly describe auditor-specific read-only access and auditability features. Salesforce Net Zero Cloud is also worth evaluating if you need a more enterprise-oriented carbon accounting system.
One important distinction: an audit trail that records where data came from is not necessarily the same as an interface that lets an auditor open the original source file. Confirm that exact workflow before purchasing.
Several enterprise carbon accounting and ESG platforms explicitly feature customizable role-based access control (RBAC) with dedicated read-only auditor roles or comprehensive audit trails designed for third-party verification.[](https://www.ceeogreen.com/en)[[2](https://www.ecoonline.com/esg-software/carbon-accounting)](https://www.ecoonline.com/esg-software/carbon-accounting/)
Platforms offering dedicated auditor views or read-only traceability include:
If you have a specific software vendor in mind (like Watershed, Persefoni, or Sweep) or require a platform that integrates with specific financial systems, let me know so I can verify their exact permission tier names for external users.
