ZerraLedger is infrastructure — a SAF certificate reconciliation data layer that sits beneath the tools your customers already use. Three platform categories need this today.
As Scope 3 Category 6 reporting mandates tighten globally, corporate travel platforms face a specific problem: their clients need SAF certificate data at the trip level, reconciled against CORSIA and national scheme obligations, and auditable for ESG disclosures.
ZerraLedger provides the certificate data layer — so a CTM or Navan engineer can call one endpoint per booking and receive verified SAF coverage data, rather than building bespoke connections to five government registries across three continents.
Carbon accounting platforms are increasingly required to substantiate Scope 3 Category 6 (business travel) emissions reductions with verified SAF certificate data — not estimates. The market is moving from "we bought SAF" to "here's the certificate, the fuel pathway, the registry reference, and the CORSIA eligibility status."
ZerraLedger provides the certificate verification and cross-scheme reconciliation layer that platforms like Watershed and Persefoni need to power audit-grade client reports — without building registry connections themselves.
Enterprise resource planning systems are building out green ledger and ESG reporting modules under pressure from ISSB S2 and CSRD compliance timelines. Aviation is a significant line item for any enterprise with substantial travel spend — and SAF certificate data is the missing piece for audit-grade Scope 3 reporting.
ZerraLedger provides a clean REST API that ERP sustainability modules can call directly — structured JSON that maps cleanly into green ledger schemas, with full provenance metadata for assurance processes.
Early access
We're working directly with travel and carbon accounting platforms to shape the API around real integration requirements.
Get in touch