40,000 tonnes of SAFc committed
Roughly 10% of all SAFc transactions to date.
Book & Claim SAFc, Backed by Real Fuel
Every certificate GSC sells is backed by a physical SAF batch that actually moved through a known refinery's mass-balance ledger — not paper attribution, not unbacked claims. Buy a certificate, retire it cleanly against your Scope 3, defend it in any audit.
Real, delivered SAF
Every certificate corresponds to a physical batch on a refinery's mass-balance ledger. We trace each tonne from feedstock to delivery before the certificate is issued.
ISCC EU + CORSIA-eligible
Sold against certification standards your auditor and CDP filing already recognise. No bespoke scheme, no methodology you have to defend internally.
Audited retirement
Each certificate retired on a registry of record with a public retirement ID. Cite it directly in disclosures, supplier responses, and CDP submissions.
Feedstock & CI disclosed
Per-batch carbon-intensity score (gCO2e/MJ), feedstock type, production pathway, and geography. No black boxes — the attributes your sustainability team needs are on the certificate.
Three Steps, Forty-Eight Hours
A typical SAFc transaction is fast. Most buyers go from first call to indicative quote within two business days.
Scope
Tell us your volume, vintage, retirement window, and any preference on CI score or feedstock. A 20-minute call is usually enough.
Quote
Indicative quote within 48 hours, drawn from live inventory across our refiner and producer network. Firm pricing on acceptance.
Retire
We deliver the certificate, retire it on the registry of record on your behalf, and send the retirement documentation for your reporting and audit file.
A Real Fuel Book, Not a Paper Marketplace
Most SAFc you can buy today comes from intermediaries with no physical fuel relationships and no view of the underlying batch. GSC is the other kind of seller.
The certificates come from fuel we move
The founding team has brokered 150,000 tonnes of physical SAF already — built on years of relationships with refiners, producers, and aviation fuel distributors. Every certificate we sell is sourced from that book, not paper.
We run the infrastructure that proves it
GSC operates the Global SAF Stack — a mass-balance engine and book & claim registry built and self-hosted in-house. Audit-ready chain-of-custody from feedstock to retirement.
Scope 3 Is Tightening Faster Than Supply
CSRD reporting expectations, SBTi target-setting, and CDP disclosure scoring now all reward credible aviation emissions accounting. For most disclosing companies, business travel and freight are the hardest line items to address — and SAFc is the only book & claim mechanism that maps cleanly onto them.
The market is moving from voluntary to expected inside 24 months. Available SAFc inventory is finite and concentrates in a small number of vintages. Buyers who scope and lock volumes early get the CI scores and prices they want. Buyers who wait take what's left.
Lock the vintage. Retire on schedule. Disclose with evidence.
Book a 20-Minute Call
Tell us what you need to retire and when. We'll come back with an indicative quote inside two business days.
Headquartered in Singapore