Platform

GSC SAF Stack

End-to-end infrastructure, not a product. Designed and led by Uros Perisic, built by his firm Thalassis Consulting — Goldman Sachs rigour applied to commodity-grade compliance systems. Self-hosted. White-label ready. Production-hardened.

01 — Capabilities

Three Layers, One Stack

Mass balance, Book & Claim, and marketplace — each layer built to production standard, each serving a distinct function in the SAF supply chain. Infrastructure first, marketplace second.

I

Mass Balance Engine

Hardened chain-of-custody tracking across blended supply chains.

Certified SAF quantities match claims at every node. The engine enforces zero double-counting — not as a design goal but as a system constraint. Every batch, every blend, every transfer is cryptographically tracked from production to claim.

Built for operators who need to prove compliance to regulators, not just report it to stakeholders. ISCC EU chain-of-custody requirements are embedded in the accounting logic.

II

Book & Claim Registry

Environmental attributes traded independently of physical molecules.

Decouples the environmental value of SAF from the physical delivery point. Buyers can claim Scope 3 reductions without requiring physical uplift at a specific airport. Every transfer is auditable, every claim traceable to a certified production batch.

Designed for airlines meeting blending mandates at scale, corporate buyers targeting Scope 3 across fragmented travel patterns, and regulators who need a verifiable chain from production to claim.

III

Marketplace

A state-backed petroleum company already operates across the full stack — mass balance, Book & Claim, and marketplace.

White-label-ready for any partner or national body that needs marketplace infrastructure. Not a directory of listings — a transactional layer built on top of the mass balance and Book & Claim infrastructure underneath.

A marketplace without compliance infrastructure underneath is a brochure. The GSC SAF Stack is infrastructure first, marketplace second. The opportunity is open for national energy companies, fuel suppliers, and aviation authorities.

02 — Architecture

Self-Hosted. By Design.

Most competing platforms are externally hosted — transaction data, certification records, and compliance audit trails sit outside the operator's jurisdiction with no local oversight.

Data Sovereignty

The GSC SAF Stack keeps data where it belongs — under the operator's jurisdiction. Relevant for government bodies, national energy agencies, and any organisation with cybersecurity mandates.

Supply-Chain Cybersecurity

Self-hosting eliminates third-party hosting dependencies from the compliance chain. Audit trails, certification records, and transaction data remain within a controlled perimeter.

03 — White-Label

Your Platform, Your Revenue

GSC's brokerage and trading clients access the SAF Stack as part of the commercial relationship — integrated infrastructure, not a separate software purchase. For organisations that want their own independent deployment, the full stack is white-label ready. Deploy under your brand, within your own infrastructure, generating revenue from your own market.

National Bodies

Aviation authorities and national energy agencies can deploy SAF marketplace infrastructure without building from scratch — mass balance, Book & Claim, and marketplace under sovereign control.

Energy Companies

State-backed petroleum companies and fuel suppliers can operate SAF trading and compliance under their own brand. One already does — across all three modules.

Fuel Suppliers

Into-plane service providers and distributors can integrate mass balance tracking and marketplace functionality directly into their operations — and their revenue model.