Sovereign Accounting.

Own your financial data. OSL is a high-performance, C++ double-entry ledger engine built for Australian businesses that value integrity and sovereignty.

Dogfooding in Action

We don't just build it; we rely on it. OSL powers the accounts for our own security and technical service operations right here on our NAS.

Incorruptible

Every transaction is SHA-256 hashed and chained. The ledger is a digital vault; if one cent changes, the seal breaks.

Sovereign

Self-hosted. Your data never leaves your control. No cloud lock-in, no subscription bloat, no harvesting.

C++ Core

High-performance engine using fixed-point math for absolute precision across global currencies and complex tax plugins.