Private operator training

Learn the books.
Keep your judgment.

A formation-first accounting practicum built around Tantamount UG and Leviathan—without touching one euro of real company data.

Authored rules
with primary sources

Persistent synthetic
company simulation

Deterministic gates
AI never passes you

Tantamount Ledger · Educational sandbox only

Restricted file

Open the ledger

One shared password. Your session stays signed in for 30 days on this device.

No production records. Never enter real invoices, bank data, tax identifiers, or customer information here.