Petra is business software for companies and sole traders in Serbia that works from documents that already exist: e-invoices from the national SEF system, statements from every bank, fiscal receipts from any cash register and tax obligations from the ePorezi portal. Invoices and e-delivery notes are issued with one click and sent to SEF and the e-delivery registry. Every incoming payment is matched to its invoice automatically, partial payments included, so you always know who owes you and how much. Stock is updated from every invoice and receipt, landed costs are calculated from the supplier invoice, and the profit and loss statement and profit by customer, product and location are built month by month. For flat-rate sole traders, Petra keeps the statutory revenue book and tracks the 6 and 8 million dinar thresholds. Onboarding runs through a Chrome extension: one sign-in with the electronic ID instead of twenty manual steps. It works alongside the accounting software and accountant a business already has. 30-day free trial, no card and no contract.
