About Octopus
The Belgian accounting backbone for SMEs and their fiduciary.
Octopus is a 100% Belgian, cloud-based accounting and invoicing platform built by Inaras, founded in 2002. It is used by more than 2,600 Belgian accountants and over 90,000 client files, with a single shared workspace between the SME owner and the external accountant. Sales and purchase invoices, financial transactions and miscellaneous entries land in the standard Belgian journals (verkoopdagboek, aankoopdagboek, financieel, diversen), with VAT codes wired in for the periodic BTW-aangifte and the annual listings.
The platform is built around a real Belgian general ledger, a CODA bank flow and a certified Peppol Access Point for e-invoicing. Octopus also exposes an open REST API, which is what makes the underlying invoice, customer, supplier and VAT-line data reachable outside the bookkeeping screen. In a warehouse, that turns Octopus from a closing tool into the single tidiest source of revenue, spend and tax-code data for every Belgian SME on the platform.