The verdict
For a small Dutch or Belgian business that wants clean invoices, bank matching and a prepared VAT return with little fuss, pick Moneybird. If you run an agency or consultancy and your real problem is knowing whether a project makes money and who has capacity next week, pick Productive.
Many services firms end up wanting both. Productive handles the work and the invoices that come out of it. An accounting tool handles the ledger and VAT. The vendor presents Productive as something that connects to accounting tools such as QuickBooks and Xero, and it lists Exact Online and Twinfield too. Check that your accounting tool is on that list before you commit.