The deadline you cannot ignore
An owner hears from his gestoría that Verifactu must be in place before 1 January 2027. His ten-year-old till is not ready. One supplier promises a "connector", another charges extra, and the forums contradict each other on what the tax office will actually check. He just wants to run his restaurant, not become a tax expert.
Madbri is Verifactu-native, not Verifactu-compatible. The hash chain, an FNMT certificate, a retry queue and a ten-year audit archive are built in, not bolted on. One decision and you are ready for the deadline, while your gestoría receives clean data instead of a shoebox of receipts.