Build vs Buy — Payment Processors

What this means for Payment Processors

• Interchange and scheme fees are the single largest cost of revenue, and the data infrastructure to actually optimize routing, level-3 data, surcharging, and downgrade prevention lags what the largest processors have built — money is leaking through misclassified transactions every day.
• Real-time fraud and authorization decisions have to happen in under 100ms with continuously rising attack sophistication — the rules-based engine the processor built five years ago is being eaten alive by ML-driven fraud, and the in-house data science team is small.
• Regulatory load is heavy and growing — PCI DSS 4.0, Reg E, Reg Z, Nacha rules, state money transmitter licenses, EU PSD2/PSD3, FedNow and RTP rails — and the compliance team is trying to operate as a function, not as a platform.

Where it pays to act

• AI-driven authorization optimization — real-time models that route transactions, retry intelligently, and recover the 4-7% of revenue that gets lost to soft declines and downgrades.
• ML fraud and risk decisioning — modern gradient-boosted and graph-based fraud models, behavioral biometrics, and consortium-data signals that outperform rules engines on both fraud capture and false-positive rates.