How do I integrate Alpha Bank Pay, Piraeus, NBG, and Eurobank in Magento?

Greek bank gateways dominate, Greek shoppers trust their bank’s gateway and Greek banks settle in EUR with no FX. Stripe / PayPal are accepted but lose conversion vs Greek banks for €50+ baskets. Recommended Magento 2 stack:

• Alpha Bank Pay (Alpha e-Commerce), Alpha Bank’s gateway. Hosted-redirect or iframe integration. Magento module exists; we wire it for 3-D Secure 2.0 + tokenisation.
• Piraeus paycenter, Piraeus Bank’s gateway, popular with mid-market. HTTPS POST + MAC-signed response. We build a custom Magento payment method or use a 3rd-party module.
• Ethniki (NBG) winbank, National Bank of Greece gateway. Similar redirect / iframe flow.
• Eurobank ePOS, Eurobank’s gateway. Token + recurring supported.
• IRIS Online Payments, Greek inter-bank instant-payment scheme (DIAS). Increasingly popular for €1, €500 baskets.
• Klarna + Stripe, BNPL + international cards. Stripe FR-region works for EUR but has no native Greek bank routing.

We benchmark MDR rates + chargeback flows + 3-D Secure UX, pick 2-3 to wire side by side, and run an Alpha Bank test cart from staging.