Sixteen instant-payment systems, one card each: who runs it, how you address a payment, and the one detail professionals actually need to know. The full mechanics are in the instant-payments chapter.
THE PATTERNS
Sixteen systems, four lessons.
1
The alias is the adoption engine. Every runaway success lets you pay a phone number or QR, not an account number. Systems that kept bank-account addressing (looking at you, US) stayed niche.
2
Who operates it predicts how it grows. Central-bank-run (Pix, SPEI) and public-utility-run (UPI, NIP) systems mandate participation and price low. Bank-consortium rails (Swish, Bizum, Zelle) grow only as fast as the banks' incentives allow.
3
Emerging markets lead, rich markets lag. The less legacy card infrastructure a country had, the faster instant rails won. The leapfrog is the story of payments in this decade.
4
The next chapter is links, not launches. UPI–PayNow, Nexus, Pix corridors: nearly every system below is negotiating connections to the others. The atlas is becoming a network.