What is ACH?
ACH processes over 30 billion transactions and $80 trillion annually — payroll, bill pay, tax refunds, and most recurring payments in the US run on it. Here's how the batch processing system actually works, from ODFI to RDFI, SEC codes to return codes.
What is Open Banking?
Your bank holds your financial data — but open banking says it belongs to you. Here's how the APIs, consent frameworks, and data aggregators behind open banking actually work, and why the US is only now catching up to the UK and Europe.
What is RTP
ACH was built in 1972. Fedwire in 1918. RTP is the first new core payment infrastructure built in the US in over 40 years — and it settles in seconds, around the clock, with immediate finality. Here's how it works.
How Zelle Works
Zelle moved $800 billion in 2023 — more than Venmo and Cash App combined. It's free, it's instant, and it's irreversible. Here's how it actually works, why the money arrives in minutes, and why you can't get it back once it's gone.
How the Mastercard Network Works
Mastercard and Visa look identical to consumers. Under the hood they run separate networks, separate rules, and separate fee structures. Here's how Banknet works — and where Mastercard diverges from Visa
How the Visa Network Works
Visa doesn't issue cards, lend money, or approve transactions. It runs the highway that connects your bank to the merchant's bank — and processes 65,000 transactions per second doing it. Here's how VisaNet actually works
