Show HN: I built remembered checkout for Voice calls

Ringup, a new service for voice agents, lets callers pay and be recognized by phone number alone, charging saved cards in seconds without reading digits aloud. The system integrates with 144+ payment processors and settles directly on the merchant's existing account, aiming to eliminate friction for regulars and reduce no-shows.

Identity and payments for voice agents. Ringup helps voice agents recognize callers by phone number alone, so they can greet them, remember their usuals, and charge their saved card in seconds. Payments settle directly on the merchant's existing processor. Drops into your existing agent, live in an afternoon 01 — The problem Your agent still doesn't know who's calling. Voice AI books the table, takes the order, files the claim. But every call starts from zero: the regular gets treated like a first-timer, reading out a 16-digit card number every time a payment comes up. The agent takes the order instantly, but the caller is a stranger: no name, no saved card. They still drive over and stand at the register to pay, adding lines for diners and work for staff. The agent greets the regular by name, confirms the usual, and charges their saved card on the call. The order is prepaid, labeled, and ready at pickup. Deposits and no-show fees mean asking every guest to read a card to a bot, so most agents skip them and no-shows eat the night. Recognized guests confirm the deposit in one sentence: “your Visa ending 5858?” First-timers tap a texted link. No digits spoken, every booking backed. Identity by interrogation: name, date of birth, account number, then a card keyed digit-by-digit into the keypad, on every single call. The phone number is the identity: carrier-verified, matched to the account, and the balance settled from a saved card in one sentence. The hardest call in the book gets harder at the finish: the payer must dig out a card and read 16 digits before a promise-to-pay becomes money. The moment they agree, it's done. The saved card is charged on the call, or a one-tap link lands by text while they're still on the line. Every ticket opens with an interrogation “name, email, order number?” before the actual problem is even on the table. identify returns who's calling before the first hello. Your agent opens with their history in hand, and if something's owed, it's one sentence to settle. The counter quotes the part and holds it unpaid. Half the holds never show, and chasing cards by callback burns the counter's day. Regulars are recognized on the first ring. The part is held and paid in the same breath, charged to the card on file. 02 — How it works Phone as the payment identity The first time someone pays, they're saved, keyed to the number they call from. Every call after, they're recognized instantly. Either way, paying takes seconds and never leaves the conversation. Pay in one tap. Saved for next time. A link arrives by text While they're still on the call, a secure pay link lands in their messages. No app to download, no portal to log into. They pay, their way One tap with a digital wallet, or add a card or bank account, saved with their consent, nothing read aloud, nothing typed. Done before they hang up The payment confirms on the call, and they're recognized instantly the next time they ring. Recognized by number. Paid by voice. We already know them The moment they call, Ringup returns their name, saved card, and any context you've attached. Your agent greets them by name, not a form. They just say yes "Charge your card on file for $24?" "Yep." That spoken yes is the entire checkout. Paid in seconds The charge clears mid-conversation and the confirmation is read right back to them. 03 — Why Ringup One integration. Every processor your merchants run /integrations/payment-providers/ . Your merchants don’t all use the same processor, and you shouldn’t care. The same API charges whichever one each merchant already has. Other solution Internet wallets Made for the web, not the call Our solution Ringup Built for the phone call 04 — Payment providers 144+ payment providers, connected. Every charge settles on the merchant's own account: their rates, their dashboard, their merchant of record. No reconciliation issues, no new processor account creation, no parallel disputes and chargeback flows, no headaches. See all 144+ payment providers → /integrations/payment-providers/ 05 — Voice platforms Every voice platform. Or your own stack. Hosted call transfer drops into the platforms your agents already run on, and the REST API covers everything else: recognize the caller, create the checkout, transfer the call. 06 — FAQ Questions, answered. What is Ringup? How is Ringup different from Stripe Link and other wallets? Why Ringup why section above. How does a customer pay during a call? Is your solution 2FA-compliant for payments? possession of the line the call comes from the number itself and its carrier-verified integrity checks that the SIM hasn't been swapped and the line hasn't just been ported or forwarded . The biggest weakness of SMS two-factor is the SIM-swap: moving a number to a new SIM so the codes follow. Ringup detects exactly that, and there's no one-time code to phish. You get every assurance of 2FA, plus a defense against the attack that usually beats it. Do you store card numbers? Is it PCI-compliant? Where does the money go? Do you hold our funds? How do we add Ringup to our agent? 07 — Request a demo Ready to get started? Tell us what you're building and we'll get you a key. We're onboarding a handful of voice-AI teams now.