The rail, the shop, the invoice

A foundation model for checkout, a kirana that did not become an app, and the compliance software nobody photographs.

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Payments
Razorpay named the model
Vulcan unifies routing and fraud. The merchants who care already live on failed pings.
Retail
After the kirana hype
UPI, WhatsApp, a notebook. That is the stack. Build for a wound, not a platform.
Ecommerce
Blinkit sets Eternal's tempo
The parent is a grocer with a restaurant attach. Say it.
SaaS
GST as monopoly SaaS
Q-commerce volume is an invoice event. Reconciliation still beats the chatbot.