An Odoo payment gateway is a built-in or integrated system that lets businesses accept online payments—credit cards, debit cards, digital wallets, and bank transfers—directly through their Odoo eCommerce, Sales, or Invoicing modules. It acts as a secure bridge between your Odoo store and the payment processor (like Stripe, PayPal, or Razorpay), handling transaction authorization, encryption, and settlement.

Here's how it works: when a customer checks out, Odoo redirects payment details to the gateway, which verifies funds with the bank, processes the transaction securely, and sends a confirmation back to Odoo. The order status updates automatically, invoices generate, and payment records sync into your accounting—no manual entry needed.