I asked multiple AI: In Magento 2, what is the best class to use to implement an After Plugin when order is placed?

I found it interesting! I asked multiple AI models about what is the best way to implement an after plugin in Magento 2 that runs when order has been placed.

I got different answers, but very interesting. What do you think, please let me know what you would choose.

• Class A – Magento\Quote\Model\QuoteManagement
• Class B – Magento\Checkout\Model\PaymentInformationManagement

The best class to implement an after plugin for place order in Magento 2 depends on your specific use case, but here’s a comparison:

1. Magento\Checkout\Model\PaymentInformationManagement (Recommended for most cases)

✅ Best for:

• Intercepting the standard checkout flow (REST API, frontend checkout)
• Modifying behavior after payment & order placement
• Accessing payment and billing information

✅ When to use:

• If you need to execute logic after the order is placed but still within the checkout process
• If you’re working with the default Magento checkout (including GraphQL/REST API)

🔹 Example Use Cases:

• Sending custom order confirmation
• Logging order placement
• Triggering external integrations

🔹 Plugin Method:

public function afterSavePaymentInformationAndPlaceOrder(
    \Magento\Checkout\Model\PaymentInformationManagement $subject,
    $orderId,
    $cartId,
    \Magento\Quote\Api\Data\PaymentInterface $paymentMethod,
    \Magento\Quote\Api\Data\AddressInterface $billingAddress = null
) {
    // Your logic here
    return $orderId;
}

---

2. Magento\Quote\Model\QuoteManagement (More low-level control)

✅ Best for:

• Intercepting order creation at the quote-to-order conversion stage
• Modifying order data before it’s saved
• Customizing order placement behavior

✅ When to use:

• If you need to modify the order before it’s finalized
• If you’re dealing with custom checkout flows (not just the standard one)

🔹 Example Use Cases:

• Adding custom order attributes
• Modifying order totals before saving
• Implementing custom validation

🔹 Plugin Method:

public function afterSubmit(
    \Magento\Quote\Model\QuoteManagement $subject,
    $order,
    \Magento\Quote\Model\Quote $quote,
    $orderData = []
) {
    // Your logic here
    return $order;
}

---

Which One Should You Choose?

Final Recommendation

• Use PaymentInformationManagement if you need to run logic after the order is placed (e.g., sending notifications, logging).
• Use QuoteManagement if you need to modify the order before it’s saved (e.g., custom validation, adjusting totals).

For most cases, PaymentInformationManagement is the better choice because it ensures the order is already successfully placed before your plugin runs.