Coupon Shield – Detect coupon extension usage in eCommerce

Summary: Coupon Shield is an open source library that enables merchants to detect if shoppers use coupon extensions such as Honey, Klarna, Capital One Shopping, or Rakuten during checkout.

What it does

It identifies the presence of coupon extensions applied by shoppers on eCommerce sites to monitor discount usage.

Who it's for

Merchants and eCommerce platforms seeking to track coupon extension activity among shoppers.

Why it matters

It helps merchants understand and manage the impact of third-party coupon tools on their sales and promotions.