Many shoppers default to Amazon but don't always find the best deals or quality. A browser extension could analyze prices, suggest alternatives, and flag overpriced items.
Build a lightweight extension that scans Amazon product pages and compares prices with other retailers or highlights better-reviewed alternatives.
Shoppers pay for premium features like price-drop alerts or historical pricing data. Amazon affiliates could also drive revenue.
Start with a simple price comparison tool for a few popular categories. The biggest risk is Amazon blocking or replicating the functionality.