Extensions & companion tools

A browser extension that compares prices across participating retailers and looks for available coupon codes at checkout.

• Adds a browser toolbar tool that checks participating retailers for lower listed prices while you shop.
• Searches its database for coupon codes that may apply to your cart at checkout.
• Free to install and use. A Capital One card is not required.

Availability, supported retailers and coupon results vary. Any price comparison or coupon result depends on the retailer and is not guaranteed.

Shows historical price charts on supported store pages so you can see whether a current listing is unusual for that product.

• Displays a price chart directly on product pages for supported retailers.
• Optional alerts when a tracked product reaches a price you set.
• Useful for hardware purchases where prices fluctuate week to week.

Coverage depends on the retailer. Historical data may be incomplete for newly listed products.

Compares listed prices for PC game keys across storefronts and flags the store type so you can judge the source.

• Compares current listings across participating PC storefronts.
• Labels official stores and third-party marketplaces separately.
• Includes regional restriction warnings where the store publishes them.

Always confirm the store, region lock and refund policy before purchasing a key from a marketplace listing.