Guides and methodology

How Cartroute compares prices, what shipping does to the ranking, and how far to trust a coupon code, measured across the whole catalog.

The effective-price method: listed price plus shipping minus the best coupon anyone can use, restricted to fresh, in-stock offers.

Measured across the full Cartroute catalog: how often the lowest sticker price is not the lowest landed price.

Redemption success rates for every coupon Cartroute tracks, by source type, and why automatic promotions beat typed codes.