Amazon's secret to selling more (and how to use it in your store)

Amazon's secret to selling more isn't its catalog or its prices: it's recommendations. Public estimates credit roughly a third of its sales to the system that suggests complementary products and higher-end versions at just the right moment. That's cross-selling and up-selling at scale, and the good news is that the same mechanics work in any online store, with no engineering team and no millions in investment.

Ever wonder why you always end up adding more products to your cart on Amazon than you planned to? It's no accident: it's a system built to turn every click into a sales opportunity. Below, we break it down and show you how to replicate it in your own store.

What is Amazon's secret to selling more?

The secret is easy to name and hard to pull off by hand: show every customer the right product at the right moment. Lines like "customers who bought this also bought…" or "upgrade your purchase with this version" don't show up at random. They're contextual recommendations that read what the person is looking at, what's already in their cart, and what tends to get bought together, and they surface it without interrupting the purchase.

The key is that Amazon doesn't try to sell more by pushing, but by helping people decide. When the suggestion is relevant, it lifts your average order value (AOV) and improves the experience at the same time. That balance—selling more without being annoying—is what makes it work.

Cross-selling and up-selling: the mechanics behind it

Behind Amazon's system are two strategies worth telling apart:

• Cross-selling: offering products that complement the one the customer is about to buy. If someone's grabbing a phone, suggest a case or wireless earbuds.
• Up-selling: offering a higher-end version of the same product. If they're looking at a 256 GB laptop, show them the 512 GB one.

Both go after the same thing—getting the customer to spend a little more without feeling pressured—and both raise your e-commerce's AOV. If you want to dig into how they differ and when to use each, we cover it in cross-selling vs. up-selling: the definitive guide.

How to replicate Amazon's system in your store

You don't need Amazon's infrastructure to apply the same logic. You need recommendations that are relevant, shown at the right moment, and measurable. In practice, it's four steps:

1. Suggest at the moments of highest intent. The buying journey has several points where a recommendation adds value: the product page, the "add to cart" click, checkout, and the thank-you page. We walk through the 6 conversion moments of an e-commerce store one by one.
2. Recommend based on real affinity, not at random. Look at what gets bought together in your own orders and use those pairs as your baseline. It's the same thing Amazon does, but with your data.
3. Blend it into your store's design. Adjust the copy, colors, and style so the suggestion feels like part of the store and not a banner slapped on top.
4. Measure and optimize. Track which recommendations convert and how much extra revenue they generate, and keep the ones that pay off.

Doing this by hand across a large catalog isn't viable: there are far too many combinations to keep up to date. That's exactly what SalesPilot automates, the AI engine that powers CrossUp: it learns from your catalog and your orders which products go together and builds the recommendation for every visit, without you having to set up rules one by one.

Do you have to be Amazon to pull it off?

No. Amazon's edge was scale and technology; today that technology is available to any store. More than 1,000 stores use CrossUp to apply these mechanics, and across the ones we measure, average order value rises +9.2% on average. In select cases we've measured +38%, +51%, and +27% in extra revenue (results vary by store, catalog, traffic, and setup).

Here's what matters: all that growth comes from the traffic you already had. It's not about attracting more visits—it's about selling better to the ones already arriving.

In short

Amazon's secret to selling more is cross-selling and up-selling recommendations shown at just the right moment. The mechanics are replicable in any store: suggest at the moments of highest intent, recommend based on real affinity, blend it into your design, and measure the results. The question isn't whether you should apply these tactics, but when you'll start: every cart that leaves incomplete is revenue that was already within your reach.