About Buy Box Checker

Buy Box Checker is ZIP code-level Amazon Buy Box monitoring. It shows sellers, vendors, and agencies exactly where they are winning and losing the Buy Box across the country, and alerts them the moment it changes.

The Problem We Solve

Amazon picks the Buy Box winner by delivery location, so the seller who owns the Featured Offer in Seattle can be losing it in Miami at the exact same moment. Seller Central reports only one blended, nationwide Buy Box percentage. That single number hides regional losses and suppression completely, which costs sellers sales and wastes ad spend on listings they cannot actually sell from in those regions.

What Makes Us Different

Most tools check one national result. Buy Box Checker checks each ASIN across the specific ZIP codes you choose, tracks ownership over time, and tells you the instant something changes.

By ZIP code

Monitor Buy Box ownership in the exact locations your customers order from.

Instant alerts

Get notified by email, Slack, Teams, or webhook the moment you lose the box.

See suppression

Catch regional suppression and loss that a national percentage hides.

Built by the Team at Ad Badger

Buy Box Checker is made by the team at Ad Badger, a company focused on helping Amazon sellers win. Ad Badger has spent years building Amazon advertising software and working hands-on with sellers on PPC. We built Buy Box Checker to close a blind spot that pricing tools and PPC dashboards leave wide open: knowing, region by region, whether you actually own the Buy Box your ads are driving traffic to.

The guides on this blog are written by Michael Erickson Facchin, founder of Ad Badger and Search Scientists, drawing on years of hands-on work helping Amazon sellers grow their advertising and win the Buy Box. Connect with Michael on LinkedIn.

See Where You Are Losing the Buy Box

Track up to 5,000 ASINs across the ZIP codes that matter to you. Free plan available, no credit card required to start.

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Learn More About the Amazon Buy Box

In-depth guides from the team behind Buy Box Checker.

June 11, 2026

Amazon Buy Box Algorithm, Explained (2026 Guide)

How Amazon's Buy Box algorithm actually picks a winner in 2026: the risk-based factors it weighs, why winners change by ZIP code, and how to read its signals.

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April 9, 2026

What Is the Amazon Buy Box? (2026 Guide for Sellers)

Learn what the Amazon Buy Box is, how to become eligible, and how top sellers win it in 2026. Our data: 72.6% of multi-location ASINs split the Buy Box by location.

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August 5, 2026

Amazon Stock Levels: 1 in 4 Checks Shows a Stock Warning

We analyzed 598,231 Amazon Buy Box checks. 26.2% returned a low-stock or out-of-stock warning, and 75.9% of stockouts hit some locations but not others.

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