Know the moment
you lose the Buy Box
BuyBoxSentry checks every SKU you sell, every day, and tells you the second a hijacker takes your Buy Box — or warns you before they do, when someone starts undercutting your price.
Connect your Amazon account →Free plan available · no credit card required
Catch hijackers immediately
An email the moment another seller's offer wins the Buy Box on one of your listings — not days later when you notice sales dropped.
A warning before it happens, too
Set your own undercut threshold — get warned the moment a competitor prices below it, even while you still hold the Buy Box.
Currently tracks FBA-fulfilled SKUs. Merchant-fulfilled-only listings are on the roadmap.
Connect your account
Standard Amazon OAuth login — we never see or store your password.
Set your undercut threshold
How much cheaper a competitor has to be before you want to know — that's it.
Get alerted the moment it changes
We only read your pricing and offer data — we never touch your listings or change your prices.
Free
up to 25 SKUs, checked daily
Growth
up to 500 SKUs, checked every 6 hours
Pro
unlimited SKUs, checked hourly
Cancel anytime.