Shopify keeps a single cost per item with no history — so when a supplier quietly bumps a price, your profit reports keep looking fine while your real margin bleeds. CostSentry watches your supplier price lists and flags every increase, the exact per-SKU damage, and the new price to hold your margin.
Most stores update cost per item only now and then — if at all. Between updates, every margin, every profit report, every “which products actually make money” decision is running on a stale number.
And Shopify stores only one cost per variant: no history, no per-supplier trail. Update it and you lose what you paid before.
You feed CostSentry your suppliers' price lists. It does the watching, the math, and the warning.
Upload each supplier's price list (CSV/Excel) or drop in a fresh one anytime. CostSentry matches it to your Shopify catalog by SKU.
When a new list lands, it diffs against the last one and catches every price rise, drop, and discontinued item — automatically.
For each affected SKU it shows the exact margin hit at your current retail, and which products just fell below your target margin — or into a loss.
An email & Telegram digest with the new price you'd need to hold your margin. Update Shopify's cost in a click, keep a full price history.
If you buy wholesale and resell — not dropship, not handmade — supplier price changes are your quietest margin leak. The more SKUs and suppliers you carry, the harder it is to catch by hand.
CostSentry is supplier-side, not the usual:
Export your Shopify products, drop in a supplier price list, and see in seconds which SKUs a price increase just pushed below your margin. It's the same engine that powers CostSentry.
Open the Supplier Price Margin Checker →CostSentry is opening to a first group of Shopify stores. Leave your email and we'll reach out when your spot is ready — plus early-bird pricing.