Sync apps fail silently — a missed webhook, an expired token, a broken listing link — and Etsy, Amazon, eBay or Faire keep selling stock you don't have. ShelfVitals is the independent audit: it reads both sides, compares them, and alerts you the moment they drift.
Get early access →| SKU | CHANNEL | SHOPIFY | MARKETPLACE | STATUS |
|---|---|---|---|---|
| CANDLE-AMBER-8OZ | Etsy | 14 | 14 | ✓ in sync |
| MUG-SPECKLE-12OZ | eBay | 0 | 4 | ⚠ OVERSELL RISK |
| TOTE-CANVAS-LG | Faire | 22 | 3 | ⚠ UNDERSELLING |
| PRINT-BOTANIC-A3 | Amazon | 31 | 31 | ✓ in sync |
| SOAP-CEDAR-BAR | Amazon | 48 | — | ⚠ LISTING SUPPRESSED |
of stock you don't have, live for sale right now — plus a suppressed Amazon listing quietly earning zero. Your sync app won't send this table. We will, the moment any row turns red.
“App lists items that have been sold out causing oversells. App also doesn't have the right quantity for items.”
SHOPIFY MERCHANT — EBAY INTEGRATION REVIEW“We are experiencing a critical issue… where inventory sync is failing.”
SHOPIFY MERCHANT — MARKETPLACE CONNECT REVIEW“Our prices were replaced… it really is unfit for purpose.”
SHOPIFY MERCHANT — MARKETPLACE CONNECT REVIEWThe pattern in hundreds of reviews: the sync didn't just break — it broke silently, and the merchant found out from an angry buyer, a marketplace defect strike, or a refund they had to eat. The sync app rarely raises the alarm, because the alarm indicts the sync app.
Read-only by design: no write permissions anywhere, nothing changed on your store or your marketplaces, no buyer data stored. Works alongside whatever sync setup you already run.
Link your Shopify store and the marketplaces you sell on — Faire and Amazon first, Etsy and eBay next. Read-only access, minutes to set up.
ShelfVitals continuously compares marketplace listings against your live Shopify inventory: quantities, prices, listing status, and whether marketplace orders actually arrived in Shopify.
The moment a SKU drifts, a listing dies or gets suppressed, or an order fails to import — you get a plain-English alert with the exact SKUs and the exposure, before a buyer finds it for you.
Marketplace Connect, CedCommerce, LitCommerce, Trunk — they push inventory around, and when they silently fail, their dashboards still say connected.
Etsy, Amazon, eBay and Faire don't know your real stock — they trust whatever the sync last told them, and they'll happily sell what you don't have.
The independent layer that reads your actual Shopify inventory and every marketplace listing, and refuses to take anyone's word for it.
Not a replacement for your sync. The smoke detector for it.
One oversell costs you the refund, the marketplace defect strike, and sometimes the buyer forever. ShelfVitals costs less than any of the three.
No — it audits it. ShelfVitals never writes to your store or your marketplaces. It reads both sides, compares them, and tells you when they disagree. It works alongside Marketplace Connect, CedCommerce, LitCommerce, Trunk, or any setup — including manual syncing.
Silently: a missed webhook, an expired token, a listing edit that breaks the link, a sync queue that stalls. The marketplace keeps selling against stale numbers, and the sync app's dashboard still says connected. Reporting its own failure indicts its own product — which is why the audit has to be independent.
No. It's architecturally read-only — no write permissions requested anywhere, and no buyer personal data stored, ever.
Faire and Amazon first (including Amazon suppressed-listing detection), then Etsy, eBay, Walmart, and TikTok Shop. Early-access members vote on the order.
Join the early-access list — founders lock $19/mo for life.
No card, no spam — just first access and a locked founders' rate.