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Know who's selling your SKUs — and who owns the Buy Box
Marketplaces are now 27% of US e-commerce (was 22% in 2018). Behind every SKU sits 5-50 sellers competing for Buy Box. Track who they are, what they sell, what they charge, and whether they should even be selling your brand.
| Seller | Price | Status |
|---|---|---|
|
BrandStore DirectAuthorized · FBA
|
$24.99 | BUY BOX |
|
PrimeDeals_NY4.8★ · 18,420 reviews
|
$24.99 | 3P · FBA |
|
QuickShipMart4.6★ · 9,231 reviews
|
$25.49 | UNAUTH |
|
BargainBin423.9★ · 432 reviews
|
$22.50 | UNAUTH · MAP↓ |
|
GlobalSeller_HK4.1★ · 2,108 reviews
|
$19.99 | SUSPECT |
Full seller intelligence per marketplace.
Identity, performance, catalog, Buy Box win-rate — the data brands need to control marketplace presence.
Seller identity
Seller name, business name, country, registration date, address (where exposed).
Feedback & ratings
Lifetime feedback, 30/90/365-day rating trend, count, recent issues.
Fulfillment type
FBA, FBM, 3PL, Prime-eligible — impacts shipping speed and Buy Box weighting.
Buy Box ownership
Hourly snapshots: who has Buy Box, at what price, what condition.
Buy Box history
Win-rate over time per seller — rotation patterns, exclusion events.
Authorized vs unauthorized
Cross-reference seller list against your authorized dealer registry — auto-flag rogues.
Seller catalog
What else does this seller list? Map their full SKU portfolio across marketplaces.
Cross-marketplace presence
Same seller across Amazon + Walmart + eBay tracked — cross-platform identity match.
Inventory signals
"In stock" depth signals where available — estimate seller inventory levels.
Marketplaces are now where brands win or lose.
Grey market is exploding
27% of US e-commerce now flows through 3P marketplaces (was 22% in 2018). Brands without seller visibility lose pricing control, brand integrity and customer experience.
Buy Box is the ad shelf
82% of Amazon sales go through Buy Box winner. Knowing who wins — and at what price — tells you what your effective shelf is.
Authorized vs unauthorized
Unauthorized sellers cause MAP violations, return-rate spikes, and brand erosion. Identifying them is step 1 of enforcement.
Network mapping
One bad seller often runs 5-10 alias accounts. Seller-catalog and cross-marketplace mapping exposes the network behind a single bad actor.
What brands & agencies do with seller intel.
Unauthorized seller enforcement
Identify rogues, send cease-and-desist, track removal — legal team feed.
Buy Box recovery
Spot when your authorized seller loses Buy Box, understand why, take action.
MAP violation source
Tie MAP violations back to specific sellers — enforce against repeat offenders.
Counterfeit source mapping
Cluster suspect sellers by catalog overlap — identify counterfeit supply networks.
Distributor channel audit
Verify authorized distributors aren't leaking inventory to grey market resellers.
3P revenue intelligence
Estimate what competitor 3P sellers move per category — market sizing.
Buy Box win-rate KPI
Track your own authorized seller's Buy Box win-rate as a brand health metric.
Marketplace expansion planning
Before launching on a new marketplace, audit existing seller landscape for that category.
Investor diligence
For VCs evaluating consumer brands, audit seller landscape & channel health pre-investment.
From brief to seller intel feed in 24 hours.
Send your authorized dealer list
And the SKU list to monitor.
Free sample feed
Within 24 hours, sample with all sellers per SKU + auth-flag + Buy Box.
Production pipeline
Hourly Buy Box, daily seller catalog refresh.
Enforcement workflow
Alerts, cease-and-desist tracking, removal verification — closed-loop.
Seller intelligence FAQs
Seller name, business name, country, feedback rating, feedback count, lifetime feedback, recent ratings, fulfillment type (FBA/FBM/3PL), and Buy Box ownership history per SKU.
Hourly Buy Box snapshots showing which seller wins, their price, and condition. We can also track losing offers to map seller competition per SKU.
Amazon (all marketplaces), Walmart 3P, Flipkart 3P, eBay sellers, Etsy shops, Best Buy 3P, AliExpress sellers, Shopee, Lazada and more.
Yes — we cross-reference seller data against your authorized dealer list to flag unauthorized sellers, gray-market resellers and counterfeit sources.
Hourly for Buy Box on hero SKUs, daily for seller catalog and metrics. Custom cadence available.