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Knowing what your competitors are selling — and when they add or drop products — gives you a meaningful sourcing edge. Sellers who react to market shifts faster than the competition consistently win the Buy Box and capture margin before a product becomes saturated. Seller Aim surfaces this competitive intelligence directly as you browse Amazon, putting actionable data about rival sellers and brands at your fingertips without requiring you to build complex tracking systems of your own.

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Storefront Widget

The Storefront Widget overlays competitive data directly onto Amazon storefront pages as you browse them. When you visit a competitor’s storefront, Seller Aim loads an interactive widget alongside the page — no extra tabs, no copy-pasting seller IDs into external tools. What you can see:
  • The products a competitor is currently selling, along with pricing and catalog size at a glance
  • How aggressively they are pricing relative to the Buy Box across their catalog
  • Category and brand distribution — useful for understanding their sourcing strategy
Primary use case: When you’re trying to break into a new product category, find a successful seller operating in that space and review their storefront. The products they stock consistently are likely profitable enough to justify repeated sourcing. The Storefront Widget lets you gather this signal in minutes rather than hours.

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Seller Spy

Seller Spy takes storefront research a step further by letting you track a specific seller’s catalog changes over time. Rather than a one-time snapshot, you receive ongoing intelligence about what that seller is doing — product by product. What Seller Spy tracks:
  • New additions: Products the seller has recently added to their catalog
  • Removals: Products they’ve stopped selling or let go out of stock
  • Price movements: Shifts in their pricing on individual ASINs
  • Stock level changes: Signals of increased or decreased buying activity
Primary use case: If a top-performing seller in your category suddenly starts buying a product you haven’t considered, that’s a meaningful signal worth investigating. Conversely, if multiple strong sellers all drop the same product around the same time, that’s a warning to avoid or exit that ASIN. Seller Spy surfaces these patterns automatically so you don’t have to monitor storefronts manually.
Seller Spy update frequency: Seller Spy checks tracked storefronts on a regular polling schedule. Catalog additions and removals are typically detected within 24–48 hours of the change occurring on Amazon. Price and stock changes are captured at similar intervals. For fast-moving situations, treat Seller Spy data as a near-real-time signal rather than an instant feed.
Seller Spy is an add-on feature available as part of select Seller Aim plans. Check your account dashboard or the pricing page to confirm availability on your current plan.

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Brand Analyzer

Brand Analyzer shifts the lens from individual sellers to entire brands, giving you a research tool built specifically for wholesale and brand-approval sourcing decisions. Before investing time in cold-outreach or distributor relationships, use Brand Analyzer to validate that a brand is actually worth pursuing. What Brand Analyzer shows you:
  • Full catalog overview: Every product a brand sells on Amazon, with estimated revenue figures for each ASIN
  • Buy Box ownership breakdown: How the Buy Box is distributed across third-party sellers, and what share Amazon itself holds on the brand’s listings
  • Amazon’s own presence: Whether Amazon Retail is actively competing on the brand’s catalog — a critical factor in whether third-party resellers can win the Buy Box at a viable margin
  • Reseller opportunity scoring: Which products within the brand have the strongest opportunity for third-party sellers based on Buy Box rotation, pricing headroom, and demand
Primary use case: Use Brand Analyzer to qualify a brand before you invest in a wholesale account relationship. If Amazon is winning the Buy Box on 80% of a brand’s catalog, the economics for third-party sellers are likely difficult. If third-party sellers are rotating the Buy Box freely across a large, high-demand catalog, that’s a brand worth pursuing.
Run Brand Analyzer on a brand before you contact the supplier or distributor. Walk into the conversation knowing the brand’s top-performing ASINs, realistic Buy Box share, and how saturated the catalog already is with competing resellers. This preparation makes your pitch more credible and helps you negotiate minimum order quantities with real data behind your projections.
Brand Analyzer is an add-on feature available as part of select Seller Aim plans. Check your account dashboard or the pricing page to confirm availability on your current plan.

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Offers Panel

On any individual product page, the Offers Panel gives you a complete picture of the competitive landscape for that specific ASIN. Rather than guessing how many sellers you’d be competing against, you can see the full field before you commit. What the Offers Panel displays:
  • All current sellers listed on the ASIN, with their current prices and whether they are fulfilling via FBA or FBM
  • Buy Box percentage: An estimated breakdown of how frequently each seller is winning the Buy Box, giving you a realistic sense of how Buy Box rotation is shared
  • FBA vs. FBM status: Quickly distinguish between sellers using Amazon’s fulfillment network and those shipping from their own facilities — important when modeling your own FBA margins against existing competition
  • Stock checker: An estimated stock quantity for each FBA and FBM seller currently on the listing. Sellers with low stock may be exiting the ASIN; sellers building stock are likely planning to compete aggressively
Reading competition level: As a rough benchmark — a listing with two to five rotating FBA sellers at similar prices generally represents a healthier competitive environment than one with fifteen sellers fighting to the bottom. The Offers Panel gives you the data to make that call quickly.

Wholesale Sourcing Guide

Learn how to identify wholesale-worthy brands, approach suppliers, and build a scalable wholesale sourcing operation using Seller Aim’s research tools.

Online Arbitrage Guide

Discover how to find profitable OA leads, evaluate them quickly with Seller Aim’s panel, and build a consistent arbitrage sourcing workflow.