What your competitors add, drop, and carry

Track what competitors sell. Find what you're missing

Track competitor catalogs daily, see what they're adding, and discover brands gaining traction across your niche.

Get Started
Seller Spy interface showing competitor tracking results
HOW IT WORKS

From competitor analysis to sourcing opportunities

Add a seller once. Seller Spy watches their catalog every day so you don't have to.

Adding a seller storefront in Seller Spy
Why it matters

Your competitors already know what to source next

No visibility into what they're adding, which brands are gaining traction, or how your catalog compares. Seller Spy removes all three.

Sourcing opportunities

Brands competitors carry that you aren't stocking

See brands your competitors carry that you don't. Brands are ranked by how many tracked sellers stock them, helping you spot the strongest opportunities first.

Opportunities feed ranked by number of competitors carrying each brand
Catalog overlap Venn diagram showing shared and unique products
Competitive gap

Focus on the competitors that matter

See how closely a seller overlaps with your catalog before spending time reviewing their products. Analyze their brands, categories, and recent additions in one view.

Catalog changes

Every product your competitors added

Competitors who sell well in your niche have already validated what works. Every product a tracked seller adds comes back with brand, category, model, and whether you already carry it.

Changes view showing competitor product additions with brand and category data
What's included

Everything needed to track competitors and uncover sourcing opportunities

Competitor tracking, catalog monitoring, and brand opportunity discovery.

Daily storefront tracking

Full catalog pulled every day, enriched with title, brand, category, and model

Sellers overview

New brands, products, opportunities, and activity across every seller in one view

Opportunities feed

Brands multiple competitors carry that aren't in your catalog, ranked by competitor count

Catalog overlap

Venn diagram of products only they carry, only you carry, and what you share

Seller classification

Brand owner, distributor, 3rd-party, or Amazon — shown on every seller profile

Brands tab

Every brand a seller carries with product count, first seen date, and in-catalog flag

Changes view

Products added and removed with brand, category, and overlap status

Export

Download the full product list per seller as XLSX with brand and model data

Workflow

Seller Spy surfaces the opportunities. These tools let you act on them.

From competitor catalog to sourcing — every step happens inside Seller Assistant.

Discover
Brand Analyzer

Send any brand from the Brands tab directly to Brand Analyzer. The brand name pre-fills.
Analyze
AI Supplier Finder

Find a supplier for any brand you identify through competitor tracking — launch directly from Seller Spy.
Source
Products

Add competitor products to your sourcing pipeline in bulk directly from the Products tab.
Analyze
Price List Analyzer

Top sellers in a price list analysis can be added to Seller Spy tracking directly.
Complete your workflow

From first spot to placed order

Spot sellers worth tracking, validate what you find, and move identified products toward an order.

Restriction Checker

Check selling eligibility on products you find competitors carrying.

Analyze
Browser Extension

Add any seller to tracking directly from their Amazon product page or storefront.

Discover
Suppliers

Source identified brands through your existing supplier relationships.

Source
Purchase Orders

Place orders for identified products you've decided to source.

Source

Frequently Asked Questions

Visit Help Center
How does Seller Spy track competitor storefronts?
Paste an Amazon storefront URL and Seller Spy pulls the seller's full product catalog. From that point, it updates daily — logging every product added or removed, along with brand, category, and model data, and whether those products are already in your catalog.
What is the Opportunities feed?
The Opportunities feed shows brands that multiple competitors in your tracking list carry that are not in your catalog. Brands are ranked by how many tracked sellers stock them, so the most commonly held brands appear first — helping you prioritize the strongest sourcing opportunities.
What does the catalog overlap show?
The catalog overlap is a Venn diagram that compares any tracked seller's catalog against yours. It shows products and brands only they carry, only you carry, and the ones you share — making it easy to spot gaps without manually comparing lists.
How often is tracking updated?
Seller Spy checks every tracked seller's storefront daily. New products, removed products, and brand additions all appear in the Changes view, filterable by 7, 30, or 90-day windows.
Can I add competitor products directly to my sourcing pipeline?
Yes. From the Products tab inside any tracked seller, select products and add them to your sourcing pipeline in bulk. They appear in your Products database with brand, category, and model data already filled in.
Can my team track sellers too?
Yes. Seller Spy is available to every team member in your Seller Assistant workspace. Tracked sellers, the Opportunities feed, and catalog data are shared across the team.

Ready to find brands you're missing?

Track competitor storefronts, find the brands gaining traction across your niche, and add promising products to your pipeline.

Get Started

Not sure which plan fits your sourcing workflow? Chat with our team — we're happy to help.