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Keepa
https://keepa.com
Overview
Keepa tracks Amazon price, rank and stock history for millions of products — critical when you import a product from China and sell on Amazon. Its historical charts reveal the real sales velocity of a product (via Best Sellers Rank history) and typical price ranges, so you can price your import competitively.
Best for
Amazon sellers checking product demand and price history before ordering
Pricing
Free browser extension; paid plans for full data
Pros
- Deep historical price and rank data
- Free browser extension
- Reveals seasonal demand patterns
Cons
- Advanced data needs subscription
- US Amazon focus (international limited)
- Learning curve for charts
Alternatives in E-commerce & Dropshipping
Jungle Scout
Amazon product research tool
Helium 10
Amazon seller suite
Spocket
US/EU dropshipping suppliers