Home / Compare / Amazon Arbitrage & FBA Tools
Short answer:
| Keepa | WAMP | |
|---|---|---|
| Pricing | Free extension; data subscription €29/mo or €290/yr | Free (beta); WAMP Pro coming soon |
| Free option | Yes | Yes (free for life beta) |
| Works with | Amazon (all marketplaces) | Walmart Marketplace |
| Best for | Anyone buying or selling on Amazon | Walmart retail, online and wholesale arbitrage sellers |
| Strengths | + Essential price and rank history + Free basic charts + Powerful product finder on paid plan | + Free during beta + Built by the SellerAmp team + Walmart-specific fees and rules |
| Weaknesses | - Steep learning curve - Advanced data requires subscription | - Walmart only - Pro features not released yet |
| Visit Keepa | Visit WAMP |
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Keepa tracks Amazon price and sales rank history for millions of products and displays charts right on Amazon product pages. Arbitrage sellers use it to see whether a price is stable, how often the item sells, and whether Amazon itself is on the listing.
WAMP is SellerAmp's sourcing analyser for Walmart Marketplace. A Chrome extension shows profit calculations, historic price and sales charts, Buy Box analysis and restriction badges for Walmart products, so you can check a Walmart flip the way SellerAmp checks an Amazon one.
Retail and online arbitrage on Amazon live and die by data: sales rank, price history, Buy Box competition, fees and ungating restrictions. These tools range from free browser extensions to full research suites. Beginners usually start with one scanner app plus Keepa, and add a sourcing suite once they are consistently profitable. The deciding factors usually come down to each tool's standout strength (for Keepa: essential price and rank history; for WAMP: free during beta) weighed against its main drawback (steep learning curve versus walmart only).
Still undecided? See Keepa alternatives or WAMP alternatives.
Flip Profit Calculator ($12)
Spreadsheet that returns net proceeds, max buy price, ROI and a GO / COUNTER / PASS decision with fees for 10 platforms, plus a 500-row flip log and dashboard.
Marketplace Pricing Cheat Sheet ($7)
Fees for 8 resale platforms, max-buy and ROI formulas, comp check, net payout table and shipping reference on 6 printable pages.
Instant digital downloads sold via Gumroad.
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Checked 2026-10-17. Confirm current pricing on each site.