Home / Compare / Amazon Arbitrage & FBA Tools
Short answer:
| InventoryLab | SellerAmp SAS | |
|---|---|---|
| Pricing | Included in Threecolts Seller 365 from $69/mo (no standalone plan) | $19.95/mo (Getting Started), $29.95, $49.95 (Going Pro) |
| Free option | Free trial | 14-day free trial |
| Works with | Amazon | Amazon |
| Best for | FBA sellers who need listing, prep and accounting in one | Online and retail arbitrage sellers analysing deals |
| Strengths | + Accurate FBA profit tracking + Streamlined shipment workflow + Includes Scoutify | + Fast profit and ROI calculations + Eligibility and IP alerts + Works in-store on mobile |
| Weaknesses | - Amazon-only - Monthly cost | - Arbitrage-specific - Monthly subscription |
| Visit InventoryLab | Visit SellerAmp SAS |
InventoryLab handles FBA shipment creation, cost tracking and profit reporting, and includes the Scoutify 2 scanning app. It is now sold only as part of the Threecolts Seller 365 bundle. It is popular with retail arbitrage and wholesale sellers who want accurate profit numbers.
SellerAmp SAS (Selling Assistant) is a browser extension and mobile app that calculates profit, ROI, eligibility, Buy Box share and alerts for any Amazon product, using your own fees and buy cost. It is the most popular deal-analysis tool among arbitrage sellers.
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 InventoryLab: accurate fba profit tracking; for SellerAmp SAS: fast profit and roi calculations) weighed against its main drawback (amazon-only versus arbitrage-specific).
Still undecided? See InventoryLab alternatives or SellerAmp SAS 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.