Home / Compare / Amazon Arbitrage & FBA Tools
Short answer:
| InventoryLab | Tactical Arbitrage | |
|---|---|---|
| Pricing | Included in Threecolts Seller 365 from $69/mo (no standalone plan) | Only sold in the Threecolts Seller 365 bundle, from $69/mo |
| Free option | Free trial | Trial |
| Works with | Amazon | Amazon; scans 1,000+ retail websites |
| Best for | FBA sellers who need listing, prep and accounting in one | Online arbitrage sellers sourcing at scale |
| Strengths | + Accurate FBA profit tracking + Streamlined shipment workflow + Includes Scoutify | + Automates online arbitrage sourcing + Wholesale list analysis + Huge retailer coverage |
| Weaknesses | - Amazon-only - Monthly cost | - Expensive for beginners - Requires tuning filters |
| Visit InventoryLab | Visit Tactical Arbitrage |
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.
Tactical Arbitrage (now part of the Threecolts Seller 365 bundle) scans retail websites and matches products to Amazon listings to find profitable price gaps automatically. It also has reverse search and wholesale manifest analysis. It is a heavy-duty tool for sellers committed to online arbitrage.
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 Tactical Arbitrage: automates online arbitrage sourcing) weighed against its main drawback (amazon-only versus expensive for beginners).
Still undecided? See InventoryLab alternatives or Tactical Arbitrage 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.
Checked 2026-10-17. Confirm current pricing on each site.