AMZScout's free Sales Estimator turns marketplace, category, and BSR into a monthly unit estimate so Amazon sellers can sanity-check demand before buying stock.
Asinhunt was a low-cost Amazon product-research web app, but asinhunt.com reset the connection on 2026-09-06 and is not confirmed shut down.
Keepa is an Amazon price-history tracker sellers use for BSR, Buy Box, FBA fee context, and API access across major marketplaces.
