EcomSanity vs Onepage48 Catalog CSV Preflight: Which Is Better in 2026?

EcomSanity is Amazon seller analytics software built for sellers who need a clear, actionable view of their catalog without switching between reports. It brings sales, inventory, advertising spend, ACOS and ROAS, Buy Box status, returns, and storage-fee exposure into one console. Data is synced automatically from Amazon's official Selling Partner API (SP-API) every six hours, so sellers can spend less time exporting spreadsheets and more time acting on the signals that matter.
The dashboard highlights sales velocity and days of inventory so stockouts can be spotted before a listing goes dark. Buy Box percentage and conversion are tracked per ASIN, alongside sessions and units ordered, helping sellers see when a listing is quietly losing the Buy Box. Returns are measured against units sold in the same window, with disposition and reason breakdowns. Storage-fee monitoring flags ASINs approaching Amazon's aged-inventory surcharge tiers, including the 181-day threshold, before charges arrive.
EcomSanity also keeps PPC performance next to sales and inventory at the ASIN level. Sellers can review ad spend and ACOS across 1-, 7-, 15-, and 30-day windows, plus category rollups. For private-label sellers, optimization features include bid recommendations based on conversion and ACOS history, search-term harvesting, wasted-spend detection, and ACOS-to-TACOS targets tied to real margin. Eligible orders can be surfaced for compliant review requests within Amazon's allowed window.
Connect once through official Amazon SP-API OAuth and let the panel refresh on its schedule. EcomSanity is designed for resellers, arbitrage sellers, private-label operators, and multi-category catalogs that need signal instead of noise. A free plan is available.
The product is intended to make routine monitoring faster and clearer for growing Amazon businesses. Instead of waiting for an end-of-month report, operators can use scheduled data and focused alerts to decide what to reorder, which ASIN needs attention, where advertising is inefficient, and which inventory is at risk of aged fees. EcomSanity keeps the workflow centered on the catalog and the decisions sellers make every day.
What problem it solves
Amazon sellers often have the data they need spread across Seller Central reports, ad dashboards, inventory screens, and spreadsheets. EcomSanity turns those disconnected signals into one prioritized view, helping sellers catch stockouts, Buy Box losses, returns, ad waste, and long-term storage-fee risk before they erode margin.
Alternatives & competitors
EcomSanity is an alternative to manually combining Amazon Seller Central reports, spreadsheet workflows, and disconnected seller analytics dashboards. It focuses on actionable ASIN-level signals across sales, inventory, Buy Box, returns, advertising, and storage fees.

Check a copy of a product CSV before importing. The general checker flags duplicate SKUs, missing product names, invalid non-negative integer prices or stock, and image-URL syntax issues. Original files stay unchanged; it does not connect to or import into a store.

A free browser preview checks up to 20 rows. The existing Korean/English ZIP is KRW14,900 once, with up to 1,000 data rows, 100 columns and 2 MiB, UTF-8/BOM or explicitly selected CP949, and CSV/TXT findings. No XLSX, automatic fixes, URL availability checks or import-success guarantee. Developed with AI assistance; no customer outcomes are claimed. Final tax and total appear at checkout.