Know your true sales velocity.
Most Amazon tools calculate sales velocity from raw order data — but when you're out of stock, that data lies. Seller63 filters the noise to show what your products actually sell when they're available.
Stockouts corrupt your data
When a product goes out of stock for 10 days in a month, your “30-day velocity” is based on only 20 days of real sales — but divided by 30. Every competitor tool makes this mistake. The result: you underorder, stock out again, and the cycle repeats.
Seller63 counts the days that matter
Our algorithm identifies every day your product was fully in stock, partially constrained, or completely out of stock. Velocity is calculated only from days with genuine demand signals — giving you a number you can actually reorder against.
Built for accuracy, not vanity metrics
Stock-Out Adjusted Velocity
Our two-pass algorithm filters out stockout periods, partial stockouts, and listing inactive days to reveal true underlying demand. Stop making inventory decisions based on understated sales data.
Real-Time Profitability
See today's estimated profit as orders come in, with settled historical P&L powered by Amazon's Seller Economics. Every fee, every refund, every ad dollar — accounted for per product, per marketplace.
Multi-Marketplace Reporting
Unified view across US, Canada, Europe, Australia, and beyond. Each marketplace's profitability calculated in local currency with cross-marketplace reporting in your chosen currency.
25 metrics that tell the whole story
From gross revenue to net profit after every Amazon fee, ad dollar, and refund. Broken down by product line, filterable by marketplace, with real-time estimates for today and settled actuals for history.
Stop guessing. Start knowing.
Seller63 is in pilot. Request a demo and we'll walk you through it.
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