StockFlow vs Inventory Planner: Full System vs Forecasting Add-On
Inventory Planner by Sage forecasts demand on top of a system you already run. StockFlow is the full inventory system stock, purchase orders, and barcode scanning included, starting free.
Try StockFlow Free| Feature | StockFlow | Inventory Planner (by Sage) |
|---|---|---|
| Free plan (no credit card) | ||
| Standalone inventory tracking | ||
| Barcode scanning & receiving | ||
| Purchase order management | Suggested POs only | |
| Demand forecasting depth | Basic | Advanced (core focus) |
| Entry-level monthly price | Free | ~$120/month |
Inventory Planner figures based on publicly available pricing information as of mid-2026. Standard, Premium, and Enterprise tiers are quote-based confirm current pricing directly with Sage before buying.
What "Inventory Planner" actually is (and isn't)
"Inventory Planner" is a name that causes real confusion in searches, because it sounds like a general inventory system. It isn't one. Inventory Planner by Sage originated as an independent forecasting tool and was acquired by Sage in 2022; today it is a demand-forecasting and replenishment layer that connects to an existing store or inventory data source most commonly Shopify to analyze historical sales, segment products by performance, and generate suggested purchase orders based on projected demand.
Crucially, Inventory Planner does not itself record stock receipts, run barcode scans, or track physical warehouse locations it needs another system underneath it to supply that data. Pricing reflects that add-on positioning: an Essentials tier starts around $120/month, while Standard, Premium, and Enterprise tiers are quote-based and scale with your ecommerce revenue and the depth of AI-assisted forecasting you need, generally aimed at brands already doing meaningful annual GMV.
If you already run a full inventory platform and specifically want deeper demand forecasting on top of it, Inventory Planner can be a legitimate complement. But if you're choosing the core system that will track your stock day to day, comparing it against Inventory Planner is comparing apples to a forecasting layer you'd still need a base inventory system either way.
Where StockFlow fits instead
StockFlow is a complete inventory management platform, not an add-on. It tracks real stock levels across one or more locations, receives goods via barcode scan, manages purchase orders end to end, and flags low stock against a reorder point all on a free Starter plan. If your priority is knowing what you actually have in stock and keeping purchasing organized, StockFlow does that natively, without needing a separate system to feed it data.
- One platform for stock levels, purchase orders, and barcode receiving no separate base system required
- Free to start, so you can validate the fit before paying for forecasting sophistication you may not need yet
- Straightforward pricing by plan, not a quote-based enterprise contract
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