Why "inventory software" and "BOM software" are usually two different products
Most inventory management software tracks a flat list of items: you have quantity X of SKU Y. Most BOM software tracks structure: product Z requires 2 of component A and 1 of component B. Neither one on its own tells you the thing that actually matters day to day — if you build 10 units of product Z right now, do you have enough component A and B to do it, and what does your component stock look like afterward?
Businesses that make, assemble, or kit products end up running both a BOM spreadsheet and an inventory system side by side, updating one by hand whenever the other changes. That manual sync is where component counts quietly drift from reality — someone builds a batch, forgets to deduct the raw materials, and the next production run gets short-picked.
What changes when BOM and inventory share one system
When the bill of materials lives inside the same system as your stock counts, building or selling a finished good automatically deducts the right quantity of every component from raw-material stock — no second spreadsheet, no manual adjustment. Low-stock alerts can then fire on the component level, warning you that you are about to run out of a screw or a fabric roll before it stops a production run.
This also makes costing accurate in real time: because the system already knows the current cost of each component, it can roll that up into a live finished-good cost instead of a cost you calculated once and forgot to update after a supplier price change.
- Selling or building a finished good deducts its components from stock automatically
- Low-stock alerts trigger on raw materials, not just finished goods
- Finished-good cost rolls up from current component costs, not a stale manual estimate
- One stock count to audit, instead of reconciling a BOM sheet against an inventory system
Who actually needs this combination
This matters most for small manufacturers and assemblers: furniture makers building from hardware and lumber, electronics assemblers building from components, food producers batching from ingredients, and any business that kits several purchased items into one SKU it sells. If you buy and sell the exact same items with no assembly step, you need inventory software but not a BOM.
Multi-level BOM support matters once a finished good is built from sub-assemblies that are themselves built from smaller components — a chair built from a seat sub-assembly and a frame sub-assembly, each with their own component list. A flat, single-level BOM tool cannot represent that structure correctly.
What to check before choosing
A handful of features separate a real combined system from a BOM feature bolted onto an inventory tool as an afterthought:
- Multi-level BOMs (sub-assemblies nested inside other sub-assemblies)
- Automatic component deduction when a build or sale is recorded, not a manual stock adjustment step
- Component-level low-stock alerts, separate from finished-good alerts
- Live cost rollup from current component costs into a finished-good cost
- CSV import for existing raw-material lists, so you are not re-entering every component by hand
Track components and finished goods in one system
Build a multi-level BOM once, and StockFlow deducts the right components automatically every time you build or sell.
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