What is the best software for managing spare parts inventory?

There is no single best tool, because three categories solve three different problems and most companies end up needing two of them.

A computerized maintenance management system (CMMS) manages maintenance: work orders, equipment history, and the parts consumed on each intervention. It knows what was used and where the stock physically sits. It is the right system of record for maintenance, and it is generally not built to decide how much to hold.

An enterprise resource planning (ERP) or warehouse management system (WMS) handles transactions and movements: receipts, issues, valuation, locations. It executes replenishment rules, but the rules themselves are usually static min/max thresholds that someone set once and rarely revisits.

An inventory optimization or supply planning tool decides the quantities: it forecasts intermittent demand, calculates safety stock per part against a service-level target, and recalculates as consumption and lead times shift. This is the layer most companies are missing, and it is why spare parts stock keeps growing while stockouts persist.

The useful question is therefore not which tool is best, but which layer you are missing. If you know what you consumed but not what to hold, the gap is in decision intelligence, not in tracking. Flowlity sits in that third category, and the spare parts planning page shows how it works alongside an existing ERP or CMMS.