WMS vs your ERP's inventory module
Your ERP's inventory module is often enough if it tracks stock per warehouse and your team picks from a few well-known places. A WMS adds the floor detail most ERPs cover thinly, such as exact pallet locations, scan-confirmed moves, pick routes, replenishment and cycle counts. The ERP stays the system for orders, purchasing and finance.
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| Topic | ERP inventory module | A WMS like Waresify |
|---|---|---|
| Main job | Orders, purchasing, invoicing and stock value. | The physical work inside the warehouse. |
| Level of stock detail | Usually per warehouse, sometimes per bin. | Per location, LP, item and lot. |
| Main users | Buyers, sales and finance staff in the office. | Workers and supervisors on the floor. |
| Floor work | Pick lists, often printed. | Tasks for receiving, putaway, picking, replenishment and counting, sent to each worker. |
| Confirming work | A user marks the order as picked. | The worker scans the location and LP, and the server checks both. |
| Choosing stock to pick | Often left to the picker. | Earliest expiry, then oldest receipt, then distance to outbound staging. |
| Refilling pick locations | Usually handled by hand. | Replenishment tasks raised from minimum and maximum levels. |
| Counting | Stocktake entry and variance posting. | Cycle counts by schedule or ABC class, with tolerances and recounts. |
| How they connect | Sends purchase and sales orders, receives stock results. | Receives order messages and sends movement events through a REST webhook connector. |
When the ERP is enough
If your warehouse is small, stock sits in a few fixed places, and errors are rare, the inventory module you already pay for may be all you need. One system means one set of item data and no integration to maintain.
Check first whether your ERP offers bin locations and mobile scanning. Some do, and switching those on can be cheaper than adding a second system.
What a WMS adds on the floor
A WMS tracks where each pallet and case sits, tells each worker what to do next, and confirms each step with a scan. It decides which lot to pick, when to refill a pick face and which locations to count today.
These details matter once several people work the floor at the same time, items live in more than one place, or customers expect lot traceability.
How Waresify works with your ERP
Waresify takes purchase orders and sales orders from the ERP as inbound messages. It sends events back, such as goods received, orders shipped and stock adjusted, through a REST webhook connector. Each company chooses which movement types notify its ERP.
The ERP stays the system for prices, invoices and stock value. Waresify is built for single-company warehouses, not for third-party logistics providers that store stock for many clients.
Questions
Do I replace my ERP with a WMS?
No. The ERP keeps orders, purchasing and finance. The WMS runs the warehouse and reports back to the ERP.
Which system holds the true stock figure?
The WMS holds quantities by location, and the ERP holds value. In Waresify, every stock change is a ledger movement, and the movements your ERP needs are sent to it as events.
Which ERPs can Waresify connect to?
Waresify uses a generic REST webhook connector instead of adapters for named products. An ERP or middleware that can send orders over REST and receive webhook events can connect.