“We already have an ERP, so we don't need a PIM” is the most common sentence in this discussion — and it's sometimes right. Here's how to tell when.
PIM and ERP get confused more than almost any other pair of systems in commerce — and understandably, because both hold something called “product data”. The confusion is expensive in both directions: buying a PIM expecting it to run your warehouse, or refusing one because “the ERP already has the products in it”.
An ERP exists to run the business: purchasing, stock, orders, invoicing, accounting. Its product record answers commercial questions — what does this article cost, how many do we have, who supplies it.
A PIM exists to sell the product: attributes a customer filters by, descriptions, images, translations, and the channel-specific shape each shop and marketplace demands.
Both hold “product data”. They hold different product data.
| Data | Belongs in |
|---|---|
| Purchase price, supplier, conditions | ERP |
| Stock, warehouse location, movements | ERP |
| Orders, invoices, returns | ERP |
| Descriptive attributes (material, size, fit) | PIM |
| Product copy, marketing text, translations | PIM |
| Images, media, channel-specific assets | PIM |
| Channel-specific fields and category mapping | PIM |
| SKU, GTIN | Both — synchronised, one leading source |
The simple test: if a customer sees it, it belongs in the PIM. If accounting or the warehouse needs it, it belongs in the ERP.
This deserves saying plainly, because it's often true. If your assortment is stable, comes from a handful of suppliers who deliver consistently, and you sell through one channel in one language, the product fields in your ERP can carry it. Adding a PIM at that point means maintaining a second system for a problem you don't have.
The picture changes when product content becomes real work:
None of that is what an ERP was designed to do. Forcing it usually produces a growing number of custom fields and exported spreadsheets — the informal PIM that everyone maintains and nobody owns.
In a healthy setup the ERP stays the commercial backbone and the PIM sits alongside it: article data flows ERP → PIM, the PIM consolidates supplier content, enriches gaps, and publishes each channel its own export. One rule matters more than the architecture: define which system leads for which field, so nothing is edited in two places.
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