How to choose warehouse software for a small business: ERP with stock, shipping platform or WMS

November 4, 2026 · 8 min read

When a small business looks for "software to run the warehouse" it finds three kinds of tool that are sold with similar words but do different things. Choosing well starts with knowing which of the three problems you have.

1. Management and invoicing programs with stock control

These are the ERPs and invoicing programs that, besides customers, quotes and invoices, keep the stock of each item (for example Holded, STEL Order or Odoo). They know how many units you have and deduct them when you sell.

They are enough if your warehouse is small, one or two people know it by heart and what you need is for stock and invoicing to match. They fall short when you have to tell an operator which bin each thing is in, pick many orders a day without errors or receive goods checking them against what the supplier announced.

2. Shipping platforms

These are the tools that connect your store to the carriers to print labels and track parcels (for example Sendcloud). Some add aids for picking orders.

They are enough if your problem is shipping: comparing carriers, printing labels fast and notifying the customer. They fall short for what happens before the carton: locations, replenishment, receipts, lots and expiry dates, stock counts.

3. Warehouse management systems (WMS)

A warehouse management system (WMS) runs the inside of the warehouse: where each unit is, what has to be picked and in what order, what has arrived and where it is stored. The operator works with a PDA or a phone that tells them which bin to go to and confirms each item with a scan.

You need one if you pick orders every day, have locations, several people in the warehouse or several sales channels, or if picking errors are already costing you returns and customers. It is usually used alongside the invoicing program, not instead of it.

Quick comparison

Swipe the table sideways to see all the columns →

Need	ERP / invoicing with stock	Shipping platform	WMS
Knowing how many units I have	Yes	It depends	Yes
Knowing which bin each unit is in	Uncommon	No	Yes
Guiding the operator and scanning while picking	Uncommon	Sometimes	Yes
Carrier labels	Sometimes	Yes	Yes, if connected
Receiving against the purchase order or the supplier's notice	Sometimes	No	Yes, carton by carton
Lots, expiry dates and FEFO	Sometimes	No	Yes
Invoices and accounting	Yes	No	Not its job

"It depends", "sometimes" and "uncommon" mean that it varies a lot from one product to another: always ask with your specific case.

Signs that you already need a WMS

→There are picking errors: wrong item, wrong size, units missing.
→Time is lost looking for products, or only one person knows where everything is.
→The stock in the system does not match the stock on the shelves.
→You sell in several places at once (your website, Amazon, marketplaces) and stock gets out of step between them.
→You work with lots or expiry dates and the wrong one leaves first.
→New people join for peak season and take days to become productive.

What to ask before choosing

→What hardware do I need? Will a phone or an Android device with a scanner do?
→Does it connect to my store, my marketplaces and my carriers?
→How does data move to and from my invoicing program?
→Is the price public? Is there a lock-in period or a setup cost?
→Can I try it with my own items and locations before signing?

If you have doubts about the cost, how much a WMS costs lists the pieces that make up the price. And if today you run everything in a spreadsheet, see how far Excel goes.

Where Ubika fits

Ubika is a WMS for non-automated warehouses: online stores that pick their own orders, and third-party logistics providers. The PDA runs on a phone or any Android device with a scanner, orders flow in automatically from Shopify, WooCommerce, PrestaShop, Amazon and other channels, and it prints the labels of the usual carriers in Spain. Pricing is public (from €199/month, no lock-in) and we set up a demo with your own data for you to try it. If your warehouse fits in one person's head and you do not pick orders every day, you probably do not need it yet: an invoicing program with stock is enough.

Frequently asked questions

Which is better for a small business, an ERP with stock control or a WMS?

If you only need to know how many units you have and to invoice, an ERP or invoicing program with stock is usually enough. If you pick orders every day, have locations, several people in the warehouse or picking errors, you need a warehouse management system (WMS), which guides the operator bin by bin and confirms with a scan.

Can a WMS be used alongside the invoicing program?

Yes, that is the usual setup: the invoicing program keeps handling customers, invoices and accounting, and the WMS runs the warehouse. It is worth asking how data moves between the two.

Does a shipping platform replace warehouse software?

Not entirely. Shipping platforms generate labels and track parcels, and some add picking aids. They do not usually handle locations, receipts against an advance notice, lots and expiry dates, or stock counts, which is the job of a WMS.

How many orders a day justify a WMS?

There is no fixed figure. More than the number, what counts are the signs: picking errors, time spent looking for products, stock that does not match, dependence on one person who 'knows where everything is' or several sales channels at once.

How much does a WMS cost for a small business?

It depends on volume, warehouses and integrations. Ubika publishes its pricing: Start €199/month up to 1,000 shipments a month, Pro €499 up to 3,500 and Max €799 up to 8,000, VAT not included and no lock-in.

Keep reading

What Ubika does: warehouse management software · software for 3PLs · WMS for e-commerce