Warehouse management software for small businesses and 3PLs in Spain: what each one does and when it fits

The question “what is the best warehouse management software?” cannot be answered with a name. Three kinds of software are sold under that label and they solve different things: the ones that invoice and keep the stock, the ones that print the shipping labels and the ones that run the inside of the building (bins, PDA, picking and, if you store other people's goods, billing each client). The best one for you is the one that solves the problem you have today.

This article goes through nine products, grouped by type. We make one of them, Ubika, so we set ourselves a rule to be fair: about the others we only say what each one states on its own website, read in November 2026, with no judgments of ours. What we could not check on their website, we left out. It is not a ranking.

The three types, in one table

The difference between the three types is explained at more length in how to choose warehouse software for a small business.

Business software and invoicing with stock

They run the company: quotes, invoices, purchases and, within that, how many units there are of each item and in which warehouse. They are the usual starting point when stock is still kept in a spreadsheet.

STEL Order. According to its website, it is cloud and mobile business management software for the self-employed and companies. Among its functions it names invoicing (quotes and invoices), purchases, the product catalog with stock control and multi-warehouse, which it describes as controlling the inventory of an unlimited number of warehouses and products.

Odoo. It presents itself as a suite of open-source business apps: accounting, CRM, purchases, inventory and more. Of Inventory, its website says it is its warehouse management app and lists product locations, barcodes and QR codes, routes and automatic transfers, serial numbers and batches, cycle counts, replenishment and integration with carriers to print labels. According to its pricing page, as of November 2026, using a single app is free and the plans with all the apps are paid per user per month.

Zoho Inventory. Its website describes it as online inventory management for businesses. The functions it lists: stock tracking with barcodes, by batch or serial number, low-stock alerts, several warehouses, selling on several channels with the stock in sync, orders, packing and shipping with carriers. According to its international pricing page, as of November 2026, it has a free plan (50 orders a month and one user) and paid plans from $29 a month per organization billed annually, taxes not included.

Shipping platforms

They take care of what happens once the order is ready: the label, the carrier, the tracking and the return. They do not say which bin the goods are in.

Sendcloud. It presents itself as a shipping platform for e-commerce. Its website lists: creating shipping labels, more than 170 carriers, tracking with the store's own brand, returns and a “Pick & Pack” function that it describes as picking orders without errors without using a WMS. According to its pricing page, as of November 2026, there is a €0/month plan and the paid ones start at €28/month plus €0.11 per label; the carrier's rate is separate.

Outvio. Its website describes it as an e-commerce management platform that covers fulfillment and shipping, tracking, customer support, and exchanges and returns. It has a version for logistics providers, Outvio 3PL, of which it says that it lets you ship with any carrier and manage all the clients from a single panel.

Warehouse management systems (WMS)

They run the building: each item in its bin, each movement confirmed with a scan and each operator with a task on the PDA. If the term is new to you, start with what a WMS is.

Ubika. It is ours. A cloud WMS for non-automated warehouses: small businesses, online stores that pick their own orders and 3PLs. It does receiving against the delivery note, putaway, stock by client, bin and batch, guided picking with a PDA, packing with verification, dispatch with a manifest and the driver's signature, returns and cycle counting. For a 3PL it adds a portal for each client and billing of storage and picking per client (the latter, from the Pro plan). The PDA is a web page that opens on a phone or on any Android. Orders come in from stores such as Shopify, PrestaShop or WooCommerce, and labels are requested from carriers such as CTT Express, MRW, Correos Express, SEUR, GLS, UPS or DHL. The price is published: 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 with no lock-in.

What Ubika is not: it is not accounting or invoicing software for the whole company, and it is not a carrier; it connects to them. And it is a new product, with little track record in the market so far. That is why the demo is set up with your data, so that you judge it by what you see.

Alier WMS, by AlierNet. According to its website, it is warehouse management software designed for companies with demanding operations, integrated with the company's ERP. It lists PDA-guided operations and configurable processes, routes, waves and picking with PDA or RFID, traceability, multi-company for logistics providers and a logistics billing module. Among the sectors it names are logistics providers, food, chilled goods, textiles and e-commerce.

Easy WMS, by Mecalux. Its website describes it as a warehouse management system designed to run medium and large warehouses, deployed in the cloud or installed on the customer's servers, and integrated with other systems.

Generix. It has two warehouse management systems, Generix WMS and Solochain WMS. Its website lists receiving, picking with wave management, packing and shipping with manifests and dock appointments, as well as batch traceability, and names consumer goods manufacturers, retail and e-commerce, and logistics providers as sectors. About getting started, it says it can take between three months and a year.

How to choose: eight questions

• →What is failing today: the invoice, the label or the building? Start with the type of software that fixes that, not with the most complete one.
• →Do you need to know which bin each thing is in, or is it enough to know how many units there are? The first is a job for a WMS.
• →Do you store other people's goods? Then you need stock separated per client, a portal for each one and a way to bill them for what is done.
• →Do you work with batches and expiry dates? Ask how they are captured at receiving and how the software makes sure what expires first leaves first.
• →Who is going to use it in the building, and with what? Ask whether the PDA is an app, a web page or a specific terminal, and what each one costs.
• →What does it have to talk to? Your store, your carriers and your invoicing software: ask to see the connection working, not the promise.
• →How does it charge? Per user, per orders or shipments, or custom; and what happens the month you go over.
• →How long until it is running, and who loads the data? Ask for a demo with your items and your orders, not with sample ones.

To prepare that demo there is how to test WMS software before you buy; if you are a logistics provider, what to check in software for a small 3PL; and about the money, how much a WMS costs.

You do not have to pick only one

The three types combine. The usual setup is for the business software to keep the invoices and the accounting, the WMS to run the building and the labels to come from the carrier or from a shipping platform. What matters is that they are connected and that each piece of data is typed only once.

If your problem is inside the building, you can see what Ubika does in warehouse management software or, if you store other people's goods, in software for 3PLs, and ask for the demo with your data.

Frequently asked questions

Keep reading

• How to count stock with a PDA: counting by bin, blind counts and approved differences
• Goods receiving in the warehouse, step by step
• Packing without errors: verify, pack, weigh and label
• Picking replenishment: minimums and maximums, reserve and pick bin

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