Odoo Inventory vs Katana: which one should you buy in 2026

Short answer

Buy Odoo Inventory if you need stock, accounting and purchasing in one system at a price you can read before you speak to a salesperson. Buy Katana if production is your real bottleneck and you have more people who need access than seats you want to pay for. Those are the two decisions this comparison comes down to, and they pull in opposite directions.

Odoo Inventory vs Katana at a glance

Which is cheaper, Odoo or Katana

Odoo, as far as anyone outside Katana can tell, and that is the point. Odoo publishes 19.90 EUR per user per month on annual billing for its Standard plan, with the caveat that this is a twelve month discount on a 31.10 EUR list price and that it applies only to the users you order initially. Katana has removed every price from its pricing page. The paid Advantage plan is described as a custom annual contract and the previous Starter and Professional ladder is gone.

That asymmetry matters more than any single number. A buyer can model Odoo's cost over three years on a spreadsheet this afternoon. A buyer cannot model Katana's at all without entering a sales process, and the free tier's 30 product ceiling means most businesses enter that process without a usable fallback.

Where the comparison flips is headcount. Odoo charges per user, so ten people on Standard is roughly 199 EUR a month and twenty is roughly 398 EUR. Katana includes unlimited users on both of its plans. For a workshop where eight people on the bench all need to check a work order, Katana's model is structurally cheaper, and quite possibly cheaper in absolute terms too. You will not know until you ask.

Which handles manufacturing properly

Katana, by a clear margin, and this is the honest reason to choose it.

Katana is built around production. Bills of materials, work orders, operations, shop floor sequencing and costing at the component level are the product, not an add-on. If you cut, assemble, brew, print or build, the vocabulary of the software matches the vocabulary of your floor, and that reduces training to something close to zero.

Odoo's Manufacturing app is a real module and is included in the Standard and Custom tiers. It does bills of materials, work orders and routings, and for assembly work it is sufficient. It is not as focused, and the reason is structural rather than a flaw: Odoo is a suite covering accounting, purchasing, sales, point of sale and dozens of other apps, and manufacturing is one of them. Breadth and depth are a real trade, and vendors who claim both are selling.

One practical warning. Odoo's free tier is one app. If you take Inventory for free and then need Manufacturing, you are on a paid plan for every user. Plan for that rather than discovering it.

Which is better for a European buyer

Odoo, on the evidence it publishes. Its privacy policy includes a physical data location table naming Europe (FR, BE) as the production region and France, the Netherlands and Sweden for backups. That is the most specific answer any vendor in this category gives. Katana states in its privacy policy that the service is hosted in the EU and that personal data is stored in centralised databases located in the EU, which is a real commitment but names no country and offers no selectable region. On AWS, with SOC 2 Type II, but you cannot point at a datacentre.

On despatch the gap is wider. Odoo's official third party shipper list contains Bpost and Sendcloud, and Sendcloud is the single connector that reaches DPD, GLS, PostNL, Colissimo and Royal Mail. Katana's integrations directory, twenty apps in total, names ShipStation, Shippo and 2Ship for shipping and no European carrier at all. If you ship parcels inside Europe, that is a cost you will carry separately.

Neither reaches a Continental accounting package. Katana connects to Xero and QuickBooks Online. Odoo does not need a connector because it has its own ledger, which is an advantage if you are willing to move your books and a complication if your accountant will not.

Who should buy which

Buy Odoo Inventory if your constraint is the ledger, if you want one system rather than two, if you need a cost you can forecast, or if European data location and European carriers are on your checklist. It is also the better answer for a distributor or retailer who does not manufacture at all, where the Manufacturing question never arises.

Buy Katana if your constraint is the bench. If the question that keeps you up is whether you have enough of component B to finish next week's run, Katana answers it natively and Odoo answers it adequately. Buy it also if you have a lot of people who need read access, because unlimited users on both plans is a genuine structural advantage over per seat pricing.

Buy neither if you are shipping thousands of parcels a month out of a warehouse with several pickers, because this is an inventory and production comparison and neither product is a warehouse management system. We set out that distinction in the difference between an ERP and a WMS, and the European shortlist for that case is in the best WMS for small warehouses in Europe.

How to decide this week

Run both free tiers in parallel, because both exist and both are usable. Put your real product file into Odoo's One App Free, which has no time limit, and put thirty of your real products into Katana's free plan with a real bill of materials attached. Then ask Katana for a written quote for your actual user count on day one, not day thirty, because that number is the whole comparison and it is the only figure in this article we could not publish.

If you want the wider field rather than these two, our ranking of inventory management software covers ten products on the same five criteria. If you publish a competing system, tell us what it does.