Odoo is enough when your business looks like others
Odoo brings invoicing, sales, purchasing, stock, CRM or accounting into one piece of software, with apps you switch on as needed. For a trading, retail or services SME with standard processes, it is often enough, and it is faster to start than a custom build.
The right first move: set Odoo up as it is, without programming anything. If your team works in it after a few weeks with no Excel exports or side notes, you have your answer. Keep it and spend nothing more.
Odoo costs more when you have to bend it
The problem is not Odoo, it is the gap between what it does and what your company does. The wider that gap, the more the bill moves from the subscription to the adaptation: modules to customise, custom code to maintain, an integrator to call back for every change.
On its pricing page, Odoo states that implementation, access to its experts and maintenance of custom code are not included in its plans. Those are exactly the lines that grow when the business falls outside the boxes.
- Your process is a house rule nobody else applies: a particular calculation, multi-step approval, frequent exceptions.
- Every need becomes a module to customise, and every Odoo update means checking that those modules keep up.
- Without an integrator nothing moves: you depend on one person who knows your configuration.
- Your teams work around the software, with Excel files on the side for what it cannot do.
Small gap with your business
- Covered by Odoo
- To adapt, on top
Odoo covers most of it: the subscription is enough.
Large gap with your business
- Covered by Odoo
- To adapt, on top
What sticks out is paid for on top: modules to customise, code to maintain, an integrator.
Compare costs over several years, not the first month
Odoo is paid per user per month. Its pricing page offers a free plan limited to a single app, then paid plans; Studio and the external API sit in the most complete plan. The amounts change, and a discount only lasts for the first 12 months: read them on odoo.com/pricing the day you compare, not in an article.
For custom software, the price is on our pricing page: from €3,900 excl. VAT, set in the proposal before you sign, first version in 21 days. There is no subscription. You only pay the hosting and the domain name to the provider, around €10 a month, and you own the code and the data.
To compare honestly, set two columns over 3 to 5 years. On one side: the Odoo subscription times the number of users, plus the integrator, plus maintenance of anything custom. On the other: the fixed price of the software, plus hosting. Ask the integrator for a written quote, as you would with us.
Both together: Odoo keeps the accounting, custom software does the rest
It is not all or nothing. If Odoo handles your accounting, invoicing or stock well, let it. Build next to it only the part that is specific to you, and connect the two so information is entered once.
That is the Celaé pattern: the application built for its business feeds its invoicing software instead of replacing it. With Odoo the logic is the same, and its external API exists for exactly this. You keep what works, build only what is missing, and your custom software stays small, so quick to deliver.
To place Odoo among the other options, see also our comparison of Excel, ERP, no-code and custom software.
Odoo
Accounting, invoicing, stock: what already works.
Your custom software
The part that belongs only to your business.
Published on 9 November 2026
