The verdict in three sentences
Odoo wins when your processes match the standard 80% and you accept adapting your organization to the tool. Custom wins when your business rules are too specific: each Odoo 'specific' is costly and undermines your version upgrades. For a distribution SME, decide on the specifics ratio and your tolerance for lock-in, not on the licence price.
Odoo vs custom: the 2026 comparison
Order-of-magnitude 2026 figures for a European distribution SME of 20 to 50 users.
| Item | Odoo (configured standard) | Custom build |
|---|---|---|
| Licence | 25 to 50 EUR/user/month | 0 |
| Integration/config | 10,000 to 40,000 EUR | Included in dev |
| Development | Specifics: 600 to 1,200 EUR/day | 50,000 to 120,000 EUR |
| Maintenance | Included (edition) + specifics to re-test | 15 to 20%/year of dev |
| Version upgrade | On you (specifics to redo) | Controlled |
| Lock-in | Medium to high | Low |
| Time to go live | 2 to 4 months | 4 to 8 months |
The classic trap: an Odoo project started 'standard' drifts to 40% specific developments, and each yearly migration forces you to re-test and re-code those specifics.
The cost of Odoo specifics, line by line
This is where the real bill is set. A business need not covered by the standard is built in billed person-days.
| Specific distribution need | Estimated effort | 2026 cost |
|---|---|---|
| Per-customer/volume pricing rules | 5 to 10 days | 3,000 to 12,000 EUR |
| Multi-depot management with reservation | 8 to 15 days | 4,800 to 18,000 EUR |
| Delivery-route optimization | 10 to 20 days | 6,000 to 24,000 EUR |
| Connector with supplier ERP | 6 to 12 days | 3,600 to 14,400 EUR |
| B2B reseller ordering portal | 12 to 25 days | 7,200 to 30,000 EUR |
Add three of these lines and you're already at 20,000-50,000 EUR of specifics, on top of the recurring licence: custom becomes competitive again.
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Mini case study
Marc, owner of a 32-employee industrial-supplies wholesaler in Lyon, is comparing options for his management system. Odoo: 30 users at 40 EUR/month = 14,400 EUR/year in licences, plus 30,000 EUR of integration and 35,000 EUR of specifics (pricing, routing, B2B portal). Over 5 years: 30,000 + 35,000 + 72,000 (licences) + migration re-tests ≈ 140,000 EUR. Custom quoted at 95,000 EUR + 15,000 EUR/year = 170,000 EUR over 5 years, but with no recurring licence and full ownership. Small gap, qualitative call: since his routing and pricing are his real edge, Marc picks custom for the core and keeps Odoo for accounting alongside.
FAQ
Is Odoo really cheaper than custom? On paper, yes, as long as you stay close to the standard. Once specifics exceed 30-40% of the need, the cumulative licence + developments + migration re-tests catches or overtakes a targeted custom build.
What is Odoo lock-in? Your data and specifics live in Odoo's ecosystem and data model. Switching ERP later is costly, and each major version upgrade forces you to redo your specific developments.
How much does an Odoo version upgrade cost? Expect several person-days per specific to re-test and adapt, often 5,000 to 20,000 EUR per yearly migration depending on the volume of developments. It's a recurring cost often forgotten in the initial comparison.
Can you do custom only on the core business? Yes, that's the recommended hybrid approach: Odoo or a SaaS for accounting and purchasing, custom for differentiating logistics and pricing, all linked via API.
How long to deploy? Configured standard Odoo: 2 to 4 months. Custom focused on the core: 4 to 8 months in agile cycles. In both cases budget for change management and training.
Let's scope your project. Send us the list of your specific business rules: we price Odoo + specifics against a targeted custom build, with compared 5-year TCO. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
