The verdict in three sentences
For a manufacturing SME in 2026, Odoo costs 25,000-80,000 EUR to implement + 20 to 40 EUR/user/month, while a custom ERP costs 60,000-120,000 EUR with no per-seat fee. The right answer depends on how standard your processes are: choose Odoo for classic needs, custom when a process is a competitive advantage. In most cases the optimal solution is hybrid: Odoo for the standard + custom modules on the differentiator.
5-year TCO compared (30 users)
| Item | Odoo (integrator) | Custom ERP |
|---|---|---|
| Initial implementation | 25,000 - 80,000 EUR | 60,000 - 120,000 EUR |
| Licenses / subscriptions | 30 EUR/user/mo → 54,000 EUR / 5 yrs | 0 (no per-seat fee) |
| Maintenance & evolutions | 8,000 - 15,000 EUR/yr | 8,000 - 18,000 EUR/yr |
| Hosting | Included / cloud | 3,000 - 8,000 EUR/yr |
| 5-year TCO (order of magnitude) | ≈ 120,000 - 210,000 EUR | ≈ 110,000 - 210,000 EUR |
At 30 users, the TCOs converge: Odoo's per-seat cost eventually catches up with the higher entry ticket of custom. Below 15 users, Odoo keeps the edge; above 50, custom often becomes cheaper over 5 years.
Decision grid
| Situation | Recommendation |
|---|---|
| Standard processes (purchasing, stock, accounting) | Odoo / SAP Business One |
| Few users (< 15) | Odoo (low per-seat cost) |
| Differentiating core process | Custom on that scope |
| Many users (> 50) | Custom or hybrid |
| Specific MES / production need | Custom modules on Odoo base |
| Code-ownership requirement | Custom |
Hybridization is often the most rational path: keep Odoo for finance, purchasing and standard stock, and build custom only for the module that differentiates you (scheduling, quality, specific traceability). You cap the budget while protecting your process advantage.
Mini case study
Claire, CFO of a 60-employee manufacturing SME near Lyon (38 ERP users), hesitated between a full Odoo and a custom ERP. The 5-year math: Odoo at 30 EUR/user/mo = 68,400 EUR in licenses + 55,000 EUR implementation = 123,400 EUR, versus a targeted custom build at 95,000 EUR (production + quality) complemented by free Odoo Community for accounting. The hybrid option comes out about 28,000 EUR cheaper over 5 years, while keeping control of the scheduling module, the core of her industrial performance.
FAQ
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Odoo or custom: which is cheaper?
Under 15 users, Odoo almost always wins. Above 50, custom often becomes cheaper over 5 years because it has no per-seat fee.
Can we combine Odoo and custom?
Yes, it is the most common route: Odoo for standard processes, custom modules (via API) for the differentiator. You cap the budget while protecting your edge.
How much does a custom ERP cost in 2026?
Expect 60,000 to 120,000 EUR depending on the number of critical modules. A scope targeting a single process (production, quality) can start lower.
What is Odoo's real hidden cost?
The per-user monthly fee, which accumulates: at 30 users and 30 EUR/month, that is over 54,000 EUR across 5 years, excluding implementation and evolutions.
How long to deploy?
Standard Odoo: 3-6 months. Targeted custom: 4-8 months with a first release in production within 3 months.
Let's scope your project. Give us your user count, core processes and indicative budget, and we'll cost Odoo, custom and hybrid side by side. 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.
