The verdict in three sentences
Odoo wins on initial cost and time-to-market when your processes fit the standard; custom software wins the moment business differentiation becomes your competitive edge. Over 5 years, the financial tipping point depends mostly on the number of users and the volume of customization. The real question isn't the sticker price but the total cost of ownership and the level of dependency you accept.
Two models, two cost structures
Odoo charges recurring licenses plus an integrator; custom concentrates the investment up front, then narrows to maintenance. Here are 2026 orders of magnitude in the francophone market.
| Item | Odoo (SaaS + integrator) | Custom |
|---|---|---|
| License | 15-40 EUR/user/month | 0 (you own the code) |
| Setup | 15,000-60,000 EUR | 40,000-150,000 EUR |
| Heavy customization | 800-1,200 EUR/day integrator | Included in scope |
| Version upgrades | Rework customs each major version | Controlled in-house |
| Annual maintenance | Included in subscription | 12-18% of build/year |
| Code ownership | No (vendor) | Yes (balance-sheet asset) |
5-year TCO by number of users
The tipping point depends on headcount. 2026 estimate (order of magnitude) with Odoo at 30 EUR/user/month + 30,000 EUR integration, versus custom at 90,000 EUR + 15% maintenance/year.
| Users | Odoo 5 yrs | Custom 5 yrs | Gap |
|---|---|---|---|
| 10 | 48,000 EUR | 157,500 EUR | Odoo cheaper |
| 25 | 75,000 EUR | 157,500 EUR | Odoo cheaper |
| 50 | 120,000 EUR | 157,500 EUR | Near break-even |
| 80 | 174,000 EUR | 157,500 EUR | Custom wins |
| 120 | 246,000 EUR | 157,500 EUR | Custom wins |
| 200 | 390,000 EUR | 157,500 EUR | Custom wins |
Beyond 60-80 users, recurring license cost overtakes the amortization of your own build — even more so if your processes fall outside Odoo's standard.
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Mini case study
Claire, CFO of a 70-employee industrial SME in Lyon, compares both paths for her ERP. Odoo costs 30 EUR × 70 users × 60 months = 126,000 EUR in licenses, plus 35,000 EUR integration, i.e. 161,000 EUR over 5 years — before counting rework at each version. Custom comes to 95,000 EUR build + 14,000 EUR/year maintenance = 165,000 EUR, but the asset stays on the balance sheet and evolutions carry no license surcharge. Claire picks custom for her core business and keeps Odoo for standard accounting.
FAQ
Is Odoo really cheaper? Short term, yes, below 50 users. Beyond that, recurring licenses (30 EUR/user/month = 18,000 EUR/year for 50 users) flip the math within 3-5 years.
What is the lock-in risk with Odoo? Your customizations depend on the vendor's versions; each major upgrade can cost 5,000-20,000 EUR in rework, and migrating away is complex.
Is custom slower to deliver? Yes: expect 3-6 months versus 6-10 weeks for a standard Odoo. A focused MVP cuts that to 8-12 weeks.
Can you combine both? Absolutely. Many keep Odoo for accounting/HR and build custom for the module that differentiates them, connected via API.
Who owns the code in custom? You do. The code becomes a capitalizable asset, amortized over 3-5 years, with no vendor tie.
Let's scope your project. Share your processes, headcount and target budget: we'll price the Odoo scenario, the custom scenario and the optimal hybrid. 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.
