The verdict in three sentences
In 2026, adapting an off-the-shelf platform (Odoo-style or a vertical solution) costs EUR 15,000 to 60,000 to implement plus EUR 24 to 40/user/month in licences, while building custom takes EUR 45,000 to 120,000 with no recurring licence. The tipping point is often around 25 to 40 users over 4 years: beyond that, custom becomes cheaper in total cost of ownership. The real question is not the entry price but the business specificity and the lock-in you accept.
Entry cost and recurring cost
The trap is comparing entry tickets. You must reason in 4-year TCO. 2026 ranges (order of magnitude).
| Item | Off-the-shelf | Custom |
|---|---|---|
| Initial implementation | EUR 15,000-60,000 | EUR 45,000-120,000 |
| Licence / user / month | EUR 24-40 | EUR 0 |
| Heavy customization | EUR 8,000-30,000 | included |
| Major version upgrade | EUR 5,000-20,000 / yr | controlled in-house |
| Hosting | included or EUR 20-50/user | EUR 100-500/mo |
| Vendor lock-in | high | none (code is yours) |
Under 15 users with a standard need, off-the-shelf almost always wins. Custom takes the lead when the business process is your competitive edge or when licences pile up.
The 4-year tipping point
Cumulative TCO for a management need, off-the-shelf licence at EUR 32/user/month. Custom is set at EUR 75,000 one-off plus EUR 4,000/yr hosting and light maintenance.
| Users | Off-the-shelf 4 yrs | Custom 4 yrs | Winner |
|---|---|---|---|
| 10 users | 15,360 + 30,000 = EUR 45,360 | EUR 91,000 | Off-the-shelf |
| 20 users | 30,720 + 30,000 = EUR 60,720 | EUR 91,000 | Off-the-shelf |
| 30 users | 46,080 + 35,000 = EUR 81,080 | EUR 91,000 | Off-the-shelf (close) |
| 40 users | 61,440 + 40,000 = EUR 101,440 | EUR 91,000 | Custom |
| 60 users | 92,160 + 45,000 = EUR 137,160 | EUR 95,000 | Custom |
The crossover sits around 35 to 40 users. That threshold drops if your business needs heavy customization (each version upgrade fragilizes it) and rises if your need stays standard.
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Mini case study
Claire, CFO of an industrial SMB in Lyon with 45 staff, is undecided on her production-management tool. Off-the-shelf: EUR 40,000 implementation, EUR 22,000 business customization, licences 45 users x EUR 32 x 48 months = EUR 69,120, plus 2 version upgrades at EUR 12,000. 4-year TCO: EUR 143,000. Custom targeting only her critical production process: EUR 88,000 + EUR 16,000 maintenance over 4 years = EUR 104,000, with no licence or lock-in. 4-year saving: roughly EUR 39,000, and the code stays hers. She picks custom for the core module and keeps a spreadsheet for the peripheral.
FAQ
When does custom pay off? Often above 35 to 40 users over 4 years, or sooner if your business process needs heavy customization that off-the-shelf fragilizes at every upgrade.
What are the hidden costs of off-the-shelf? Customization (EUR 8,000-30,000), major version upgrades (EUR 5,000-20,000/yr), paid modules and above all vendor lock-in that makes exit costly.
Isn't custom riskier? The risk is controlled by upfront scoping and slice-by-slice delivery. In return, you own the code and remove all recurring licences.
Can we go hybrid? Yes, and it is often optimal: off-the-shelf for the standard (accounting, HR) and custom for the process that differentiates you. You avoid overpaying at both extremes.
How to decide quickly? Three criteria: business specificity (high = custom), user volume (>40 = custom), evolution roadmap (fast = custom for agility).
Let's scope your project. Give us your user count, your critical processes and your budget: we'll cost the off-the-shelf vs custom TCO over 4 years and decide with you. 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.
