The verdict in three sentences
Off-the-shelf (Odoo or any vertical licence) is cheaper to start — EUR 8,000-30,000 in implementation — but adds EUR 20-40/user/month forever and forces you to bend your process to the software. Custom requires EUR 40,000-120,000 upfront, no licence, and fits your business exactly. The decision rule is one sentence: if your process is a competitive advantage, build custom; otherwise, buy the standard product.
The real cost is not the purchase price, it's the 5-year TCO
Comparing an Odoo quote to a custom quote on implementation alone is a trap. What matters is the total cost of ownership over 5 years: licences, maintenance, customisation and the hidden cost of workarounds (the infamous Excel exports when the software can't keep up).
| Criterion | Off-the-shelf / Odoo | Custom |
|---|---|---|
| Implementation | EUR 8,000 - 30,000 | EUR 40,000 - 120,000 |
| Recurring licence | EUR 20 - 40/user/month | EUR 0 |
| Heavy customisation | EUR 500 - 700/day | Included by design |
| Process fit | Medium (you adapt) | Total |
| Code ownership | No (vendor) | Yes |
| Time to go live | 2-4 months | 4-8 months |
Over 5 years the recurring licence becomes the dominant line item as soon as headcount grows.
The switch threshold: number of users
The more users you have, the heavier the per-seat licence weighs on TCO. Above a certain volume, custom with no licence mechanically becomes cheaper.
| Users | 5-yr TCO Odoo (EUR 30/mo) | 5-yr TCO custom (80k base + 12k/yr) | Winner |
|---|---|---|---|
| 10 users | 8,000 + 18,000 = 26,000 | 140,000 | Odoo |
| 25 users | 20,000 + 45,000 = 65,000 | 140,000 | Odoo |
| 50 users | 25,000 + 90,000 = 115,000 | 140,000 | Close |
| 80 users | 30,000 + 144,000 = 174,000 | 140,000 | Custom |
| 120 users | 30,000 + 216,000 = 246,000 | 140,000 | Custom |
The 2026 switch threshold sits around 50-60 active users — but it drops sharply if your process demands heavy customisations Odoo bills by the day.
Mini case study
Sophie, COO of a logistics SME in Berlin (45 users), is torn. Odoo: EUR 22,000 implementation + EUR 30/user/month = EUR 81,000 over 5 years, plus 25 days/year of customisation (a specific routing process) at EUR 600 = EUR 75,000 of custom over 5 years, totalling EUR 156,000. Custom at EUR 90,000 + EUR 12,000/year maintenance comes to EUR 150,000 over 5 years, with a tool matching her exact routing logic — her competitive edge. She chooses custom: comparable TCO, but proprietary process preserved.
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FAQ
Is off-the-shelf always cheaper?
Upfront yes, but not over 5 years. Above 50-60 users or with heavy customisation, custom with no licence catches up then overtakes Odoo on TCO.
What does Odoo implementation really cost?
Between EUR 8,000 and 30,000 depending on modules, excluding licences (EUR 20-40/user/month) and specific development billed at EUR 500-700/day.
When is custom essential?
When your process is a competitive advantage: bending it to standard software erases what sets you apart. In that case custom is an investment, not a cost.
How long to deploy each option?
Odoo: 2 to 4 months. Custom: 4 to 8 months. Custom takes more patience but delivers an asset you own.
Can we start small with custom?
Yes, via a EUR 30,000-50,000 MVP covering the critical process, then iterate. It is often healthier than an over-customised Odoo.
Let's scope your project. Tell us your user count, key processes and target budget, and we'll compute your comparative 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.
