The verdict in three sentences
An off-the-shelf solution wins when your need is generic and your team small: instant rollout, low entry cost, updates included. Custom software wins beyond ~30 users or when your process is a competitive edge no standard SaaS models. The decision hinges on total cost over 3-4 years, not the headline first-month price.
Recurring vs investment: the 2026 figures
Assumption: management tool for an Amsterdam SME, 20 users.
| Item | Off-the-shelf (vertical SaaS) | Custom software |
|---|---|---|
| Unit price | 30 - 150 EUR/user/month | — |
| Year-1 cost (20 users) | 7,200 - 36,000 EUR | 25,000 - 90,000 EUR (build) |
| Annual recurring cost | 7,200 - 36,000 EUR | 6,000 - 18,000 EUR (support) |
| Rollout time | 1 - 4 weeks | 8 - 20 weeks |
| Customization | Limited to options | Full |
| Data ownership | With vendor | With you |
| Evolution | Vendor roadmap | On demand |
At 20 users and 60 EUR/month, the license costs 14,400 EUR/year in recurring spend that grows with headcount. Custom ties up more upfront but its marginal cost per extra user is near zero.
Break-even and decision rule
| User count | SaaS 60 EUR/mo (3-year total) | Custom 45,000 EUR + support 800/mo (3 yr) | Advantage |
|---|---|---|---|
| 10 users | 21,600 EUR | 73,800 EUR | SaaS |
| 20 users | 43,200 EUR | 73,800 EUR | SaaS |
| 30 users | 64,800 EUR | 73,800 EUR | Break-even |
| 45 users | 97,200 EUR | 73,800 EUR | Custom |
| 70 users | 151,200 EUR | 73,800 EUR | Custom |
Custom cost barely moves with user count, while the license is linear. Break-even lands between 2.5 and 4 years depending on the negotiated rate and growth speed.
Mini case study
Claire, CFO of an industrial SME in Amsterdam (28 users), pays a vertical SaaS at 85 EUR/user/month, i.e. 28,560 EUR/year. With 3 hires planned per year, the bill hits 34,000 EUR in year 3. Custom software is quoted at 55,000 EUR + 1,000 EUR/month support, i.e. 91,000 EUR over 3 years. The SaaS totals ~92,000 EUR over 3 years. Near-perfect tie — but the custom tool encodes her specific work-order nomenclature, absent from the SaaS, tipping Claire toward custom for year 4 and beyond.
FAQ
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At how many users does custom pay off?
Generally beyond 30 users, or sooner if the per-seat rate is high (>100 EUR/month) or your process is non-standard.
Is custom riskier?
The risk is project management, not tech. With a scoped MVP, 2-week sprints and continuous acceptance testing, risk is controlled. Off-the-shelf has its own risk: dependence on the vendor's roadmap and price hikes.
Can you start off-the-shelf then move to custom?
Yes, it's common. Validate the need with a SaaS, then build custom when the limits (customization, per-seat cost) become blocking.
Who owns my data with an off-the-shelf solution?
The vendor hosts it; you use it but reversibility can be costly. With custom, data stays with you, on your infrastructure.
How much does custom software maintenance cost?
In 2026, budget 500 to 1,500 EUR/month of support (fixes, evolutions, security), versus the growing recurring cost of a license.
Let's scope your project. Share your user count, process specificity and budget: we'll model the off-the-shelf vs custom break-even for your case. 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.
