The verdict in three sentences
The 2026 rule is simple: buy what is common, build what differentiates you. A tool that does not set you apart (payroll, accounting, ticketing) should be a SaaS; a tool that carries your competitive edge deserves custom. The decision is made with a weighted scoring grid, not by gut feel.
Build vs buy: the priced criteria
2026 order of magnitude, ex-VAT, core-business tool for a New York mid-market firm.
| Criterion | Buy (SaaS) | Build (custom) |
|---|---|---|
| Upfront cost | EUR 0-10,000 (setup) | EUR 40,000-150,000 |
| Recurring cost | Per-seat licence | Maintenance 15-20 %/yr |
| Implementation time | Immediate to 4 weeks | 4-8 months |
| Business fit | 60-85 % | 95-100 % |
| Strategic differentiation | None (all rivals have it) | Strong |
| Technical risk | Low (proven product) | Medium (to be steered) |
| Code ownership | No | Yes |
The weighted scoring grid
Rate each criterion from 1 (favours buy) to 5 (favours build), then weight. Overall score > 3.5: build. < 2.5: buy. In between: hybrid.
| Criterion | Weight | Build score | Contribution |
|---|---|---|---|
| Strategic differentiation | 30 % | 5 | 1.50 |
| Required business fit | 25 % | 4 | 1.00 |
| Available budget | 20 % | 2 | 0.40 |
| Urgency/time | 15 % | 2 | 0.30 |
| Ability to maintain | 10 % | 3 | 0.30 |
| Weighted total | 100 % | 3.50 |
At 3.50 this case tips toward build: strategic differentiation dominates despite a tight budget and a short timeline.
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Mini case study
Mehdi, CIO of a B2B distribution mid-market firm in New York, is unsure about his dynamic pricing tool. A SaaS exists at EUR 1,200/month, live in 3 weeks, but covers 70 % of his pricing rules. Custom is quoted at EUR 90,000 + EUR 15,000/yr. He runs the grid: strategic differentiation 5 (pricing IS his edge), fit 5 (the SaaS misses his 30 % of key rules). Weighted score: 4.1 > 3.5 = build. SaaS 5-yr cost: EUR 72,000, cheaper... but the missing 30 % of rules cost him about 3 % margin on EUR 20M revenue, i.e. EUR 600,000/yr in lost margin. Custom, even at EUR 165,000 over 5 years, pays back in weeks. Verdict: build.
FAQ
Build vs buy in one sentence? Buy what is common to your sector, build what differentiates you. If the tool is identical at every rival, there is no reason to build it.
Is custom always pricier? In upfront cost yes (EUR 40,000-150,000 vs EUR 0-10,000 SaaS setup). But the analysis must include the lost margin of partial business coverage, often far larger.
How do I stop a custom project overrunning? Scope an MVP on the single differentiating feature, ship in 4-8 months, measure, then iterate. Too broad a scope is the leading cause of overruns in 2026.
What does 15-20 %/yr maintenance cover? Fixes, security updates, regulatory adaptations and small evolutions. It is the recurring equivalent of a SaaS licence, but on an asset you own.
Can I go hybrid? Yes, and it is often optimal: SaaS for common functions, custom for the differentiating core, all connected by API. The grid then serves to split the scope.
Let's scope your project. Send us your target tool, its strategic role and an indicative budget, and we will run the scoring grid and price build vs buy. 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.
