Custom Platform vs Off-the-Shelf SaaS: 2026 Decision Framework (Singapore)

The verdict in three sentences

Off-the-shelf SaaS costs little upfront but becomes a rent for the vendor: 15 to 80 EUR/user/month, i.e. 30,000 to 150,000 EUR/year at 100 users. A custom platform requires 60,000 to 150,000 EUR one-off + 10-15% maintenance/year, but the cost stabilizes and you own the code. The switch threshold sits between 3 and 5 years depending on user count and how specific your processes are.

5-year TCO: SaaS vs custom

The real comparison is not the entry price but total cost of ownership (TCO) over time. Here is a 2026 simulation for 100 users, SaaS at 45 EUR/user/month.

Over 5 years, custom here comes to about half the SaaS cost. But beware: at 20 users, SaaS is only 10,800 EUR/year and custom never pays back. The math depends on YOUR volumes.

The hidden costs of SaaS to factor into the decision

The advertised per-user price is only the visible part. Several line items inflate a SaaS TCO and strengthen the case for custom beyond a certain stage.

When your processes become a competitive advantage, generic SaaS levels you down. That is the most reliable signal to switch to custom, independent of the pure TCO calculation.

Mini case study

Paul runs a 180-employee logistics mid-cap in Singapore. It uses a route-management SaaS at 52 EUR/user/month for 90 licenses, i.e. 56,160 EUR/year. The SaaS cannot handle its port-zone constraints, forcing costly manual re-keying.

A custom platform quote comes to 105,000 EUR + 13,000 EUR maintenance/year. Over 5 years: SaaS = 280,800 EUR, custom = 157,000 EUR, a 123,800 EUR saving and the end of re-keying (estimated at 6 h/week per planner). The switch threshold is reached by year 3, with the port-specific logic becoming a commercial differentiator too.

FAQ

From how many users does custom become profitable?

2026 order of magnitude: beyond 60 to 100 users paying 40-60 EUR/month, a custom platform generally pays back in 3 to 4 years. Below 30 users, SaaS is almost always cheaper.

What is the exit cost of a SaaS?

Often underestimated: limited data export, proprietary formats, retraining. Expect several person-weeks and sometimes extraction fees, which reinforces vendor lock-in.

How much is custom platform maintenance?

Between 10 and 15% of the build cost per year, i.e. 9,000 to 15,000 EUR for a 90,000-100,000 EUR platform. This covers fixes, security and small evolutions.

Is custom riskier?

The risk lies mainly in scoping. An MVP delivered in iterations, with a lean scope, limits exposure. Conversely, SaaS transfers dependency and price-increase risk to you.

Can you combine both approaches?

Yes, often the smartest path: keep SaaS for commodity functions (email, HR) and build custom only the differentiating core. This optimizes overall TCO.

Let's scope your project. Give us your user count, your current SaaS and its annual cost, and we'll model your 5-year build-vs-buy TCO. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.