Build vs. Buy: The Enterprise Decision Framework

A data-driven analysis of when custom development is the right choice — and when a SaaS solution delivers more value.

Research ReportDecember 2, 202514 min

The Dilemma: Custom or Standard?

Every enterprise organization regularly faces the build-vs-buy question. The cost of a wrong choice is significant: building too early wastes millions, staying too long with a SaaS solution can cost competitive advantage. Our framework helps make this decision objectively.

The 4 Decision Criteria

Criterion 1: Strategic differentiation — does the software deliver a unique competitive advantage? Criterion 2: Process specificity — do your processes significantly deviate from market standard? Criterion 3: Integration depth — how many customizations are needed to integrate a standard solution? Criterion 4: Scalability — how quickly do your requirements change?

The Hidden Costs of Both Options

Build: don't underestimate the costs of maintenance, security patches, and team continuity — typically 20-25% of the initial investment per year. Buy: don't underestimate the costs of customizations, vendor lock-in, and license escalation at scale — on average 15-30% higher TCO than initially budgeted.

The Hybrid Approach: The Best of Both Worlds

More and more enterprise organizations are choosing a hybrid approach: standard SaaS for commodity processes, custom development for differentiating processes. A composable architecture makes it possible to make the optimal choice per domain and adjust it later without disrupting the whole.

Key Takeaways

  • Use 4 objective criteria to support the build-vs-buy decision
  • Maintenance costs for custom software: 20-25% of initial investment per year
  • SaaS TCO is on average 15-30% higher than the initial budget
  • Hybrid composable architecture offers the best of both worlds

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