When Should a Company Build Software Instead of Buying It?

A decision framework based on differentiation, control, capability and long-term cost.

Identify what is genuinely distinctive

Build when the process creates strategic advantage and available products cannot support it without harmful compromise. Routine functions often benefit from mature commercial software.

Count the full lifecycle

Custom software requires design, testing, security, hosting, support and continuous improvement. Buying shifts some work to a vendor but introduces subscription cost and dependence.

Preserve options

Use open standards, documented interfaces and exportable data. A staged approach—buying the commodity layer while building the differentiating component—often balances speed and control.