The decision between custom and off-the-shelf software is almost always framed as a cost question: custom is expensive, SaaS is cheaper, therefore default to SaaS. This framing is wrong often enough to be worth examining. The more useful question is: does your competitive advantage live in this software?

When off-the-shelf wins

  • The process is standard — accounting, HR, most CRM workflows.
  • You need it now. A SaaS product can be deployed in days.
  • You can accept someone else’s roadmap.
  • Switching costs are low.
  • When custom wins

  • The software is the product.
  • Off-the-shelf requires so many workarounds that the real cost is higher than custom.
  • You need integrations no vendor supports.
  • Data ownership or compliance requires control.
  • Five questions to answer before deciding

  • Does this software reflect a business process that differentiates us from competitors?
  • What is the real total cost of the off-the-shelf option — including integration work and workarounds?
  • What is the cost to switch to custom in 18 months when we have outgrown it?
  • Do we have engineering capacity to maintain custom software?
  • Is the vendor likely to change pricing or availability in a direction that hurts us?
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