Building vs. Buying Software: A Decision Framework

Every technology decision eventually hits this question: should we build it ourselves or buy something that already exists?

The answer isn't always obvious—and getting it wrong is expensive.

Lean Toward Buying When:

• Commodity functionality: If many companies need the same thing, someone's probably already built it well
• Rapid deployment needed: Off-the-shelf ships faster than custom builds
• Limited technical capacity: Building requires ongoing maintenance resources
• Evolving requirements: Vendors absorb the cost of keeping up with market changes

Lean Toward Building When:

• Competitive differentiation: If this capability defines your competitive advantage, don't outsource it
• Unique workflow requirements: If off-the-shelf forces unacceptable compromises
• Integration complexity: Sometimes custom is easier than forcing incompatible systems to talk
• Long-term cost efficiency: At scale, ownership can be cheaper than licensing

The Hybrid Approach

Most situations aren't purely build or buy. Consider:

• Buy the core platform, build custom integrations: Use proven software as the foundation; customize the connections
• Buy for non-core, build for differentiators: Standard tools for standard needs; custom for competitive advantage
• Start bought, replace with custom as needs clarify: Use off-the-shelf to validate requirements, then build when you understand exactly what you need

Questions to Ask

• What's the total cost of ownership over 5 years—including implementation, maintenance, and opportunity cost?
• How much customization does off-the-shelf really allow?
• Do we have the team to build and maintain custom software?
• What happens if the vendor goes away or pivots?
• How unique are our requirements, really?

→ Related: Discuss your build vs. buy decision