AI Build vs Buy Decision Framework
When to build custom AI vs buy off the shelf. Decision framework.
Buy when
- Standard capability widely available
- Vendor will out-innovate internal build
- Speed to value matters
- Limited engineering resources
- Compliance requirements complex
Build when
- Workflow specific to firm
- Differentiation strategic priority
- Integration depth required
- Long-term economics favor build
- Available engineering capability
Hybrid (most common)
Buy foundation tools, build differentiation on top. Most enterprises hybrid.
Bottom line
Match approach to strategy. Pure buy or build rarely optimal.
Frequently asked questions
Should I build or buy AI?
Usually both — buy foundation, build differentiation. Strategic mix. Few enterprises pure buy or pure build.
When to skip building?
Standard capabilities, limited engineering, fast time-to-value needed. Most use cases buy initially.
When custom builds make sense?
Firm-specific workflows, strategic differentiation, integration depth, available engineering capability.
Build cost?
$50k-10M+ depending on scope. Plus ongoing maintenance 15-25% annually. Substantial investment.
Lock-in considerations?
Building creates internal lock-in. Buying creates vendor lock-in. Choose deliberately.
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