The Framework That Worked for SaaS Does Not Work for AI
Every technology leader has a build vs. buy framework. It usually weighs total cost of ownership against customization needs, factors in maintenance burden, and produces a decision. That framework was built for a world where software capabilities were relatively stable. Buy Salesforce, customize it, and you know roughly what it will do for the next five years.
AI has shattered that assumption. The underlying capabilities change every few months. A model that required custom fine-tuning six months ago now handles the same task with zero-shot prompting. A workflow you built in-house is now a commodity feature in three competing platforms. The shelf life of a build vs. buy decision in AI is roughly 90 days.
The New Variables
Traditional build vs. buy considers cost, time, and control. AI build vs. buy must also consider:
- Rate of model improvement. If the underlying models are improving rapidly for your use case, building custom infrastructure locks you into yesterday's capabilities. Buying gives you access to improvements automatically.
- Data network effects. If your competitive advantage comes from proprietary data, building gives you a moat that buying cannot. But be honest about whether your data is actually proprietary and actually valuable.
- Integration surface area. AI tools that need deep integration into existing workflows favor building. AI tools that operate on well-defined inputs and outputs favor buying.
- Regulatory exposure. In regulated industries, the accountability chain matters. Building gives you full control over the audit trail. Buying means your compliance depends on a vendor's roadmap.
The Hybrid Reality
The most effective approach we see is not build or buy. It is build the orchestration, buy the intelligence. Use proprietary models and third-party services for the AI capabilities themselves, but own the layer that connects those capabilities to your business logic, data, and workflows.
The companies that thrive in the AI era will not be the ones that build everything or buy everything. They will be the ones that know exactly where the boundary should be, and revisit that boundary relentlessly.
Revisit Quarterly
Set a calendar reminder. Every 90 days, re-evaluate your build vs. buy decisions in the context of what has changed. New model capabilities, new vendor offerings, new competitive dynamics. The decision you made in January may be wrong by July. That is not a failure of judgment. It is the reality of building in a fast-moving domain.