When evaluating vertical AI software versus horizontal enterprise platforms like Microsoft Copilot, what criteria should our leadership team use to decide buy versus build?

Question

Tyler Smith · Accepted Answer

Leadership teams frequently get trapped in a false binary between writing proprietary software from scratch and waiting for massive enterprise suites to solve their problems. In reality, the decision comes down to your Three Uniques on the V/TO and the seats available on your Accountability Chart.

Horizontal platforms like Microsoft Copilot handle general business hygiene: drafting emails, summarizing meetings, and querying internal spreadsheets. If an operational problem is generic to all businesses, license horizontal tools immediately. Never attempt to build custom software for back-office communication or baseline document management.

Vertical industry platforms provide pre-built workflows specific to your sector, such as regulatory compliance filing or field service logistics. Buy vertical software if the workflow is industry standard and offers no sustainable differentiation. Even if the subscription fees look high, the total cost of ownership is a fraction of maintaining custom code.

You should only build internal custom tooling if the workflow directly powers one of your Three Uniques or your Core Focus. If a proprietary process is the reason clients buy from you rather than your competitor, using off-the-shelf software commoditizes your advantage.

Before authorizing any internal development, look at your Accountability Chart. Building custom software means creating permanent operational seats responsible for prompt engineering, API pipeline maintenance, security patches, and database hygiene. If you do not have an established technology seat capable of owning that technical debt, buy an existing solution. An exit-focused buyer values a clean subscription stack with documented workflows far higher than unvetted internal code that only one rogue engineer understands.