Build vs Buy

Short answer: A build vs buy decision compares two routes to the same business need. Building means paying developers, in-house or contracted, to create software designed around the company's own process. Buying means licensing or subscribing to an existing product and configuring it. Many real choices sit in between. A company might buy a core product and build connections or add-ons around it.

Buying is often faster and cheaper to start. The product already exists, and its maker spreads development costs across many customers. The trade-off is that the company adapts its process to the product. It also accepts whatever features the maker chooses to add or drop, and it pays ongoing fees. Building gives full control and a closer fit. But the company then carries the cost of design, testing, security, hosting, maintenance and future changes for as long as it uses the software. A common rule of thumb is to buy for standard needs, such as accounting or payroll. Building is worth considering where the process genuinely sets the company apart and no product fits it well.

A sound decision starts with written requirements that separate essential needs from preferences. The team then checks which existing products meet the essentials. It also notes how much configuration or process change each product would require. Next, the team costs both routes over the same period, usually three to five years. The cost covers setup, licenses or development, connections to other systems, support, maintenance and internal staff time. The team then compares risks: delivery risk for building, and dependence on a supplier for buying. Finally, it weighs how well each option fits the company's plans, how quickly each would start helping and whether the company has the skills to run it.

A company needs a tool to schedule field technicians. A packaged product costs 20,000 to set up and 30,000 a year. Five years of buying therefore cost 20,000 plus 150,000, or 170,000. A developer quotes 120,000 for a custom build, plus 25,000 a year for maintenance and hosting. Five years of building cost 120,000 plus 125,000, or 245,000. Buying is 75,000 cheaper over five years, but the company would have to change two dispatch steps. It must decide whether keeping those steps is worth 75,000.

This decision shapes cost, speed and flexibility for years. Before approving a build, leaders should see comparable multi-year costs for both routes. They should also name an owner who will maintain the custom software after the original developers move on. Finally, they need a clear reason why the process is worth building around.

Custom build estimates are often optimistic, and ongoing maintenance is easy to underestimate. Bought products can rise in price at renewal, change features or disappear when the maker stops selling them. Tools that make building easier do not remove the cost of maintaining what a company builds. The decision is worth revisiting when the company's needs or the products available to it change significantly.