Custom software vs off-the-shelf: how to decide

The question behind the question

"Should we build or buy?" is really asking: is this process part of what makes us different?

If you run payroll the same way as every other company in your country, buying a payroll system is almost always right. If your dispatch logic is why customers choose you over competitors, building it is worth considering, because packaged software will push you toward the industry average.

A simple decision matrix

Comparing total cost honestly

Off-the-shelf software looks cheaper because the costs are spread out and partly hidden. Compare five-year cost on both sides.

Packaged software (SaaS)

• Subscription per user, rising as you grow
• Paid add-ons and higher tiers for needed features
• Integration work and middleware subscriptions
• Staff time spent on workarounds and duplicate entry

Custom software

• Discovery, design and build
• Hosting and monitoring
• Maintenance, typically 15 to 20 percent of build cost per year as a planning figure
• Enhancements as the business changes

Neither is "free after launch". The difference is where you get flexibility and what you own.

The middle path: customize an existing product

Many organizations do not need to choose between rigid SaaS and a blank-page build. Starting from a product that already covers most needs, and customizing the rest, combines speed with fit. This is how we deploy our own 13 products: FMS for facilities or ASSURA for audit can be extended with client-specific workflows, reports and integrations, without building the core from scratch.

Signs you should build

• You have tried two or more products and each needed heavy workarounds.
• The process involves proprietary logic, data or algorithms.
• You plan to sell the software, or offer it to partners.
• Licensing for your user base would exceed build and maintenance cost within three years.
• Integration requirements are so specific that packaged tools cannot meet them.

Signs you should buy

• The process follows common practice (accounting, payroll, email, basic CRM).
• Speed matters more than fit.
• You lack the budget or internal ownership to maintain a custom system.
• A mature product with a strong local partner exists.

If you build, do it in a way you can own

• Insist on owning the source code, infrastructure scripts and documentation.
• Use mainstream technologies with large talent pools.
• Deliver in small, usable increments rather than one large release.
• Budget for maintenance from day one.

Our custom software development service follows these principles, and our guide on scoping a software project and estimating cost explains how to get an estimate you can trust.