// Guide · 6 min read

Custom software or off-the-shelf? How to decide

A practical way to decide between buying SaaS and building a custom app: where each wins, the hidden costs, and the questions to ask first.

By Simple To Work ·

Most businesses should buy software first. Payroll, email, accounting and chat are solved problems, and someone else maintains them for you. Custom software earns its place in a narrower set of cases, and knowing which case you are in saves a lot of money in both directions.

When off-the-shelf is the right call

  • The process is the same in every company, like payroll, email or e-signature.
  • You can change how you work to fit the tool without losing anything that makes you different.
  • A handful of people use it, so per-user pricing stays small.
  • The vendor is established and the tool is a core part of what they sell.

When custom software pays for itself

  • The work is what makes you different. If your pricing, scheduling or fulfillment is the reason customers choose you, forcing it into a generic tool removes the advantage.
  • You are paying for three tools that each do a third of the job. The glue between them (exports, spreadsheets, copy-paste) is where the hours and the mistakes go.
  • Per-user fees have grown with your team. Fifty technicians at a per-seat price every month adds up to the cost of a custom build within a few years.
  • Customers need to do something themselves. Portals for ordering, booking or uploading documents are often specific to how you work.
  • The data needs to come together. When answers live across an ERP, a storefront and a warehouse system, a custom integration is often the only way to get one trustworthy number.

The costs people forget

Off-the-shelf has hidden costs: workarounds, the spreadsheets that grow around the tool, price increases at renewal, and features you pay for but never use. Custom has its own: hosting, maintenance, security updates and the time your team spends explaining how the work is done. Compare both over three years, not just the first invoice.

A middle path

You rarely have to choose all or nothing. A common pattern is to keep the standard tools (accounting, email, payments) and build a thin custom layer where your business is different: a portal on top of your ERP, a field app that writes into your accounting system, or a dashboard that combines data from everything else.

Questions to ask before you decide

  • Which part of this process do customers actually notice?
  • How many hours a week go into exporting, re-entering or reconciling data?
  • What will the per-user cost be when the team is twice the size?
  • If the tool raised its price by half next year, what would we do?
  • Who will own and maintain a custom app after launch?

If most of the answers point to standard work, buy. If they point to the work that makes you different, a small custom build usually beats a big subscription.


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