Guide / Strategy

Build vs buy software: how to decide

DeltaV engineering · 24 Sep 2026

Buy when a product fits. Configure when it almost fits. Integrate when your tools work but don't talk. Build when the workflow is valuable, repeated, and generic tools force workarounds.

01

Four options

OptionUse whenTrade-off
BuyStandard process. Speed matters most.Vendor's workflow, pricing and roadmap.
ConfigureThe product fits but is set up badly.Heavy customisation gets brittle.
IntegrateTools work alone; people copy data between them.Depends on reliable connections.
BuildValuable, repeated, poorly served by the market.You own it, and its upkeep.

02

Signals to build

  • The work repeats daily or weekly.
  • The cost is visible: hours, errors, lost revenue, slow decisions.
  • Someone can explain the process, exceptions included.
  • Configuring existing tools has been tried.
  • A small first version can prove the value.

03

Hybrid usually wins

Keep commodity tools: accounting, CRM, payments. Build only the layer that is yours, the dashboard, workflow or integration that reflects how you operate.

04

Ask any software partner

  1. What would you buy before building?
  2. What goes in the first release?
  3. How are existing data and integrations handled?
  4. Who owns the code, deployment and access?
  5. What do we measure after launch?