Build vs Buy ERP: How to Decide

• Your processes are close to industry standard and you are willing to adapt the rest.
• You need standard accounting, payroll or stock control and nothing that sets you apart.
• You have no budget or appetite to own and maintain software.
• Speed to go-live matters more than a precise fit.

• Your core process — how you sell, schedule, price or deliver — is what makes you competitive.
• Off-the-shelf systems need so many workarounds that staff run the real process in spreadsheets anyway.
• You need several systems connected in a way no single product supports.
• Per-user licence costs would grow faster than the business.

The decision is rarely all-or-nothing. A common pattern is to use standard modules for the commodity parts — ledgers, payroll, stock — and build custom modules only for the processes that are specific to you, with integrations connecting the two.

This keeps the custom code small, so it is cheaper to build and support, while the parts that matter fit your operation exactly. It is how we approach custom ERP development.

• Which of your processes would you refuse to change to fit a product?
• Which systems must the ERP exchange data with, and do they have usable APIs?
• Who will own the system after go-live, in-house or a partner?
• What does the total cost look like over five years, including licences, support and changes?
• Who owns the code and the data if you change supplier?

If most of your answers point to standard processes, buy. If your core process is the reason customers choose you, build that part and buy the rest. When it is unclear, a short discovery sprint that maps your processes against standard modules usually settles it. See our engagement models.