Choosing between a custom ERP and a standard package means deciding who adapts to whom: the software to the way your company works, or your company to the software. If your processes are common, a well-configured standard is enough; if they are what sets you apart, bending them to a generic product has a cost that grows over time.

Here is how to tell which case you are in, and how to make the change without stopping work.

When a standard ERP is the right choice

A standard ERP covers the processes that many companies have in common. If the way you work fits within that scope, starting from scratch doesn't pay: the product is ready to use and the vendor takes care of updates.

  • Common processes: accounting, orders and inventory follow the rules of your industry, with no significant exceptions.
  • Adaptable habits: following the workflow the product provides doesn't cost you anything important.
  • Configuration is enough: what you need comes from the built-in settings, with no dedicated development.

Signs that standard is no longer enough

A standard package starts to feel tight when your processes are your competitive advantage, or when real work increasingly happens outside the system.

  • Processes that set you apart: price lists, product configurations or planning are part of why customers choose you, and the ERP forces you to simplify them.
  • Growing customizations: every change costs more and makes the next upgrade more delicate.
  • Data split across systems: sales, inventory and administration don't talk to each other, and the same data is entered several times.
  • Stopgap spreadsheets: exceptions live in Excel and the numbers are rebuilt by hand.

One sign alone is no reason to change course. If you recognize almost all of them, it's worth running the numbers.

What a custom ERP offers, and what it asks of you

A custom ERP starts from how the company really works: flows and exceptions are mapped, then only the modules you need are built. The result is a single source of truth for every department, without parallel spreadsheets, and a system that evolves with the company.

In return it asks for time from the people who know the processes, especially during analysis, and a partner able to maintain it and keep it evolving over the years.

The real cost shows over the years

The most common comparison is also the most misleading: the license price against a development quote. The honest comparison is based on cost over time, not the license.

With a standard ERP, the bill includes subscriptions, customizations to adapt to every new version, and integrations; with a custom ERP, development, maintenance and evolution. In both cases, the hours of manual work spent on double entry weigh in.

The misleading comparison

  • The license price alone
  • The quote for the first release
  • Customizations paid for once
  • Manual work left out

The useful comparison

  • The total cost over the years
  • Maintenance and evolution too
  • Adapting them to every new version
  • Hours spent on double entry

To see what drives the quote for a custom project, read our guide on how much custom software costs.

Integrating with what stays

Whatever you choose, the ERP doesn't work alone: e-commerce, CRM, e-invoicing, banks and logistics stay, and they need to exchange data with it every day.

Before you decide, be clear about which systems stay and which one is the source of truth for customers, prices and stock. With a custom ERP, integrations are designed together with the modules, not added at the end.

Changing your ERP doesn't mean changing everything: you replace only what no longer makes sense to keep.

To make the systems that stay work together, explore our system integration service.

Migrating module by module, without stopping operations

Switching over in one go concentrates all the risk in a single day. The safest route is one module at a time, with systems side by side.

  1. 01Process map: flows, exceptions and responsibilities, before writing any code.
  2. 02First module: the one that generates the most value, for example inventory or sales.
  3. 03Data migration: master data, history and documents from the old system, with thorough checks.
  4. 04Systems side by side: old and new run together for as long as needed, while people are trained.
  5. 05Next module: once the first is verified, the next one is added.

Questions to ask before you choose

Before comparing quotes, answer these questions frankly.

  1. 01Common or distinctive processes? If a competitor could work exactly like you with the same product, a standard ERP is probably enough.
  2. 02What do customizations cost? Add up those made so far and their weight at every upgrade.
  3. 03Where does your data live? Count the systems and spreadsheets needed to get one reliable number.
  4. 04Can we start with one department? A first module limits the risk and shows early whether the route is right.
  5. 05Who will keep it evolving? A standard ERP follows the vendor's plans, a custom ERP the partner who builds it: in the second case, be clear about who owns the code.

Common processes and few systems to connect point to a well-configured standard; distinctive processes, growing customizations and scattered data point to a custom ERP.

That's what we tell you frankly after an initial analysis, even when the right answer is a standard package. To see how we work, explore our custom ERP service.

  • ERP
  • Processes
  • Migration