Desarrollo a la medida · Practical guide

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

Before requesting custom development, ask whether an existing product already covers your process. Off-the-shelf software is implemented faster and paid by subscription; custom development fits a particular process, but requires defining scope and maintaining it. This guide compares both paths with concrete criteria.

By the Avanza Code team

1. Advantages of custom software

Custom development makes sense when the process is part of what differentiates your business.

  • Own workflows and rules that a standard product does not cover.
  • Control over what is built first and over the data.
  • Direct integration with the systems you already use.
  • No paying for features you do not need.

2. Advantages of off-the-shelf software

An existing product or ERP makes sense when your process is common in your industry.

  • Faster start, using configuration instead of programming.
  • Published monthly price with improvements included.
  • Local compliance already solved, such as FEL and labor framework.
  • Lower risk: other businesses use the same product.

3. Costs that are often forgotten

Development cost does not end at launch. Some ERP vendors state it explicitly: maintenance of custom code is not included in the subscription price.

  • Maintenance and updates after each version change.
  • Support and bug fixing after launch.
  • Hosting, backups and security.
  • Your team’s time to define, review and approve each increment.

4. A middle path

Often the best option is to combine: use a product for the standard parts and build only what differentiates you, connected by API.

  • ERPNext for inventory, sales, purchasing and FEL invoicing.
  • A custom application for the particular process, connected by API.
  • Analytics dashboards on data from both.
  • Stages with deliverables you review before continuing.

5. What to define before quoting

A good quote starts from a written scope. With it you can compare development against the existing product.

  • Processes, users and roles.
  • Systems to integrate and who administers them.
  • Deliverables per stage and acceptance criteria.
  • Support and improvements after launch.

Sources

Data verified in official sources on October 21, 2026. Third-party prices and terms change: confirm on their site.