Custom software: what it is, what it costs and when to choose it

Custom software is software designed from scratch around the processes of one organisation. Off-the-shelf products, however, serve needs that many organisations share. This article explains the difference, the cost drivers and the right moment to choose each.

What is custom software?

Custom software is a solution a team builds around your user roles, rules and existing systems. In other words, it is a tailor-made product. The team first analyses how you work, and then shapes the software to match.

The result may be an admin panel, a customer portal, a mobile app or an integration. In most projects, however, several of these come together.

Off-the-shelf versus custom software

Either approach can be the right choice. What matters is knowing which one works under which conditions. The table below sums up the main differences.

When is custom software the right choice?

Not every business needs a tailor-made system. However, if you recognise several of these signs, consider the option seriously:

• The team finishes in Excel what the packaged program cannot do.
• You type the same data into more than one system by hand.
• Licence costs climb quickly as the number of users grows.
• Your business model differs from competitors, and that difference gives you an edge.
• You also want to offer your own portal to customers or dealers.

When does an off-the-shelf product make more sense?

If your process matches the rest of your sector, a ready-made product is the sensible choice. For example, Coratlas STK for associations and Coratlas Klinik for clinics are ready-made products. If such a product covers your need, you do not have to build from scratch. As a result, you save both time and budget.

Custom software examples

A few common examples make the idea concrete. Custom software usually takes one of these forms:

• Dealer and customer portal: Dealers place orders, check their balance and download documents.
• Workflow system: Requests move through defined stages, and the system also logs every approval.
• Field app: The team enters visits, counts and deliveries from a phone.
• Integration layer: ERP, accounting and e-commerce systems share the same data.
• SaaS product: You offer your own software idea to customers on a subscription model.

These examples have one thing in common: no packaged product does the same job fully. Therefore the business either bends its process to the software or commissions software that fits the process.

What drives the cost of custom software?

There is no fixed list price in this field, because every project has a different scope. Five factors usually drive the cost:

1. Scope: The number of modules and screens, and the complexity of the business rules.
2. Integrations: How many systems you must connect, and the state of their APIs.
3. Platform: Web only, web and mobile, or a multi-tenant SaaS structure.
4. Data and security: Data migration, permissions and audit log requirements.
5. Maintenance: The response time and development capacity you expect after launch.

For this reason, a serious team runs a requirements analysis before it quotes a price. A figure quoted without analysis usually changes later.

How does a custom software project start?

The first step is to define the problem, not to write code. First, write down which task moves slowly, and why. Then list who does that task and which programs they use. This short preparation makes the first meeting far more productive.

After that, the team runs a requirements analysis and agrees the scope of the first release with you. As a result, a custom software project starts with a small but working piece. Feedback from real use then steers the later stages.

Security and data protection

Any software that processes personal data falls under data protection law, such as GDPR or Türkiye’s KVKK. Therefore encrypted connections, role-based permissions and regular backups are basic requirements. In addition, Türkiye’s Personal Data Protection Authority publishes a guide to technical and administrative measures. Always ask the team about these measures at the proposal stage.

3 common misconceptions

• “Only large companies commission it.” In fact, what matters is how unique the process is, not the size of the company.
• “I build it once, and that is it.” On the contrary, software is a living product and needs regular maintenance.
• “I must define everything up front.” Instead, start with a small first release and then expand.

How do you choose the right software team?

• Does the team analyse first, or quote a price straight away?
• Does it define stages, deliverables and responsibilities in writing?
• Are the maintenance and support terms after launch clear?
• Does the contract also state who owns the source code and the data?

Custom software development with Coratlas

At Coratlas we build enterprise web software, SaaS platforms, mobile apps and integrations. We start with a requirements analysis, and after launch we continue with maintenance and support. The initial analysis meeting is free, and we reply to your request within 1 business day.

For details, see our custom software development page. We also describe each step in our article on the custom software development process.

Frequently asked questions