In short
If your process looks like most companies' (invoicing, accounting, a simple webshop, a basic CRM), off-the-shelf software is usually cheaper and faster. Custom software development pays off when your process is your competitive edge, when you glue several tools together with spreadsheets, or when per-user subscriptions add up to more than your own tool would cost.
For many SMEs the best answer is a mix: ready-made software for the standard parts, and a smaller custom tool where the off-the-shelf product does not fit your process.
A few terms, so we speak the same language
SaaS (Software as a Service). You do not buy or install the software, you pay a monthly fee and use it in the browser. Examples: online invoicing, a CRM, a project management tool.
ERP (enterprise resource planning). A system that runs several parts of the business in one place: stock, purchasing, sales, finance, production. Good for larger companies, but implementation is usually a longer and more expensive project, and many SMEs use only a small part of it.
Custom software. Built specifically around your process. It does exactly what you need, and it is yours: it does not depend on what a vendor decides to build next year.
When is off-the-shelf better?
- The process is standard: invoicing, accounting, payroll, newsletters.
- You need regulatory compliance (for example e-invoicing or tax reporting) that a vendor already handles and maintains.
- You need a standard webshop with ready-made payment, shipping and stock plugins. Shopify or WooCommerce is usually faster and cheaper.
- There are few users and the monthly fee is low.
- You need it tomorrow, with no time to plan.
In these cases custom development is wasted money, and we say so in the first call.
When does custom software development pay off?
1. Your process is your edge. If the way you quote, price or serve clients sets you apart, a ready-made system makes you average. Agrider's photo-based machine valuation tool and leasing calculator, for example, are things no webshop engine does out of the box.
2. You glue tools together by hand. If data goes from a form to a spreadsheet, then to an email, then into another system, and someone copies it by hand, that costs hours every day and creates errors.
3. Per-user fees are expensive. Many SaaS tools charge per user. At 3–5 people that is a good deal. At 20–30 it can be a serious monthly cost.
4. The tool is 80% right, but the missing 20% is what matters. If your team takes the same workaround every day because the system cannot do one thing, count what it costs.
5. You are building your own product. If the software is what you sell (a SaaS product), there is no off-the-shelf system that can be your product. DogDietLab and Vistobi are our own products like this.
Do the 3-year maths
Compare the total cost over at least 3 years, not the first monthly fee.
Off-the-shelf: monthly fee × number of users × 36 months + setup + the time spent on workarounds and manual work.
Custom software: development + hosting and maintenance for 3 years + new features.
An invented but realistic example: 15 people using a tool at €40 per user per month is €600 a month, €21,600 over 3 years, before counting the time spent copying data by hand. If a custom internal tool does exactly what the team needs, development and hosting together can be a fraction of that. If only 3 people would use it, the off-the-shelf tool is almost certainly cheaper.
AI-assisted development has changed this calculation: a custom internal tool now takes weeks, not months, so the development side is smaller too. With us a custom app starts from €2,000, and the details are in this article.
The middle way: off-the-shelf plus a custom add-on
You do not have to replace everything. Often the best setup is:
- Invoicing and accounting stay in the ready-made system.
- A client portal or internal tool is built for your own process.
- An integration connects the two, so nobody copies data by hand.
You do not have to deal with the regulated parts, and the custom part stays small, fast to build and cheaper.
Checklist before you decide
- Can you describe on one page what the system needs to do?
- Have you tried at least two ready-made tools on a free trial?
- Have you counted the hours per month spent on manual copying and workarounds?
- Have you calculated the 3-year cost of the ready-made tool with your real number of users?
- Do you know who will host and maintain the custom software?
- Is there one person in the company who can decide on features during the project?
If you have these answers, a 30-minute call is enough to see which route is better.
Frequently asked questions
Who owns the custom software?
This must be in the proposal: who manages hosting, the domain and the data, and what you receive at the end of the project. We put this in every proposal.
What if the company grows?
With a well-designed data model, custom software can grow: new roles, modules and integrations can be added. That is why we always start with the data model.
Can it replace our ERP?
For an SME, sometimes, if you only use a few ERP modules. More often the ERP stays and the custom software fills the gaps where it is awkward to use.
Further reading
- How much does app development cost in 2026?
- The app development process: from idea to launch
- MVP development: a working first version in weeks
If you are considering custom software, see our custom app development services.