The decision that saves (or wastes) six figures
Choosing between building custom software and buying an off-the-shelf solution is one of the highest-stakes decisions a growing business makes. Get it right and you unlock a competitive advantage. Get it wrong and you spend a year adapting your processes to someone else's software.
Here's the framework we use with every client who asks.
When to buy off-the-shelf
Your problem is standard. If you need email marketing, CRM, accounting, or project management — tools like HubSpot, Xero, and Asana have spent millions solving these problems. You won't build something better.
Speed matters more than fit. If you need a solution running this month, buying is almost always faster. Custom software takes weeks to months.
You have fewer than 50 users. Small teams rarely need the granular control that justifies custom development. Off-the-shelf tools with good admin panels are usually enough.
You don't have a technical team. Buying means the vendor handles updates, security patches, and infrastructure. Custom software requires someone to maintain it.
When to build custom
Your process IS your competitive advantage. If the way you do things is what makes you better than competitors, forcing that process into generic software dilutes it. Custom software codifies your advantage.
You're paying for 10 features and using 2. When you're working around the software instead of with it — exporting data to spreadsheets, maintaining side processes, or paying for seats and features you don't need — the "cheap" SaaS tool is actually expensive.
You need to integrate deeply. When your workflow spans multiple systems — ERP, payment gateway, warehouse, CRM — and the off-the-shelf tools don't talk to each other, custom integration or a unified platform saves hours of daily manual work.
Data privacy or compliance requires control. If you handle financial data, health records, or sensitive customer information, you may need infrastructure you control — not a third-party SaaS where your data lives on someone else's servers.
You've outgrown the tool. This is the most common trigger. The team has been using spreadsheets or a basic tool for years, and it's now held together with duct tape. The cost of not building becomes higher than the cost of building.
The hidden costs of each option
Hidden costs of buying
- Monthly per-seat fees that scale with your team (€50/user/month × 100 users = €60,000/year)
- Integration costs when the tool doesn't connect to your other systems
- Workflow compromises — you adapt to the software, not the other way around
- Migration pain when you eventually switch (vendor lock-in)
- Feature requests that never get built because you're not their priority customer
Hidden costs of building
- Maintenance: security updates, bug fixes, infrastructure monitoring
- Opportunity cost during the build period
- The risk of scope creep without disciplined project management
- Hiring or contracting technical talent for ongoing support
The hybrid approach
In practice, the best answer is often both. Use off-the-shelf tools for standard operations (email, accounting, HR) and build custom for the core workflow that differentiates your business.
One of our clients runs their finances on a custom platform we built, but uses Google Workspace for email and Slack for communication. Another uses WordPress for their marketing site but has a completely custom ERP for their operations. The tools complement each other.
How to decide: the 5-question test
- Is this a core business process or a support function? Core = consider building. Support = buy.
- Does an existing tool solve 80%+ of the problem? If yes, buy it and live with the 20%. If no, build.
- Will you still need this in 3 years? If yes, the investment in custom is more likely to pay off.
- Do you have the budget for a proper build? Custom done cheaply is worse than off-the-shelf done well.
- Can you maintain it? Either with an internal team or a support partner.
If you answered "build" to 3+ questions, you're likely a candidate for custom software.
Not sure which direction fits your situation? Talk to us — we'll give you an honest recommendation, even if the answer is "don't build."