The question comes up in nearly every discovery call: "Should we buy something or build it?" There's no universal answer, but there is a consistent framework for thinking it through.
The Default Should Be "Buy"
Custom software is expensive to build and expensive to maintain. Unless you have a compelling reason to build, you should default to using existing tools. Notion, HubSpot, Jira, Stripe, and thousands of other products exist because they solve common problems well.
The trap is thinking that because your business is unique, your tools need to be unique too. Your CRM being custom doesn't give you a competitive advantage — your customer relationships do.
Three Signals That Point Toward Custom
1. The off-the-shelf tool is 80% right, but the 20% gap creates daily friction.
If your team has built elaborate workarounds inside a SaaS product — custom fields that hack the data model, Zapier chains that feel fragile, manual steps that exist because the automation doesn't quite work — the tool is costing you more than you think. A targeted custom solution that does exactly what you need can be cheaper than the ongoing overhead of fighting the wrong tool.
2. The process is a core differentiator.
If how you operate is your competitive advantage, you don't want a generic tool built for hundreds of industries. A specialised freight broker, a bespoke furniture maker, a niche financial services firm — their workflows are genuinely different, and that difference is where their margin comes from. Custom software codifies that advantage.
3. Data ownership and integration are non-negotiable.
SaaS tools own your data in their format, on their terms. When you need deep integration with your own systems — or when regulatory requirements demand you control where data lives — custom software gives you that control.
The Total Cost Calculation
When comparing options, the honest calculation looks like this:
| Cost Category | Off-the-shelf | Custom |
|---|---|---|
| Initial setup | Low | High |
| Monthly licensing | Ongoing | Minimal |
| Customisation ceiling | Hard limit | None |
| Maintenance burden | On vendor | On you |
| Switching cost | High (data lock-in) | Moderate |
Custom software typically breaks even at year 2–3 for mid-sized businesses. Before that window, buy. After that window, the economics often favor custom.
A Hybrid Approach
For most businesses we work with, the right answer is neither fully off-the-shelf nor fully custom. It's a thin custom layer — usually an internal tool or integration service — that connects existing SaaS products and fills the specific gaps your team keeps tripping over.
This is often the best value: the breadth of mature SaaS platforms, combined with the precision of custom code exactly where you need it.
Not sure which category your situation falls into? Talk to us — we'll tell you honestly whether it's worth building, even if that means we don't get the project.
