Where custom software is the right answer
Custom software earns its cost when the workflow is genuinely novel, when the competitive differentiation is embedded in the software, or when the regulatory and integration requirements are too specific for commercial products to handle without costly customisation that effectively becomes custom development anyway.
Healthcare has several classes of problem that routinely meet these criteria:
- Specialty-specific clinical workflows where the domain logic is precise enough that generic clinical workflow tools cannot represent it without significant configuration that breaks on every version update.
- Population health programmes with specific data collection, risk stratification, and outreach logic that reflects a care model the organisation has developed — and that a commercial platform would flatten into a generic template.
- Interoperability bridges between systems that commercial vendors have no incentive to connect. The FHIR specification helps, but real-world HL7 environments contain enough non-standard implementations that custom integration code is often unavoidable.
- Patient-facing digital products where the experience is part of the clinical proposition. A portal that looks like every other portal is not differentiating care — it is meeting table stakes.
The threshold for custom work in these areas is lower than it seems, because the alternative is not a commercial product that fits — it is a commercial product that requires so much configuration and customisation that it stops being a product and starts being a project anyway.
Where custom software is the wrong answer
Custom software is the wrong answer for commodity healthcare functions — billing, scheduling, basic EHR documentation, HR systems for clinical staff. These functions are well-understood, commercially served, and carry compliance requirements that commercial vendors have already absorbed. Building them from scratch is expensive, slow, and saddles the organisation with maintenance obligations that commercial vendors spread across hundreds of customers.
It is also the wrong answer for teams that do not have — and cannot build — the engineering capacity to maintain what they build. Custom software that cannot be maintained becomes technical debt that limits clinical flexibility over time.
The other failure mode is building custom software for a problem that has matured commercially since the build decision was made. Healthcare IT is moving fast. A custom solution that was ahead of the market in 2018 may be behind a competitive commercial product in 2024. The build/buy calculus needs to be revisited, not locked in.
The honest framework
The question is not "should we build custom software?" The question is: what is the constraint, and which option — custom, commercial, or configured — removes it faster at lower risk?
Four questions frame most decisions honestly:
- Is the required capability available commercially at acceptable quality? If yes, the burden of proof is on the custom build to justify the investment and maintenance obligation.
- Is the workflow genuinely differentiated, or does it feel differentiated because no one has mapped it to existing tools? Most workflows are more mappable to commercial products than they appear before the mapping exercise is done.
- Who will maintain the custom system in three years? If the answer is unclear, the maintenance cost is being hidden, not avoided.
- What is the cost of being constrained by the wrong choice? In high-volume clinical environments, a platform that cannot scale or adapt is a patient care risk — not just an IT inconvenience. The cost of being wrong is not symmetric between build and buy.
The organisations that get this right are the ones that do the mapping exercise honestly before the build decision — not after the contract is signed.