Power Apps, SaaS, or Custom Build? A Self-Assessment for Business Leaders

Why the choice matters

Picking the wrong application approach costs more than the initial investment. A SaaS product that needs constant workarounds drains staff time. A custom build that was not needed ties up budget and delivery capacity. A Power Apps solution that outgrows its limits forces an expensive re-platform.

The assessment above evaluates ten factors that consistently determine which approach delivers the most value. It takes about three minutes and provides an instant, expert-backed recommendation.

What the assessment covers

The ten questions are grouped into three areas.

Existing technology

Your current IT capability and cloud maturity shape what is realistic. An organisation with no internal development capability will get more value from SaaS or Power Apps in the short term. A team with advanced engineering capability can take full advantage of custom build.

Cloud maturity also matters. Applications should be cloud-native regardless of approach, but your current cloud journey affects how quickly each option can be implemented and integrated.

Application requirements

These questions cover the practical constraints of your project:

• Timeline. How urgently do you need the application live? SaaS and Power Apps are faster to deploy. Custom build requires discovery, development, and testing, though AI-augmented delivery has compressed these timelines significantly.
• Uptime and SLAs. Mission-critical applications with zero-downtime requirements need a different architecture and support model than internal tools with flexible availability.
• Audience. Staff-only tools have different UX and security requirements than customer-facing or multi-audience applications. Customer-facing applications benefit from a user interface layer that hides the backend, making future migrations easier.
• Lifespan. A tool needed for under a year has a very different cost profile than a system expected to run for five years or more.

Application preferences

The final questions capture your priorities around innovation, security, user experience, and ownership:

• Innovation pace. If your business needs to iterate rapidly, custom build offers the most flexibility. SaaS roadmaps are set by the vendor, not by your priorities.
• Security and compliance. Organisations with stringent industry requirements (financial services, healthcare, government, education) often need the control that custom build provides. SaaS and Power Apps rely on the vendor’s security posture, which may not meet your specific standards.
• User experience. Custom build is the only route to fully bespoke user journeys. SaaS and Power Apps offer templates and configuration, but not pixel-level control.
• Ownership. Do you need to own the source code and IP? Custom build gives you both. SaaS gives you neither. Power Apps sits in between, with limited portability.

How the scoring works

Each question has four options. Every option carries a weighted score across all three approaches (Power Apps, SaaS, and Custom Build). Your answers accumulate across all ten questions, and the tool calculates a percentage fit for each approach.

The approach with the highest percentage is your primary recommendation. The percentages for the other two approaches show how close the alternatives are. A narrow margin (e.g. 38% vs 35%) means the decision is genuinely close and warrants deeper investigation. A wide margin (e.g. 55% vs 22%) suggests a clearer direction.

Understanding your results

Power Apps

If Power Apps scores highest, your current situation favours speed and simplicity over long-term flexibility. Power Apps is a practical starting point when:

• Your internal IT capability is still developing
• The application is for internal staff use
• The expected lifespan is under three years
• You need to explore requirements before committing to a larger investment

Be aware of the limitations. Power Apps struggles with complex business logic, deep integrations, and strict compliance requirements. If your needs evolve, expect to migrate to a custom build later. Plan for that possibility from the start.

SaaS

A SaaS recommendation means your requirements are well-served by existing products on the market. SaaS works well when:

• The function is a commodity (well-understood, mature market)
• You need to be live quickly
• Your requirements match standard product features
• Long-term ownership of source code is not a priority

Before committing, evaluate the total cost of ownership. Include integration work, training, process adaptation, and workaround costs. Check data residency policies and contract terms carefully. A detailed SaaS evaluation framework can help you assess specific products.

Custom Build

A custom build recommendation means your requirements, audience, security needs, and long-term plans justify the investment in bespoke software. Custom build is the right path when:

• The application is customer-facing or serves multiple audiences
• You need full control over user experience and data
• Security and compliance requirements are stringent
• The expected lifespan is five years or more
• You want to own the source code and IP

With AI-augmented delivery, custom build is faster and more cost-effective than traditional approaches. A discovery phase (2-4 weeks) gives you a clear scope, architecture, and cost estimate before committing. See our custom software development service or pricing for details.

What to do next

1. Take the assessment at the top of this page. Be honest about your current situation, not where you hope to be in a year.
2. Review the recommendation in context. The assessment gives you a starting point. Your specific constraints (budget, regulatory requirements, team capacity) should inform the final decision.
3. Explore related guides. If you scored towards custom build, read our build vs buy decision framework. If SaaS scored well, our SaaS replacement guide helps you evaluate whether your current tools are still the right fit. If legacy systems are involved, start with signs your legacy system is costing more than you think.
4. Book a consultation to discuss your results with one of our team. We will give you an honest assessment of which approach fits your situation, including whether you need us at all.