Every organisation building internal tools eventually hits this question: should we use Power Apps, or build something properly with a development team? The Microsoft sales pitch makes Power Apps sound like the answer to everything. The developer community often dismisses it entirely. The truth, as usual, is more nuanced and more context-dependent.
Here's a clear-eyed comparison based on building both.
Power Apps is a low-code application platform that lets you build functional apps without writing much (or any) traditional code. Canvas apps give you full visual control over the layout. Model-driven apps generate UI automatically from a data structure. Both connect natively to Microsoft 365, SharePoint, Dataverse, and hundreds of other systems via connectors.
What it isn't: a full development platform. It has constraints on data volume, UI complexity, and what's achievable without workarounds. For simple-to-medium complexity business apps, those constraints rarely matter. For complex transactional systems or consumer-facing products, they do.
Rather than debating abstractions, here are the questions that actually determine which approach is right:
Power Apps is an internal tool platform. It's built for employees inside your Microsoft 365 environment, specifically people with work accounts who can be licensed. If you're building something for customers, partners, or the public internet, Power Apps is the wrong tool. If it's internal, it's a serious contender.
Power Apps works well for apps built on SharePoint lists or Dataverse tables, covering simple-to-moderate relational structures. If your app requires a highly complex relational database with hundreds of tables, complex stored procedures, or very high transaction volumes, a traditional backend is more appropriate. Most internal business apps don't need this.
This is often the deciding factor. A Power Apps solution built on SharePoint can be delivered in 2–4 weeks. The equivalent custom-built application takes 3–6 months. The cost difference is significant, sometimes 5–10x. For internal tools, the business case for Power Apps is often overwhelming if the functionality fits within its constraints.
Custom-built apps require developers to maintain them. Power Apps can be maintained by a trained business analyst or a power user, someone who understands the business process and can make changes without a development ticket. For many organisations, this operational advantage outweighs the technical limitations.
| Factor | Lean toward Power Apps | Lean toward custom dev |
|---|---|---|
| Users | Internal employees | External / customers / public |
| Timeline | Weeks | Months is acceptable |
| Budget | Limited | Significant investment available |
| Data volume | Thousands to low millions | Very high volume / complex queries |
| UI requirements | Functional, standard forms | Highly custom, brand-critical |
| Maintenance | Business users can own it | Developer team will maintain |
| Microsoft 365 | Already using it | Non-Microsoft environment |
Increasingly, the right answer isn't either/or. We regularly build systems where Power Apps handles the front-end (data capture, approvals, dashboards) while a backend built in Python, .NET, or Azure Functions handles the heavy processing. This combines Power Apps' speed-to-build advantage with the flexibility of proper backend development where complexity warrants it.
The worst outcome is spending six months and a significant budget on custom development for an internal approval workflow that Power Apps could have delivered in three weeks. The second worst is trying to build a customer-facing product in Power Apps and fighting the platform's constraints for months.
Get the choice right upfront and everything else follows.
Not sure which approach fits your project? Talk to us. We build both and will give you an honest recommendation based on your actual requirements.