Power Apps Development: When to Build an Internal Tool Instead of Buying Software
A clear test for when a custom Power App beats off-the-shelf software, and when it does not. Practical guidance for Australian operations teams.
The build versus buy question comes up on almost every internal tool. Buy something off-the-shelf and you get fast setup but a fixed shape. Build a custom Power App and you get exactly your process but you own it for life. Most teams pick on instinct. Here is the test we use to pick on evidence.
The real cost of off-the-shelf
Packaged software looks cheaper because the price is on the website. The hidden cost shows up later, when your process does not fit the product. You end up changing how your team works to suit the tool, paying for seats you do not use, and stitching the product to your other systems through exports and manual steps. None of that is on the pricing page.
When a custom Power App wins
- The process is specific to how your business runs and gives you an edge.
- It spans systems you already use, like SharePoint, Teams, and Dataverse.
- The rules change often, and you need to change them without a vendor release.
- You want the data to stay inside your own Microsoft 365 tenant.
When to buy instead
Buying is the right call when the job is generic and someone has already solved it well. Accounting, payroll, and email are bought, not built, because the market product is mature and the process is standard. If a tool fits your process out of the box and you would not gain anything from owning it, buy it and move on.
The test we use
Is this process a source of advantage, and does it touch systems you already own? If both are yes, build it. If the process is generic and a mature product already fits, buy it. If you are unsure, start with a small Power App on top of the Microsoft 365 you already pay for and see if it earns its place.
The middle path most teams miss
Power Apps often turns the question into a false choice. Because it sits on the Microsoft 365 licences you already hold, a custom internal tool can cost far less than a new software subscription, while fitting your process exactly. That is why we reach for it first for internal tools that span Microsoft systems.
Where to go next
See our Power Apps development service for how we scope and build these. If you are weighing automation more broadly, our guide to Power Automate consulting explains how an engagement runs, or book a strategy session.
Have a process worth automating?
Book a strategy session. We will find the real driver, tell you honestly what we would do about it, and show you the numbers.