Power Apps vs. custom software development: when to choose which for Swiss organisations. Cost, speed, scalability and maintenance comparison. CNEXT – Power Platform specialist Bern.
Microsoft Power Apps builds business applications 3–5× faster than custom development for well-defined use cases within the Microsoft 365 ecosystem. Custom development (using Replit, React, Node.js etc.) provides maximum flexibility for complex, high-scale or proprietary-logic applications.
CNEXT uses both approaches and recommends the right tool per project. Power Apps services | Custom development with Replit | Free assessment →
Choose Power Apps when: the app fits within Microsoft 365 data (SharePoint, Dataverse), users are <500, UI requirements are standard (forms, lists, dashboards), the business can tolerate Power Apps licensing costs and fast time-to-value (weeks vs. months) is important. CNEXT recommends Power Apps for 70% of Swiss SMB business app requests.
Custom development wins when: app requires non-standard UI/UX (mobile-native, highly interactive), data volumes exceed Dataverse limits (100M+ rows), logic is highly complex and difficult to express in Power Fx, the app needs to run without Microsoft 365 infrastructure or long-term maintenance cost of Power Apps licences exceeds custom app hosting.
For typical business apps, Power Apps is 40–60% cheaper to build initially (faster dev, no infrastructure). Custom development has lower long-term licensing cost (no Power Apps Premium per user). CNEXT builds a 5-year TCO model: build cost + licence cost + maintenance. The breakeven is typically at 100–200 users and 3 years.
For typical internal business apps (forms, list views, approval workflows) with <500 concurrent users, Power Apps performance is adequate. Canvas apps on SharePoint lists perform well for <50,000 rows. For high-frequency, high-concurrency or real-time apps, custom development with a proper backend is recommended.
Power Apps limitations: data row limits for non-delegable queries (500 by default, 2,000 with delegation), formula complexity limits in Power Fx, canvas app complexity (performance degrades >100 screens), limited offline capability compared to native mobile apps and dependency on Microsoft 365 licensing.
The data (in SharePoint or Dataverse) can be migrated, but the app UI/logic needs to be rebuilt. CNEXT recommends building Power Apps for initial validation (MVP) and planning a custom development phase if the app proves successful and outgrows Power Apps limits. This 'Power Apps MVP → Custom' pattern saves cost in the early stage.
Yes. CNEXT uses Replit Enterprise for rapid custom app development: React front-ends, Node.js backends, PostgreSQL databases and Microsoft 365 API integration. Custom apps are deployed to Azure App Service or Azure Container Apps with Swiss data residency.
Power Fx is Power Apps' formula language, similar to Excel formulas but with data query and control flow capabilities. It is not a general-purpose programming language: no loops, no async/await, limited error handling. For simple business logic it is sufficient; for complex logic, Power Automate (for workflow) or custom code (for algorithms) is needed.
Microsoft has improved Power Apps accessibility: screen reader support (NVDA, JAWS, Narrator), keyboard navigation and colour contrast compliance in the default theme. CNEXT builds accessible canvas apps following WCAG 2.1 AA guidelines. Fully accessible Power Apps require careful design – CNEXT includes accessibility testing in every project.
CNEXT implements Power Platform governance: environment strategy (Development / Test / Production), DLP policies (approved connectors list), Application Lifecycle Management (ALM) with Azure DevOps, naming conventions, Canvas App inventory and the Center of Excellence Starter Kit for usage monitoring. Without governance, citizen developer apps proliferate unmanaged.