React or Angular: what the decision is really about
Anyone commissioning a business application or a customer portal soon faces the question of which technology the user interface will be built with. The two names mentioned most often are React and Angular. Both originate from large companies (React from Meta, Angular from Google), both have been in use for more than ten years, both are developed continuously and both are released under the MIT licence, so neither causes licence fees.
For you as the client, the question is less technical than it sounds. The interface is the part of the application your staff or customers see and operate every day, and it is the part that changes most often. The choice of framework therefore determines who will still be able to maintain the application in five years, how easily a new developer finds their way in and how well the application fits into what already runs in your company. This guide explains the differences so that you can follow a provider’s reasoning and ask the right questions.
What React and Angular have in common
The similarities outweigh the differences, which is reassuring for your decision:
- TypeScript: in practice both are written in TypeScript, an extension of JavaScript that catches errors at compile time rather than in front of the user. Angular has required it from the start; with React it has become the standard. For maintainability over years this matters more than the choice between the two frameworks.
- Components: both break the interface down into reusable building blocks such as a form field, a table or a dialog. Once built, a block is used in many places and a change in behaviour is made once.
- Long-term maintenance: both receive regular releases with documented upgrade paths. An application built today can still be updated with either in ten years, provided it is kept current along the way.
- Adoption: for both there are enough developers, training, libraries and tools. Neither is a niche you will be stuck in.
- Accessibility and performance: both allow accessible, fast applications. Whether an application ends up accessible and quick depends on the implementation, not the framework.
So if a provider sells you one of the two as fundamentally superior, be sceptical. The factual case lies in your company’s environment.
How they differ for clients
Angular: a complete framework with fixed rules
Angular ships with everything an application needs: building the interface, navigating between screens, forms with validation rules, communication with the server, testing. For each of these tasks there is exactly one intended way. An Angular project therefore looks much the same in one company as in another.
For you this means that a new developer who knows Angular finds their way around your application quickly because the structure is prescribed. Several developers work by the same rules without negotiating them each time. The price is more scaffolding: even a small application carries the full framework, and deviating from the conventions is costly.
React: a library with a freely chosen environment
React handles building the interface and little else. Navigation, forms, data handling and server communication are added from libraries the development team selects. The result is lean applications that contain exactly what is needed and embed easily into existing pages or portals.
For you this means the application stays lightweight and adaptable, but its structure depends more on who built it. Two React projects can be organised very differently. Whether a later developer copes well depends on the documentation and discipline of the first team. A reputable provider therefore records the chosen libraries and conventions in writing.
Decision criteria for your company
Work through the following points. Usually the direction becomes clear after the first three.
- Existing knowledge in-house: do you have developers or an IT department already using one of the two? Then that is almost always the right choice, even if the provider prefers the other. At some point your people should maintain the application or at least understand it.
- Team size and turnover: the more people work on the application and the more often they change, the more Angular’s prescribed structure pays off. A small, stable team does just as well with React and a few well-documented rules.
- Integration into what exists: if the application is to become part of an existing website, customer portal or content management system, React is usually the easier choice because individual components can be dropped into foreign pages. A standalone application with its own window is equally feasible with both.
- Lifetime and maintainability: for applications meant to run ten years or longer, what counts is whether the structure stays understandable without the original team. Angular prescribes that; with React it has to be agreed. Both work if taken seriously.
- Availability of developers: both are widespread. The market can differ by region and industry, though; ask your provider whom they would deploy as a substitute.
- Licence and dependency: both are MIT-licensed. There are no fees, no lock-in to particular vendors and no restrictions on use. Any dependency is on the provider, not the framework, so handing over the source code should be part of every contract.
- Accessibility and performance: since 2025 the German Accessibility Strengthening Act requires accessible interfaces for many consumer-facing services. Both frameworks allow this; make it a requirement rather than expecting it from the framework. The same applies to load time.
Conclusion by project type
The criteria translate into typical projects in mid-sized companies:
- Internal business application with a larger team or long lifetime: Angular. Order control, planning and approval processes maintained by several developers over many years benefit from fixed conventions. If your company already uses React, stay with React.
- Customer portal: both are suitable. If the portal is to be embedded in an existing website or CMS, that favours React; if it is a standalone application with many forms and roles, Angular. What a customer portal needs beyond the framework is covered in the guide on developing a customer portal.
- Extension of an existing website: React. A configurator, calculator, search or form inside an existing TYPO3 or WordPress site is considerably easier to deploy with React.
- Small tool for one department: React. Angular’s full framework is not worth it for an application with three screens. If the tool later grows into a business application, the structure can be tightened.
The interface is only one half. The other is the connection to ERP, accounting or CRM, which is built independently of the framework; see the guide on commissioning an ERP interface.
What should not decide
- Trends and popularity: which framework is mentioned more often right now says nothing about what suits your company. Both will still be maintained in ten years.
- The provider’s preference alone: that a provider masters one of the two better is a legitimate reason, but only if it matches your criteria. They should justify the proposal with your environment, not theirs.
- Isolated performance comparisons: benchmarks between the two are meaningless for business applications. Load time is decided by data volume, images and server communication, not by the framework.
- Which one is more modern: both are renewed at short intervals. What matters is that the application is updated continuously, not which version it started with.
How a provider should justify the choice
A sound recommendation refers to your situation and can be summarised in a few sentences: “You have no in-house development, the application should run for ten years and be maintainable by changing providers, therefore Angular.” Or: “The application will be embedded in your existing portal and maintained by a small team, therefore React with these specified libraries.”
Questions you should ask:
- Which criteria from my company led to this recommendation?
- Which additional libraries are used and who decides on replacing them?
- How is the structure documented so that another developer can take over the application?
- How are framework updates scheduled, at what intervals and on what terms?
- Do I receive the complete source code and documentation on completion?
- Who stands in for the responsible developer in case of absence?
A provider who answers these questions clearly has not made the choice out of habit. RLOX uses both frameworks and bases the choice on the customer’s environment; the technology section of the custom software development page (in German) describes how.
