Most articles with this title are a feature list. Virtual DOM, components, hooks, a large ecosystem. None of that is a business case. If you are paying for an application to be built, the question is not whether React has good features — it is what a front-end decision commits you to over the next five years, and what it costs you if it turns out to be wrong.
We build React and React Native applications for a living, so treat this as an interested opinion. That is also why the last section is about when not to use React. An argument with no visible limits is a sales pitch, not an assessment.
A front-end choice looks like a technical decision and is mostly not one. Five things follow from it, and only the last is really about code:
- How easily you can hire people to work on it.
- Whether it will still be maintained when you need it to be.
- How hard it is to replace whoever built it.
- Whether any of the work carries over to mobile.
- Whether it can be fast, and whether search engines can read it.
Here is how React answers each one, including where the answer is weaker than you will usually be told.
1. Can you hire for it in three years?
This is the risk that actually bites, and it bites late. An application built on a technology with a thin talent pool is fine until the person who wrote it leaves — then every change is expensive, slow, or blocked.
React has been among the most widely used front-end libraries in industry developer surveys for roughly a decade. For you that means a deep pool of candidates, a good chance the next agency you talk to already knows it, and juniors arriving already able to read the code. It also means an independent developer can review our work — which is worth more to you than any assurance we could give you ourselves.
The honest caveat: widely used also means widely used badly. A large talent pool is a large pool of highly variable quality, and “we use React” tells you nothing about whether the code is any good.
2. Will it still be maintained?
React was open-sourced in 2013 and is developed and maintained by Meta, which uses it in its own products. That last part is the signal worth paying attention to: the maintainer depends on the thing it maintains. Frameworks backed by a company that does not itself rely on them are the ones that quietly stop receiving attention.
Its track record on breaking changes is also comparatively conservative. Hooks arrived in 2019 as an addition rather than a replacement — code written before them still runs. For an application you expect to own for years, a library that does not force a rewrite every major version is worth more than one with a better feature list.
The honest caveat: Meta’s priorities are Meta’s. The direction of the library follows what a very large company needs, which is not always what a small product needs.
3. Can you replace whoever built it?
Clients consistently underweight this one, and it is the question we would ask first if we were buying. If you stopped working with your current team tomorrow, how hard would this codebase be to hand to someone else?
React helps, but less than people assume — because React is a library, not a framework. It renders your interface and deliberately leaves routing, state, data fetching, forms and project structure to you. Two React codebases can share almost nothing beyond the import at the top of the file.
So “it is built in React” is not by itself a guarantee that anyone can pick it up. What actually makes a codebase portable is conventional structure, boring and widely used dependencies rather than clever ones, and decisions that are written down. This is the point where an agency either protects you or quietly locks you in, and it has very little to do with the framework.
4. Does the work carry over to mobile?
Partly — and this is the claim most often oversold, so it is worth being precise.
React Native shares your language, your tooling, your libraries and your team. It does not share your interface code. A React web application does not become a mobile app for free, and anyone who tells you otherwise is selling something.
What genuinely carries across is everything that is not the screen:
- Validation rules and business logic.
- API clients and the types that describe your data.
- Authentication and session handling.
- The developers, who do not have to learn a second ecosystem.
On most products that is a substantial share of the non-interface code, and the reduction in coordination cost — one language, one set of conventions, one team able to move between web and mobile — is usually worth more than the code reuse itself.
5. Can it be fast, and can Google read it?
Historically this was the strongest objection to React, and it was a fair one. A conventional single-page application sends the browser an almost empty HTML document and builds the page with JavaScript afterwards. That gives you slow first paints, and pages that share badly on social platforms because there is nothing in the HTML to preview.
That problem is solved now, but the solution is architectural rather than automatic. Rendering the page on the server, generating it at build time, or using React Server Components all produce real HTML that arrives complete. The site you are reading is React and Next.js — most of its pages are static HTML carrying a few hundred bytes of page-specific JavaScript.
The honest caveat: choosing React does not give you this. Default client-rendered React still has exactly the old problem. If search traffic matters to your product, the rendering strategy is a question to settle before the build starts, not a setting to switch on near the end.
What React does not give you
- Speed by default. React ships more baseline JavaScript than Svelte or Solid. On a well-built application this is rarely the bottleneck, but it is not free, and on low-end devices it is noticeable.
- Structure. The flexibility that makes React usable everywhere means every team invents its own conventions. Discipline has to come from the people writing it.
- Protection from bad architecture. It is entirely possible to build something slow and unmaintainable in React, and a great deal of software proves this daily.
- A stable ecosystem. React itself changes slowly. The libraries around it do not — state management and data fetching fashions turn over every few years, and each turn is a maintenance decision someone has to make.
When we would tell you not to use React
We sell React work. These are still the cases where we would tell you to choose something else, because taking on a project that should not have been built this way ends badly for both sides.
A marketing or content site
If your site is pages of content with a contact form, React is overhead you will pay for permanently. A static site generator or server-rendered templates will be faster to build, faster to load and cheaper to keep running.
A team already invested in Laravel or Rails
If your engineers are productive in Laravel, adding React often costs more than it returns. Livewire, Inertia or Hotwire will ship the same product with fewer moving parts and one less deployment to think about. We build Laravel backends, so this is a recommendation we actually make rather than a hypothetical.
Strict performance budgets on low-end devices
If you are targeting cheap Android hardware or unreliable networks as a primary constraint, the baseline JavaScript cost is a real factor. Svelte, Solid or server-rendered HTML with light interactivity deserve serious consideration.
A small internal tool
For an admin screen used by a handful of staff, a server-rendered CRUD application will usually ship in a fraction of the time and need almost no maintenance.
How to decide
React is a sound default for an application with real interactivity that you expect to own for years, staff over time, and possibly extend to mobile. That is a genuinely large share of business software — but it is a default, not an answer.
Whoever you hire, these are the questions worth asking. The answers tell you more about the team than the technology does:
- What rendering strategy will you use, and why that one for this product?
- What happens to our search visibility under that choice?
- If we brought in another team in two years, what would make this codebase easy or hard for them?
- What did you choose beyond React — routing, state, data fetching — and what was the reasoning?
- Who owns the repository and the accounts?
A team that answers those clearly is worth more than the framework on the invoice. If you are weighing this decision on a real project, you can read how we approach React web development and how we work, or just tell us what you are building.