Every "Blazor vs. React" article ends the same way: "it depends on your needs." Thanks. Very helpful. You could have told us that before we scrolled past four thousand words of feature bullets.
So let's do it differently. Here's what each framework actually is, where each one falls down, and a short list of questions that will make the decision for you.
What Blazor Actually Is
Blazor is Microsoft's framework for building interactive web UIs in C# instead of JavaScript. You write components in Razor - HTML with C# mixed in - and Blazor handles turning that into a working app.
The pitch is simple: if your team already lives in .NET, you can build the front end in the same language, share models between client and server, and skip the context-switch to JavaScript entirely.
Blazor ships in a few flavors, and this is the part beginners get wrong. Blazor Server runs your component logic on the server and streams UI updates to the browser over a live SignalR connection. Blazor WebAssembly compiles your C# to WebAssembly and runs it fully in the browser. Newer .NET versions let you mix both and even prerender on the server, choosing the render mode per component.
That flexibility is real, but it comes with a catch. Blazor Server feels instant on a fast connection and sluggish on a bad one, because every click is a round trip to the server. Blazor WebAssembly has no round-trip latency, but the browser has to download a .NET runtime first, so the initial load is heavier. There is no free lunch here - you're picking which trade-off you'd rather explain to a client.
What React Actually Is
React is a JavaScript library for building UIs out of components. It's been the default choice for front-end work for over a decade, and that longevity is the whole story.
You describe what the UI should look like for a given state, React figures out the minimal set of DOM changes to get there, and you mostly stop thinking about the DOM. Data flows one direction, top down, which makes bugs easier to trace than the tangled two-way binding of older frameworks.
React by itself is small - it's just the view layer. Everything else (routing, data fetching, server rendering) comes from the ecosystem around it. In practice most teams don't reach for raw React anymore; they reach for a framework built on top of it, like Next.js, which handles routing, server rendering, and bundling out of the box.
That ecosystem is React's real advantage. Whatever weird thing you need - a date picker, a charting library, a drag-and-drop grid - someone has already built it, documented it, and answered a hundred Stack Overflow questions about it. Blazor's community is growing, but it is nowhere near that deep.
The Honest Comparison
Language. Blazor is C#. React is JavaScript or TypeScript. This is the single biggest factor and it's usually decided before you even start - by what your team already knows.
Performance. Both are fast enough for the vast majority of apps. React's rendering model is battle-tested at massive scale. Blazor WebAssembly is fast once it loads; Blazor Server is fast until the network hiccups. If you're building something where a 50ms lag on every interaction is a dealbreaker, that matters. For most business apps, it doesn't.
Hiring and help. When you get stuck at 2am, React has a decade of tutorials, forum posts, and libraries waiting for you. Blazor has good official docs and a smaller, friendlier community. When you go to hire, there are far more React developers on the market than Blazor ones.
Ecosystem maturity. React's third-party ecosystem is enormous and occasionally exhausting. Blazor's is smaller and more curated, and you'll sometimes have to build something yourself that would be a one-line npm install in React.
Just Answer These Questions
Skip the feature matrix. Answer these instead:
- Is your team already a .NET shop? If yes, and you want to move fast without learning a new language, Blazor is a legitimately great choice. Don't let anyone talk you out of it because it's "less popular."
- Do you need to hire front-end developers soon? The React talent pool is much larger. That's a business fact, not a technical one, and it's often the deciding vote.
- Do you depend on a lot of third-party UI components? React's ecosystem will save you weeks. Blazor may make you build things by hand.
- Is this a public marketing site or a rich internal app? For content-heavy, SEO-sensitive public sites, the React ecosystem (via Next.js) has a well-worn path. For internal line-of-business tools inside a Microsoft stack, Blazor is a natural fit.
The Actual Answer
There is no wrong choice here, only a wrong process. Both frameworks build great modern apps. The teams that regret their pick are the ones who chose based on a benchmark or a blog post instead of their own reality - their skills, their hiring plan, their existing stack.
Pick the one that fits the team you have and the app you're actually building. Then stop reading comparison articles and go ship something.
We've built plenty on both. If you'd rather hand the decision - and the build - to a team that's shipped 100+ products since 2016, that's what we do. Otherwise, you've got everything you need to choose. Go.