Which web UI framework will you choose in 2026: React, Angular, Vue, Svelte, Blazor, or HTMX?

Kickoff meeting for a new SaaS. The backend has long been decided: ASP.NET Core, EF Core, SQL Server. Then someone asks the question that breaks the silence: “And what do we use on the frontend?”

In the next 40 minutes, you hear all possible arguments. “React, because everyone knows it.” “Blazor, because we are a .NET team.” “Angular, because it’s for enterprise.” “I read that Svelte is the fastest.” No one is completely wrong. But no one answers the right question, because the question asked is wrong.

There is no “best UI framework.” There is the right framework for what you are building, who is building it, and how long it will need to be maintained. This article is the first in a series about choosing UI technology and deals strictly with the web. Desktop and mobile will come in the next articles.

First, the map: four families of web frameworks

The list of web frameworks is long, but almost all fall into four families. If you understand the families, the choice becomes much simpler than it seems.

1. JavaScript libraries and component frameworks — React, Angular, Vue, Svelte, plus niches like SolidJS, Preact, Lit, or Qwik. The UI runs in the browser, and your backend becomes an API.
2. Meta-frameworks — Next.js and React Router (formerly Remix) on top of React, Nuxt on Vue, SvelteKit on Svelte, Analog on Angular, plus Astro, which is a special case. They add server-side rendering, file-based routing, data loading, and optimized deployment.
3. Web UI in C# — Blazor, in all its rendering modes. Components written in Razor and C#, without being forced to write JavaScript.
4. Server-driven HTML — Razor Pages or MVC, often combined with HTMX. The server generates HTML, and interactivity comes from dynamically changed HTML fragments, not from a full JavaScript application.

The fundamental difference between them is not syntax. It is where the UI state lives: in the browser (families 1 and 2, plus Blazor WebAssembly), on the server (Blazor Server, Razor + HTMX), or mixed (meta-frameworks and Blazor Auto). Almost all other decisions follow from this: latency, hosting costs, SEO, complexity, and who can work on the code.

The same component, five frameworks

Before comparisons, it’s worth seeing how the same simple thing, a button that counts clicks, looks in each of them. It doesn’t tell everything, but it says a lot about each philosophy.

React

import { useState } from "react";

export function Counter() {
  const [count, setCount] = useState(0);
  return <button onClick={() => setCount(count + 1)}>Clicks: {count}</button>;
}

Angular (standalone, with signals)

import { Component, signal } from '@angular/core';

@Component({
  selector: 'app-counter',
  template: `<button (click)="count.update(c => c + 1)">Clicks: {{ count() }}</button>`
})
export class Counter {
  count = signal(0);
}

Vue

<script setup>
import { ref } from 'vue'
const count = ref(0)
</script>

<template>
  <button @click="count++">Clicks: {{ count }}</button>
</template>

Svelte 5

<script>
  let count = $state(0);
</script>

<button onclick={() => count++}>Clicks: {count}</button>

Blazor

@rendermode InteractiveServer

<button @onclick="() => count++">Clicks: @count</button>

@code {
    private int count;
}

React is JavaScript mixed with HTML (JSX) and lets you decide almost everything else yourself. Angular is a TypeScript class with decorators, services, and dependency injection, so a structure that will feel familiar to a .NET developer. Vue and Svelte emphasize as little ceremony code as possible. Blazor is pure C#, and the @rendermode line already shows you that the choice doesn’t end at “Blazor”: you also have to decide where the component runs.

React: the largest ecosystem, with all decisions on your shoulders

React is the clear market leader, and this has practical consequences: for any problem, there is already a library, a tutorial, and an answer on Stack Overflow. UI components (shadcn/ui, MUI, Mantine), state management, forms, charts, editors: the ecosystem is huge.

The price is decision fatigue. React is a component library, not a complete framework. Routing, data loading, forms, and state management are decisions you have to make, and recommendations change every few years. Moreover, modern React is increasingly designed around a meta-framework: Server Components, server actions, and React Compiler, which automatically performs some optimizations previously written manually with useMemo and useCallback. If you use “plain” React with Vite, everything works excellently. But you remain outside the direction in which the ecosystem evolves.

Choose React when: you are building a public product with a rich UI, need specialized libraries (editors, canvas, complex visualizations), want to hire easily, or already have a dedicated frontend team.

Angular: complete, opinionated framework surprisingly familiar for .NET

Angular is the opposite of React in philosophy. It comes with everything: routing, forms, HTTP client, dependency injection, testing, CLI. Usually, there is only one correct way to do something, and for large teams, this is a quality, not a limitation. A new developer looks at any Angular project and immediately orients themselves.

For those coming from .NET, Angular has a rarely discussed advantage: the mental model. Services injected in the constructor (or with inject()), strict TypeScript, clear separation between components and logic. It resembles ASP.NET Core more than any other JavaScript framework.

The reputation of a heavy framework largely comes from the NgModules and zone.js era. Angular has been rebuilt in recent years around standalone components and signals, and starting with version 21, new applications are zoneless by default. Change detection no longer depends on zone.js but on signals. Also from version 21, Vitest became the default test runner, and Signal Forms appeared as an experimental API.

Choose Angular when: you have a large, long-term business application with many screens, complex forms, and multiple teams working on the same code. Enterprise applications, back offices, and B2B portals are its natural terrain.

Vue: the middle way, with the gentlest learning curve

Vue sits between React and Angular. It is more structured than React (it has an official router and state management, Pinia) but easier than Angular. Single-file components, with template, script, and style in the same file, are probably the most readable component format on the list.

An interesting direction is Vapor Mode, a compilation mode without a virtual DOM. However, at the time of writing this article, Vapor Mode is complete in functionality but still in release candidate on the 3.6 line, and the stable version remains 3.5. So it is a promise for the future, not a production argument today.

Choose Vue when: the team is small or mixed, you want fast productivity without all the Angular apparatus, or you want to gradually add interactivity to an existing server-rendered application. Vue was designed from the start for this scenario as well.

Svelte and the rest: for performance and your taste

Svelte compiles components into JavaScript that directly modifies the DOM, without a heavy runtime. The result: small bundles and very concise code. Svelte 5 introduced runes ($state, $derived, $effect), an explicit reactivity model, much easier to follow in large applications than the magic from previous versions. With SvelteKit, you also have a complete meta-framework.

The real limitation is not technical but ecosystem and market: fewer libraries, fewer people to hire. For a small team controlling the entire stack, Svelte is an excellent choice. For a department hiring 20 frontend developers a year, it is a risk.

In the same niche area, you should know about:

• SolidJS — syntax similar to React, fine reactivity based on signals, top performance.
• Preact — a React alternative of a few KB, useful for widgets or pages where every kilobyte counts.
• Lit — for standard Web Components. It is ideal for design systems that must work in applications built with different frameworks.
• Qwik — built around the idea of resumability: the page becomes interactive almost without executing JavaScript on load. Interesting for e-commerce but with a small ecosystem.

Meta-frameworks: when an SPA is no longer enough

A classic SPA sends the browser an empty HTML and a JavaScript bundle, then builds the page on the client. For an internal application behind a login, this is perfect. For a public page that must be indexed by Google and appear quickly on a mid-range phone, it is a problem.

Meta-frameworks solve the problem by rendering on the server, then “hydrating” the page in the browser. Next.js dominates in the React world, Nuxt in the Vue world, and SvelteKit and Analog do the same for Svelte and Angular respectively.

A special place is occupied by Astro. It starts from the idea that most content pages are static, and interactivity should be added only where needed, in “islands.” You can use React, Vue, or Svelte components on the same page, and the rest goes to the browser as clean HTML. For blogs, documentation, and presentation sites, Astro is hard to beat.

The cost of meta-frameworks is that the frontend also becomes a server. You need Node.js (or an edge runtime) in production, and your application turns into a system with two backends: ASP.NET Core for the API and Next.js for rendering. For a .NET team, this is a real operational complexity that must be weighed.

Blazor: C# all the way to the browser, but with its own decisions

For a .NET team, Blazor has a hard-to-match argument: one language and one ecosystem. The same DTOs, the same validation rules, the same libraries, the same debugger. No separate npm pipeline, no duplicate API contracts in TypeScript.

But “we chose Blazor” is not a complete decision. Modern Blazor (Blazor Web App, from .NET 8 onwards) has multiple rendering modes, each with a different profile:

• Static SSR — HTML rendered on the server, without permanent interactivity. It resembles Razor Pages but uses the Blazor component model.
• Interactive Server — the component runs on the server, and events and updates flow through a SignalR connection. It starts instantly and has direct access to the database, but each user occupies memory on the server, and network latency is felt on every click.
• Interactive WebAssembly — the .NET runtime runs in the browser. It scales excellently and works offline, but the first load is heavier than in a JavaScript framework.
• Interactive Auto — starts on the server and switches to WebAssembly after the runtime has downloaded in the background. It is the best of both worlds but with the complexity of both.

The most important quality of the current model is that you can choose the mode per component: static public pages, an interactive server dashboard, a heavy editor on WebAssembly. And .NET 10 has eliminated some known pains: the base script is much smaller, WebAssembly resources preload, and component state can be persistently declared between prerendering and interactive rendering, so the page no longer “flashes” by reloading data.

The weaknesses remain real. The component ecosystem is solid (MudBlazor, Radzen, Fluent UI Blazor, plus commercial suites Telerik and Syncfusion), but it is a fraction of React’s. The hiring market for Blazor is smaller. And Blazor Server, however convenient, is not a good choice for public applications with thousands of simultaneous users on unstable mobile connections.

Choose Blazor when: the team is predominantly .NET, the application is a business one (SaaS B2B, back office, internal portal), and the value of reusing C# code outweighs the value of the JavaScript ecosystem. For internal applications on a corporate network, Interactive Server is probably the most productive way to deliver UI from this entire article.

Razor Pages + HTMX: the underestimated alternative

There is a question many teams forget to ask themselves: do I really need a client application? An admin panel, a CRUD over a few entities, or a form flow does not need a component framework. They need server-rendered HTML and a little interactivity.

HTMX does exactly that. With a few HTML attributes, any element can send a request and replace a piece of the page with the HTML received from the server:

<button hx-post="/counter/increment"
        hx-target="#count"
        hx-swap="innerHTML">+1</button>
<span id="count">0</span>

app.MapPost("/counter/increment", (CounterService counter) =>
    Results.Content(counter.Increment().ToString(), "text/html"));

There is no bundle, frontend build, or duplicated state on the client. Logic, validation, and authorization reside in one place: on the server, in C#. For a .NET team building business applications, the Razor Pages + HTMX combination often produces the least code with the lowest complexity. The limit appears when the UI becomes truly rich: complex drag & drop, collaborative editing, offline work. There you need client state.

Decision table

Here is everything we discussed, compressed into a single table. It is not an absolute rule but a starting point for the discussion in the kickoff meeting.

The five questions that actually decide

If the table doesn’t help you, return to the five questions below. They almost always lead to a clear answer.

1. Does the page need to be found on Google and appear instantly on mobile? If yes, you need server rendering: a meta-framework, Astro, Razor Pages, or Blazor Static SSR. A pure SPA is out of the question.
2. Who writes the code now and in three years? A .NET team learning React writes React poorly in the first year. Existing skills are worth more than any benchmark.
3. How interactive is the UI, really? Most business applications are forms and tables. Don’t choose a framework for 5% of the screens.
4. How long does the application live? For a 10-year project, stability and conventions (Angular, Blazor) matter more than novelty. For an MVP to validate in three months, speed matters.
5. How easy is it to hire? If the plan is to grow the team quickly, the React market is a hard-to-ignore argument. If the team remains small and stable, it matters less.

The most common mistakes I see

• Choosing based on benchmarks. A difference of a few milliseconds between frameworks is not noticeable in a billing application. A slow SQL query or an endpoint without cache is noticeable.
• Resume-driven development. You choose the technology you want to learn, not the one the project needs. The cost is usually paid by the project during maintenance.
• SPA for a content site. A blog built as a React application without SSR is slower, less well indexed, and harder to maintain than the same blog rendered on the server.
• Blazor WebAssembly for landing pages. A new visitor should not download a .NET runtime to read three paragraphs. Use Static SSR for public pages and WebAssembly only in the application behind the login.
• Two frameworks without reason. A micro-frontend in Angular next to one in React makes sense at a large organizational scale. In a team of five people, it’s just double complexity.

Summary

The UI framework is not an identity statement but an engineering decision, with costs and benefits. In short:

• React has the ecosystem and market but leaves all decisions to you.
• Angular has structure and stability, and recent versions based on signals and zoneless have removed much of its weight.
• Vue and Svelte offer productivity and elegance, with a smaller ecosystem.
• Meta-frameworks and Astro are the answer when SEO and first render matter.
• Blazor is the natural choice for business applications built by .NET teams, provided you consciously choose the rendering mode.
• Razor Pages + HTMX is the simple solution many teams ignore, even though it would solve their problem with the least code.

In the next article in the series, we leave the browser: desktop and mobile. .NET MAUI, Avalonia, Uno Platform, WPF, and WinUI on the .NET side, then Flutter, React Native, Electron, and Tauri. When a native application is worth it, when a PWA is enough, and how much code you can actually share between web, desktop, and mobile.