Blazor vs Angular: A Comprehensive Comparison

Até recentemente, se você fosse um desenvolvedor C# e quisesse escrever código para navegadores, você praticamente usava JavaScript. Mas o mundo do desenvolvimento web está mudando rapidamente e você não precisa mais depender do JavaScript para o desenvolvimento de aplicativos da web de ponta.

What if I told you, then, that you could use Blazor for server-side and client-side app development?In this blog post, I’ll explore what that really means by comparing Blazor with Angular, both top choices for modern developers. 

Key Article Takeaways:

• Framework Overview: Blazor utilizes C# within the .NET ecosystem for web applications, while Angular is a mature framework using TypeScript primarily for dynamic single-page applications (SPAs). 
• Hosting Models: Blazor offers two models: Blazor Server (with real-time updates via SignalR) and Blazor WebAssembly (client-side execution). Angular focuses on client-side rendering to enhance performance and user experience. 
• Performance: Angular generally provides faster initial load times due to its optimized JavaScript approach, whereas Blazor WebAssembly may experience slower loads but offers efficient execution once live. 
• Development Experience: Blazor has a gentler learning curve for C# developers, while Angular’s reliance on TypeScript introduces complexity but provides powerful features for building robust applications. 
• Use Cases: Blazor is suitable for applications needing both client-side and server-side interactions, while Angular excels in large-scale, high-engagement interfaces. 
• Strengths and Weaknesses: Blazor’s familiarity for .NET developers and server-side processing efficiency contrasts with Angular’s established ecosystem and rapid loading, though Angular’s complexity can challenge newcomers. 

	Angular	Blazor
Pronto para produção	Angular está pronto para produção hoje com anos de implantações testadas em batalha.	Com o lançamento do .NET 6 em novembro de 2021, Blazor fez grandes melhorias e pode ser considerado pronto para produção para a maioria dos aplicativos.
Curva de aprendizado	Maior curva de aprendizado quando comparado ao Blazor, especialmente para desenvolvedores .NET / C #.	Acesso fácil para desenvolvedores de C# e Visual Studio.
Performance	Mais ajustado para o desempenho, pois a estrutura é muito madura.	A Microsoft continua a ajustar Blazor desempenho, o .NET 6 abordou muitos dos problemas das versões anteriores.
PWA (Progressive Web App) Support	Sim	Yes (Blazor Web Assembly)
Requer uma conexão ativa por cliente	No	Yes (Blazor Server)
Armazena o estado do componente no lado do servidor para cada cliente	No	Yes (Blazor Server)
Estilos com escopo definido para componentes	Sim	Sim
Bundle Size	< 50KB (Ivy com gZip)	Minimal for Blazor Server. As low as 393kb, up to 780kb for .NET Framework in a Client-side WASM app.
Ferramental	CLI mais muitas opções de terceiros.	CLI, Visual Studio e 3 opções de terceiros.
Otimizado para SEO / Crawlers	Angular server-side rendering.	Sim
Shipping Cadence	2 grandes lançamentos por ano, o que é muito para as empresas acompanharem.	1 versão principal por ano com o .NET, com pequenas atualizações ao longo do ano.
Code Style	Very verbose, lots of boilerplate to get started.	Otimizado para menos clichê, fácil de começar.

Is The Blazor Hype Still Relevant? 

A couple of years ago, Blazor was one of the most talked-about technologies in the .NET ecosystem. It promised a bold vision: full-stack web development with C#, eliminating the need for JavaScript entirely. The idea of running .NET code directly in the browser using WebAssembly sparked excitement among developers, especially those already invested in the Microsoft stack.  

The situation is a bit different now and Stamen Stoychev, Product Development Manager at Infragistics, has an interesting observation. According to him: 

“What is the situation in 2025? While the initial buzz around Blazor has certainly died down, it’s still growing its audience, albeit more slowly and primarily where it was always expected to – enterprises with complex software already on .NET that need an easy way to bring their frontend to the web. 

Its primary disadvantage is still holding it back from broader appeal – Blazor WebAssembly’s initial load times are higher due to the need to download the .NET runtime in the browser. This stands in contrast to JavaScript frameworks like Angular, which are typically smaller and can leverage server-side rendering and lazy loading to achieve high-speed performance.”

Blazor is making improvements on that front, so it’s worth keeping an eye on for future reevaluation. 

What’s a harder sell, though, is that JavaScript remains by far the most widely used programming language in the world. Asking developers to switch to something entirely different (with little or no gain in productivity) is a tricky proposition for most of today’s web developers.

What Is Blazor?

Blazor is a Microsoft ASP.NET Core web framework that allows developers to write code for browsers in C#. Blazor is based on existing web technologies like HTML and CSS but then allows the developer to use C# and Razor syntax instead of JavaScript. Razor is a popular template markup syntax for .NET. Blazor (Browser + Razor) enables developers to build interactive and reusable web UI for client-side applications written in .NET and implemented under WebAssembly. With both client and server code written in C#, it allows you to share code and libraries, providing a platform to enable the development of vibrant, contemporary single-page applications (SPA) while using .NET end-to-end.

O maior destaque do Blazor é que ele aproveita os padrões da Web mais recentes e não precisa de plug-ins ou complementos adicionais para serem executados em diferentes modelos de implantação, seja uma opção WebAssembly do lado do cliente e uma opção de ASP.NET Core do lado do servidor.

Understanding WebAssembly

WebAssembly, often abbreviated Wasm, is a new standard that can be run in modern web browsers, bringing language diversity to the web platform. Wasm is a low-level assembly-like language featuring a compact binary format that makes it possible to run code written in multiple languages, such as C/C++, Java, and Rust, on the web with near-native performance.

O objetivo do WebAssembly é facilitar aplicativos de alto desempenho em páginas da web. No entanto, seu formato é projetado para execução e integração em outros ambientes e também pode ser executado junto com o JavaScript.

Características do Blazor

• Crie interfaces do usuário da Web com C# em vez de JavaScript ou TypeScript
• Build progressive web apps (PWAs)
• Criar e usar componentes Blazor reutilizáveis escritos em C#
• Suporte completo à depuração no lado do servidor e depuração com algumas limitações no lado do cliente
• Vinculação de dados com o HTML DOM (vinculação bidirecional limitada)
• Compartilhar código entre cliente e servidor em C#
• Server and client-side models
• Server-side rendering (aka pre-rendering) for higher performance
• Compilação antecipada
• Scoped styles
• Conexões WebSocket
• Works offline (client-side WebAssembly only)
• Works in all modern web browsers, including mobile browsers
• Blazor code has the same security sandbox as JavaScript
• Usar a interoperabilidade JavaScript para chamar estruturas e bibliotecas JavaScript
• Open source

What Is Angular?

Angular, the successor of AngularJS, was created by Google to allow frontend developers to interact with both frontend and backend at the same time. Because Angular is JavaScript-based, there are a lot of resources to work with.

Angular has been around for over a decade, while Blazor has been in the market for only a few years. Angular is a production-ready framework with full support for MVC/MVVM applications, and many large companies are using it. Blazor, while being used by some large brands, is early in its lifecycle.

If you go through Reddit, you will notice some polar opinions, but generally, I can summarize these factors: 

• If you’re a C# dev, Blazor is preferred for productivity, consistency, and reduced context switching
• For broader compatibility and community, Angular and React still lead, but come with more moving parts
• Blazor Server is more mature/stable, while Blazor WASM is catching up but still heavy
• A few devs use Blazor + React or Blazor + JS interop together, depending on needs

Angular and Blazor both support progressive web apps (PWAs), though Blazor server-side is not capable of being deployed as a PWA, only the WASM-based Blazor client-side.  Both Angular and Blazor are supported in major IDE’s, with full debugging support, as well as additional tooling for developer productivity. 

Angular stands out in terms of popularity and ecosystem: 

• Nearly 80K stars and 20K+ forks on GitHub 
• Over 275,000 questions on Stack Overflow 
• Extensive learning resources: courses, books, blogs, and videos 
• Regular Angular-focused tech events globally 
• Strong third-party library and tool integration support 

Angular can potentially load apps faster by using “ahead-of-time compilation” or AOT.  AOT converts your Angular HTML and TypeScript code into efficient JavaScript code during the build phase before the browser downloads and runs that code. Compiling your application during the build process provides a faster rendering in the browser. Blazor also supports AOT, but with client-side WebAssembly, which has a larger initial deployment payload compared to the .NET Framework. 

Additional Angular development features include: 

• Scoped styles to isolate CSS to specific components
• Modular architecture through Angular elements and modules
• Lazy loading for improved performance
• I18n (Internationalization) support for localization
• Ionic integration for cross-platform mobile development (iOS & Android)

Como mencionado brevemente, há um enorme repositório de pacotes de código aberto disponíveis para desenvolvedores Angular, incluindo:

• Ignite UI for Angular
• NgBootstrap
• Angular Google Maps
• NgRx
• NgTranslate
• AngularFire
• NgxTextEditor
• Angular Material
• Ng2 Pdf Viewer and many more

The state of web development is being taken to another level. Software engineers no longer have to rely on the typical frameworks and outdated tools for the solutions they build. Now they have a chance to transform and streamline the way their software comes to life. And here is something interesting.

Os últimos dois meses foram muito ocupados para nossas equipes técnicas em Infragistics pois estávamos trabalhando em maneiras de aprimorar nosso App Builder para aplicativos Angular e disponibilizá-lo também para o desenvolvimento de aplicativos Blazor. E os App Builder para Blazor e App Builder para Web Components já estão disponíveis!

Se esta é a primeira vez que você se depara com essa nova tecnologia da Infragistics, aqui estão algumas coisas para ajudá-lo a entender o valor e os recursos do WYSIWYG App Builder:

• Uma solução completa de design para código, ideal para gerentes de produto, designers e desenvolvedores.
• The only WYSIWYG drag and drop tool for web apps available on the market.
• Works as a low-code tool generating clean Angular, React, Web Components, and Blazor code.
• Keeps up with the AI evolution, providing App Builder AI functionalities.
• Ajuda as empresas a projetar e criar aplicativos de negócios completos 80% mais rápido do que nunca.
• Elimina silos, reduz atrito, falhas de comunicação e erros caros.

So, if you’re looking for Angular Data Grids/Table, you can try out the Infragistics’ Angular Data Grid. It delivers features like quick data binding, cell and row selection, cell and row editing and error validation, column summaries, interactive Outlook-style grouping, Microsoft Excel-style filtering, and virtualized rows and columns. It also features an intuitive API for easy theming and branding. In the latest Angular Grid tutorial, you can quickly learn how to create a full-featured Angular UI Grid from scratch.

Comparing Blazor and Angular

Tanto o Blazor quanto o Angular são frameworks da web de código aberto. Sua principal diferença é que o Angular é baseado em JavaScript, enquanto o Blazor aproveita o C# para desenvolver para a web. Algumas diferenças importantes incluem:

Should You Choose Blazor or Angular?

Tanto Blazor quanto Angular são opções viáveis para o seu próximo projeto. Tudo se resume a algumas considerações:

• Você está disposto a lidar com alguns solavancos no caminho com uma estrutura mais recente como Blazor?
• Você está disposto a mergulhar e gastar tempo para aprender Angular obter o benefício de uma estrutura testada em batalha?
• Are you a C# developer who wants an easier on-ramp to modern web apps?
• Are you a hard-core JavaScript developer who would never even consider using .NET for the web?

Coisas que tornam Blazor uma estrutura tão interessante: 

• You can create web apps with pure C# skills
• You can run .NET in the browser without add-ons and plugins, thanks to a Blazor technology called WebAssembly
• You can cut render times on images
• You get progressive web app development
• Fully enabled server-side debugging

Coisas que tornam Angular uma estrutura tão popular: 

• Ensures effective cross-platform development
• Faster builds and high performance are guaranteed
• Web apps are super lightweight, interactive, and dynamic
• It’s been around for ages and has a massive Angular dev community
• Styling improvements and upgrades to keep it going

Acreditamos que não importa qual você escolha, há compensações.

Na Infragistics, oferecemos suporte a ambas as estruturas. Visite nossas páginas Ignite UI for Angular e Ignite UI for Blazor para saber os detalhes de cada uma.

If you want, you can also read our comparison article on Blazor vs React. 

(Last updated: August 12, 2025)