Blazor vs. React: A Comprehensive Comparison in 2025

The choice between Blazor vs React has become one of the defining debates in frontend development. While React’s reach extends across 7.4% of tracked websites, Blazor is rapidly growing within Microsoft’s ecosystem, now powering 32,000+ live sites. 

What’s driving this adoption lies in their foundations. React thrives on JavaScript’s vast ecosystem and community pace, while Blazor rises through C# and its deep integration with Microsoft technologies. Those roots explain not only who adopts them, but also how they diverge in architecture, performance, and scalability.

This article provides a closer examination of these differences, comparing Blazor and React across design, performance, cost, tooling, and real-world use cases. This helps you to determine which framework best suits your needs in 2025.

Blazor overview

Blazor is Microsoft’s modern web framework that enables developers to build rich, interactive applications using C# and .NET, rather than JavaScript. 

Unlike traditional JavaScript libraries, Blazor runs on WebAssembly (Blazor WASM) or on the server through SignalR (Blazor Server), providing teams with flexibility in how they architect and deploy their applications.

With its component-based architecture, strong tooling support in Visual Studio, and built-in dependency injection, it bridges the gap between client-side interactivity and enterprise-grade .NET development.

Benefits of Blazor

As part of the .NET ecosystem, Blazor offers several advantages that make it attractive for long-term projects:

• Developers can use C# for both backend and frontend, reducing context switching.
• As an ASP.NET Core application, it enables the usage of a vast diversity of NuGet packages.
• WebAssembly enables near-native performance directly in the browser.
• Applications can inherit Microsoft’s enterprise-grade security model.
• With Blazor Hybrid, components can run across web, desktop, and mobile.

 Blazor popularity

Blazor’s adoption has skyrocketed, especially among enterprises tied to .NET. The number of live websites jumped from ~12,500 in late 2023 to over 35,500 by the end of 2024, representing a nearly 184% growth in a year. 

Community activity is also rising. MudBlazor, a popular UI library, has nearly 7,000 commits on GitHub, and Blazor now ranks third among WebAssembly libraries, with 8.5 % of WASM requests across desktop and mobile. 

Microsoft’s ongoing investment in Blazor WebAssembly and Blazor Hybrid signals that its relevance will only grow in the coming years.

For a deeper dive into where Blazor is heading, see The Future of Blazor: Trends, Use Cases, and What to Expect Beyond 2025.

React overview

React is a JavaScript-based frontend library developed and maintained by Meta (Facebook) that has become a cornerstone of modern web development. Built around the Virtual DOM and a component-based architecture, React enables developers to create highly interactive and performant single-page applications (SPAs).

Its ecosystem is mature and vast, with libraries like Redux and MobX for state management, Next.js for server-side rendering, and React Native for mobile app development, making React adaptable across a wide range of use cases.

Benefits of React

React continues to dominate the frontend landscape because of its core advantages:

• The Virtual DOM minimizes costly operations and keeps apps responsive.
• Components are reusable, which reduces duplication and speeds up delivery.
• Thousands of JavaScript libraries extend its functionality for routing, testing, and UI.
• React Native allows teams to reuse logic across mobile and web projects.
• Tools like Jest, Webpack, and TypeScript ensure reliable development.
• Platforms such as Facebook, Instagram, and Netflix prove its scalability at the highest level.

React popularity

React remains a leading frontend framework thanks to its technical strength and broad adoption. It powers over 42% of the top 10,000 websites, and its npm package receives 20+ million weekly downloads. Companies like Meta, Netflix, Airbnb, and Shopify use React to deliver apps that scale to millions of users.

A massive talent pool also supports its dominance: in the 2023 Stack Overflow Developer Survey, 40% of professional developers reported using React. With proven performance, enterprise trust, and strong community backing, React is both a popular and future-ready choice for organizations worldwide.

Blazor vs. React: framework architecture

Architecture is the foundation upon which both frameworks operate, and understanding it is crucial before evaluating performance, cost, or scalability. While Blazor and React both follow a component-based architecture, their underlying technologies and execution models differ significantly.

How Blazor is built

Blazor is part of ASP.NET Core and built on .NET and C#. It supports two hosting models:

• Blazor Server: Executes components on the server and sends UI updates over SignalR. Apps stay lightweight in the browser but depend on stable network latency.
• Blazor WebAssembly (WASM): Runs .NET assemblies directly in the browser for near-native performance without JavaScript.

Its deep integration with Entity Framework, dependency injection, and NuGet makes it especially attractive to teams already using Microsoft technologies.

How React is built

React is a JavaScript-based frontend library that renders user interfaces with a Virtual DOM. Instead of updating the real DOM directly, it tracks changes in memory and applies only what’s needed, improving performance.

It focuses on the view layer and leaves the rest of the stack open. Teams often use Redux, MobX, or the Context API for state management and React Router for navigation. This modular approach makes React flexible but requires assembling third-party libraries into a complete solution.

Key architectural differences

Although both Blazor and React follow a component-based architecture, their construction and operation are fundamentally different. The table below highlights the most essential architectural contrasts:

Programming language

One of the clearest differences between Blazor and React lies in the languages on which they are built. Blazor is powered by C# and .NET, while React is rooted in JavaScript, with growing adoption of TypeScript for type safety. This distinction shapes developer skill sets, ecosystem alignment, and long-term maintainability.

C# in Blazor

Blazor lets developers use C# end-to-end, both on the server and in the browser via WebAssembly. For organizations already invested in .NET, this means that existing libraries, business logic, and models can be reused without needing to be rewritten in JavaScript.

Key advantages include:

• Strong typing reduces runtime errors by catching issues at compile time.
• Business logic and APIs can be shared across backend and frontend.
• Developers can directly use NuGet packages, such as Entity Framework, to access and modify data via LINQ syntax rather than pure SQL queries.
• Teams stay consistent by working in a single language across both client and server.

JavaScript/TypeScript in React

React is built on JavaScript, the most widely used language in web development. This ubiquity is a significant strength: most frontend developers already know JavaScript, which makes talent acquisition straightforward. Over time, TypeScript has become increasingly popular in React projects, bringing stronger typing and better tooling.

Key advantages include:

• A large talent pool reduces hiring friction for teams worldwide.
• JavaScript’s flexibility enables rapid prototyping and iteration.
• TypeScript introduces static typing, stronger IDE support, and reduced runtime errors.
• An extensive ecosystem provides libraries for state management, testing, and UI.

Performance benchmarks of Blazor and React

Performance differs not just between Blazor and React, but also across Blazor’s hosting models. If you’ve ever wondered how Blazor performance vs React stacks up in real-world benchmarks, this section breaks it down.

Blazor vs. React: learning curve

Between React vs Blazor, the tool an organization must pick should largely depend on the team’s existing expertise. The table below highlights where skills transfer easily and where new learning is required. 

Takeaway: Blazor shortens the path for .NET teams who want to expand into frontend without learning JavaScript. React, on the other hand, keeps the curve light for JavaScript developers, allowing them to become productive almost immediately.

Blazor vs. React: ecosystem and community

Beyond performance and architecture, the long-term viability of a framework often depends on the strength of its ecosystem and the community that supports it. Here, React and Blazor take very different shapes.

Summary: React offers unmatched breadth, powered by its community and open-source ecosystem. Blazor provides a smaller but more cohesive environment with strong Microsoft backing, making it especially attractive for enterprises already in .NET.

Real-world use cases

The way organizations adopt frameworks reflects their priorities and values. Enterprises focus on stability, compliance, and integration, while startups push for speed, agility, and scalability.

Enterprise with Blazor

Blazor is gaining traction in industries where .NET already has a strong presence. Its unified C# approach makes it attractive for enterprises that need reliability, security, and tight system integration.

Startups with React

React is the go-to for startups that need to launch fast and scale without major rewrites.

Blazor vs. React: development speed

The speed at which a team can move depends on project setup, iteration cycles, and build performance. To put Blazor vs React speed into perspective, the following table breaks down where each framework gains or loses time.

Blazor vs. React: scalability and maintenance

Scaling and maintaining apps depend on architecture, tooling, and ecosystem maturity. Blazor scales smoothly in Microsoft environments, while React has proven itself in high-traffic consumer platforms.

Cost of development: Blazor vs. React in 2025

In 2025, the cost gap between Blazor and React primarily stems from labor markets and long-term maintenance, rather than licensing.

Blazor development costs

Enterprises with existing .NET teams can reduce costs by reusing C# talent across backend and frontend, avoiding retraining and cutting maintenance overhead. But the limited pool of Blazor specialists makes external hiring expensive, and scaling quickly can be a challenge. For organizations already in the Microsoft ecosystem, the efficiencies outweigh the premium.

React development costs

React is more cost-effective for staff thanks to its massive global developer base, making it the economical choice for startups and teams that need to move quickly. However, its sprawling ecosystem can inflate budgets over time. Without strong governance, library bloat and dependency churn add hidden maintenance costs that offset its initial affordability.

Microsoft Blazor vs. React: security

Microsoft Blazor vs React reveals two very different approaches to security.

Security in Blazor

Blazor inherits ASP.NET Core’s protections, including identity, role-based access, and encryption. This makes it a strong fit for regulated industries. However, risks remain: SignalR connections must be secured, and WASM apps must be protected from tampering. Microsoft’s centralized updates help ease the burden on developers.

Security in React

React has no unified security model. Teams rely on best practices and third-party libraries for authentication and data protection. This flexibility allows customization but creates exposure: XSS, CSRF, and npm supply-chain risks are common. Security depends on strict dependency and patch management.

Blazor vs. React: tooling and IDE support

Tooling influences developer productivity as much as framework features. Blazor offers deep integration with Microsoft IDEs, while React thrives in a flexible, open-source toolchain.

Cross-platform capabilities of Blazor and React

Both frameworks support web applications, but their approaches diverge when it comes to mobile and desktop.

Takeaway: React dominates consumer-facing cross-platform apps through React Native, while Blazor offers a more unified path for enterprises already invested in .NET, particularly with Blazor Hybrid, which extends code reuse to mobile and desktop.

Final thoughts

At Reenbit, we’ve seen how the choice between Blazor and React directly impacts product outcomes. Both frameworks solve similar problems but align with different priorities.

React is often the right choice when speed to market, a vast library ecosystem, and talent availability are top priorities. It’s a proven option for startups and consumer platforms scaling quickly.

Blazor, on the other hand, is a strong fit for enterprises already invested in Microsoft technologies. Its unified C# stack supports governance, security, and long-term maintainability. While we help clients across various technologies, we recommend that organizations find the right fit for their projects.

Looking to build your next project with Blazor? Hire Blazor Developers at Reenbit and move forward with confidence.