Radzen Blazor Components is a free, MIT-licensed library of more than 145 native UI components for developers building Blazor Server, Blazor WebAssembly, and .NET MAUI Blazor Hybrid applications on .NET, distributed as the Radzen.Blazor NuGet package.

What it is

Radzen Blazor Components is an open-source component library for the Blazor ecosystem in .NET. It targets ASP.NET Core, follows Bootstrap and Bootstrap 5 styling conventions, and works across Blazor Server, Blazor WebAssembly, and .NET MAUI Blazor Hybrid hosting models on .NET 10. The project is documented at blazor.radzen.com with live demos, is licensed under MIT, and organises its output into component families: AI, Data, Forms, Layout, Navigation, Feedback, Utility, and Theming.

The concrete problem it solves is that a Blazor application otherwise has to assemble every grid, chart, scheduler, form control, and dialog by hand or stitch them together from separate packages. Radzen Blazor Components supplies those as native components in a single dependency with a shared theme system, so a data-heavy application can adopt paging and sorting grids, a scheduler, charting, form inputs, notifications, and dialogs without building or maintaining that layer itself.

Key capabilities

• Native components for AI surfaces: AIChat, Chat, Markdown, and SpeechToTextButton.
• Data components including DataGrid, DataList, PivotDataGrid, DataFilter, PickList, Pager, Tree, Scheduler, Gantt, Timeline, and Spreadsheet.
• Charting across Line, Bar, Column, Area, Pie, Donut, Scatter, Bubble, Spider/Radar, BoxPlot, Bullet, Candlestick, OHLC, Pyramid, Funnel, Waterfall, HighLow, Range Area/Bar/Column, Step Line/Area, stacked and full-stacked variants, and Contour, plus Heatmap, Treemap, RangeNavigator, SankeyDiagram, and GaugeCharts in Radial, Linear, and Arc forms.
• Form inputs covering TextBox, Numeric, Mask, DatePicker, TimePicker, ColorPicker, Dropdown, AutoComplete, Switch, Slider, Rating, Upload, SecurityCode, SignaturePad, HtmlEditor, Button, SplitButton, and Login.
• Theming with 10 built-in themes in light and dark variants; the free set is Material, Standard, Default, Humanistic, and Software, with full CSS variable customization and a theme service for runtime switching.
• Utility components such as QRCode, Barcode, Gravatar, GoogleMap, and DropZone for drag-and-drop.
• Layout, navigation, and feedback primitives including Card, Tabs, Accordion, Splitter, Tile Layout, Dialog, Sidebar, Carousel, Menu, PanelMenu, Breadcrumb, TreeView, Notification, Alert, Skeleton, ChipList, and AppearanceToggle.

Who uses it and how

• Teams building Blazor Server, Blazor WebAssembly, or .NET MAUI Blazor Hybrid front ends on .NET 10 use it as a shared UI layer across hosting models.
• The README states the library is used by thousands of developers, naming Microsoft, NASA, Porsche, Dell, Siemens, and DHL among the companies.
• Dashboard and reporting work leans on DataGrid, PivotDataGrid, Scheduler, Spreadsheet, and the chart family for tabular and analytical views.
• Applications that must match an existing Bootstrap or Bootstrap 5 site adopt it to keep visual consistency with the surrounding ASP.NET Core application.
• Products offering user-selectable appearance use AppearanceToggle together with the theme service and CSS variables for runtime light and dark switching.

Getting started

Install with dotnet add package Radzen.Blazor, add @using Radzen and @using Radzen.Blazor to _Imports.razor, include the theme and script in App.razor, and register services with builder.Services.AddRadzenComponents() in Program.cs. The getting started instructions linked from blazor.radzen.com cover render modes and dialog and notification configuration.

How it compares

The registry facts name no competing Blazor component libraries, so this project stands alone here rather than against a named rival. The one contrast the facts support is internal: the components and the Material, Standard, Default, Humanistic, and Software themes are MIT-licensed and free, while the Material 3 and Fluent themes are premium and arrive with Radzen Blazor Pro.

When to use it — and when not to

There is nothing extra to operate, because the package is a library rather than a service: no database, object storage, or SMTP server has to be run by a self-hoster. Teams outside Blazor and .NET should not adopt it, and anyone who specifically needs Material 3 or Fluent themes without a commercial tier should check Radzen Blazor Pro pricing first, since those themes sit outside the free set. The repository shows 4,348 stars, 957 forks, and 32 open issues with its most recent push in September 2026, which indicates active maintenance rather than a finished product, so the live demos are worth checking before committing.

dotnet add package Radzen.Blazor

@using Radzen
@using Radzen.Blazor

<!-- inside <head> -->
<RadzenTheme Theme="material" />

<!-- after the last <script> -->
<script src="_content/Radzen.Blazor/Radzen.Blazor.js"></script>

builder.Services.AddRadzenComponents();

<RadzenButton Text="Hello World" Click="@OnClick" />