Ivy is a modern C# framework that lets you build reactive full-stack web applications entirely in pure C# - using familiar React-style components, hooks, and declarative patterns. No frontend/backend split, no HTML/CSS/JS - just write type-safe C# code and ship beautiful, production-ready internal tools at lightning speed.

Quick Start   •   Docs   •   Samples   •   Examples   •   Current Sprint   •   Roadmap

Ivy takes a lot of inspiration from frameworks like React. If you know React, you'll feel right at home. Here's a simple counter app built with Ivy:

public class SimpleCounterApp : ViewBase
{
   public override object? Build()
   {
       var count = UseState(0);
       
       UseEffect(() =>
       {
           Console.WriteLine($"Count changed to: {count.Value}");
       }, [count]);

       return Layout.Vertical(
           Text.Block($"Count: {count.Value}"),
           new Button("Increment", onClick: _ => count.Set(count.Value + 1))
       );
   }
}

• Rich Widget Library: Extensive set of pre-built widgets to build any app. If you need more, an external widget framework is coming soon, where you can integrate any React, Angular, or Vue component.
• External Widget Framework: Easily integrate any third-party React component.
• Hooks: Familiar React-style hooks for state management, side effects, and lifecycle events.

• Forms: Create complex CRUD forms with validation and data binding.
• Data Tables: Sort, filter, and paginate data.
• Charts/Dashboards: Build interactive charts and dashboards with ease.

• Hot-Reloading: Full support for hot-reloading with maintained state as much as possible.
• LLM Code-Generation Compatibility: Designed to maximize compatibility with LLM code generation tools.

Ivy maintains state on the server and sends updates over WebSocket. The frontend consists of a pre-built React-based rendering engine. With Ivy, you never need to touch any HTML, CSS, or JavaScript. Only if you want to add your own widgets.

The Ivy.Console CLI provides a suite of tools to streamline your development workflow:

• Project Initialization: Quickly set up new Ivy projects with predefined templates.
• AI-Powered App Generation: Generate applications using AI based on your specifications.
• MCP: Teach any coding agent to use Ivy Framework for building full-stack applications.

• Authentication: Built-in support for popular authentication providers like Supabase, Auth0, Clerk, and Microsoft Entra.
• Database: Easy integration with SQL Server, Postgres, Supabase, MariaDB, MySQL, Airtable, Oracle, Google Spanner, Clickhouse, Snowflake, and BigQuery.

• Deployment Management: Manage deployments to Azure, AWS, Google Cloud, or Sliplane with ease.
• Secrets Management: Securely manage sensitive information within your applications.

See Demo Video →

⚠️ Note: Ivy.Console is still in beta, and the agentic features require an account. Register for a free account to be among the first to try these features.

Make sure you have the .NET 10 SDK installed.

1. Install Ivy CLI:

   dotnet tool install -g Ivy.Console

2. Create a new project:

    ivy init --hello

3. Run:

   ivy run --browse

4. Open http://localhost:5010 in your browser.

You can also run ivy samples to see all the components that Ivy offers and ivy docs for documentation.

• Contribution Guidelines
• Internal Developer Wiki