Ivy Framework

github.com/ivy-interactive/ivy-framework

Modern C# framework designed for building reactive full-stack web applications entirely in pure C#.

Overview

Ivy is a modern C# framework designed for building reactive full-stack web applications entirely in pure C#. It eliminates the traditional frontend/backend split by unifying the codebase, allowing developers to write type-safe C# code without touching HTML, CSS, or JavaScript. The framework draws inspiration from React, offering familiar patterns like components, hooks, and declarative UI patterns.

Built with developer experience in mind, Ivy includes hot-reloading, LLM code-generation compatibility, and a rich widget library for building internal tools and dashboards. Under the hood, it uses Rust-compiled native libraries for JSON diffing and document processing, delivering significantly better memory efficiency than traditional .NET solutions. The framework maintains state on the server and sends updates over WebSocket to a pre-built React-based rendering engine.

Key features

Production-oriented capabilities with an active ecosystem
Integrations with popular languages and frameworks
Documentation and community resources for adoption

Pros

Clear positioning in the developer tools category
Fits common modern stack patterns
Strong option when requirements align with its sweet spot

Cons

Operational complexity varies by hosting model and team experience
Pricing and limits depend on workload and vendor tier
Validate fit against alternatives before committing

Use this if

You want to build full-stack applications entirely in C# without managing separate frontend and backend codebases, or you're leveraging LLM code generation tools and need a framework optimized for that workflow.

Skip this if

You need a framework with a large, mature ecosystem, prefer JavaScript/TypeScript for frontend development, or require extensive third-party library support beyond C#.

Best for

Building internal tools and dashboardsFull-stack C# developmentTeams using LLM code generationRapid application developmentType-safe web applications

Alternatives

React with .NET backendBlazorNext.js with Node.js backendAngular with .NET backend

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