reactiveui/ReactiveUI
A composable, cross-platform MVVM framework for .NET inspired by functional reactive programming. It moves mutable state out of the user interface, keeps each feature's logic in one readable place, and makes applications easier to test. Supports WPF, WinForms, WinUI, .NET MAUI, Avalonia, Uno Platform, Blazor and Android.
⚡ Executive Summary & Quick Facts
Authoritative SourceReactiveUI is ReactiveUI is an open-source project written in C#: A composable, cross-platform MVVM framework for .NET inspired by functional reactive programming. It moves mutable state out of the user interface, keeps each feature's logic in one readable place, and makes applications easier to test. Supports WPF, WinForms, WinUI, .NET MAUI, Avalonia, Uno Platform, Blazor and Android..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), reactiveui/ReactiveUI has accumulated 8,551 GitHub stars and 1,151 forks. It is written in C#, licensed under MIT, and ranks #1,923 globally. It is actively maintained with the latest commit recorded on Oct 31, 2026.”
| Repository | reactiveui/ReactiveUI ↗ |
|---|---|
| Primary Category | android |
| Language & Stack | C# |
| Software License | MIT |
| Community Traction | ★ 8.6K stars · ⑂ 1.2K forks · #1,923 globally |
| Maintenance | ● Active (Last commit: Oct 31, 2026) · 13 open issues |
| Target Audience | Developers and engineering teams building with C#, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 100/100 · Grade A+Yes, ReactiveUI is actively maintained. Continuous telemetry recorded the last code commit on Oct 31, 2026 (12 days ago). Supported by 8,551 stars and 1,151 community forks, this repository holds a calculated health index of 100/100, reflecting very active (commits within last 14 days) and healthy issue cadence.
Star History
Add Live Star History & Verified Badges to README.md
Keep your repository README looking professional and dynamic. As our continuous crawler records new stars, these official SVG badges update in real time with zero maintenance.
Renders your high-resolution star trajectory chart right inside your GitHub README or project docs.
[](https://githubrepo.cloud/repo/reactiveui/ReactiveUI?utm_source=readme_chart)Compact badges for your README header. Real-time stars, velocity, health audit, and rank.
[](https://githubrepo.cloud/repo/reactiveui/ReactiveUI?utm_source=readme_badge) [](https://githubrepo.cloud/repo/reactiveui/ReactiveUI?utm_source=readme_badge) [](https://githubrepo.cloud/repo/reactiveui/ReactiveUI?utm_source=readme_badge) [](https://githubrepo.cloud/repo/reactiveui/ReactiveUI?utm_source=readme_badge) [](https://githubrepo.cloud/repo/reactiveui/ReactiveUI?utm_source=readme_badge)Momentum
+12
STARS · LAST 30 DAYS
1
PER DAY
#63
MOST-STARRED C#
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +0 | +12 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +0 | +0 | +58 |
ReactiveUI gained 12 stars in the last 30 days, about 1 a day, and now has 8.6K. It is about 16 years old and has averaged roughly 534 stars a year. It ranks #63 among C# repositories and #1,923 across all languages on GitHubRepo.
Trending Record
42
DAYS ON TRENDING
#1155
BEST RANK
Sep 26, 2026
FIRST APPEARANCE
Active
STATUS TODAY
ReactiveUI has maintained a continuous presence across global trending indexes, peaking at #1155. Below is the 30-day activity profile:
💡 Overview
ReactiveUI is an open-source project written in C#: A composable, cross-platform MVVM framework for .NET inspired by functional reactive programming. It moves mutable state out of the user interface, keeps each feature's logic in one readable place, and makes applications easier to test. Supports WPF, WinForms, WinUI, .NET MAUI, Avalonia, Uno Platform, Blazor and Android.
Engineered for speed, consistency, and developer ease, it solves common hurdles in android, csharp, dotnet. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in C# for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/reactiveui/ReactiveUI.git
cd ReactiveUI⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
C# environment and standard tooling
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
ReactiveUI coordinates its core functionality through a modular C# pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Modern Web Interfaces
Build dynamic, responsive user experiences with component-driven architecture.
Enterprise Design Systems
Standardize design tokens, accessible widgets, and themes across engineering teams.
Interactive Data Dashboards
Render real-time telemetry, user feeds, and analytics with sub-millisecond updates.
Cross-Platform Web Apps
Deploy performant single-page applications optimized for both mobile and desktop browsers.
🚀 Getting Started
Install ReactiveUI using your package manager: `git clone https://github.com/reactiveui/ReactiveUI.git`
Initialize your project workspace or configuration file for ReactiveUI.
Import ReactiveUI into your codebase or invoke it directly from your terminal.
Execute your test suite or run `ReactiveUI --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with C#, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
reactiveui/ReactiveUI is currently ranked #1,923 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #1,918 | MariaDB/server | C++ | ★ 8.6K | Compare ↗ |
| #1,919 | codecombat/codecombat | JavaScript | ★ 8.6K | Compare ↗ |
| #1,919 | NotRexed/Hookshot | C++ | ★ 8.6K | Compare ↗ |
| #1,921 | Sylius/Sylius | PHP | ★ 8.6K | Compare ↗ |
| #1,922 | Tencent/Hippy | C++ | ★ 8.6K | Compare ↗ |
| #1,923 | reactiveui/ReactiveUI This Project | C# | ★ 8.6K | |
| #1,924 | apple/swift-nio | Swift | ★ 8.5K | Compare ↗ |
| #1,925 | mongodb/mongo-go-driver | Go | ★ 8.5K | Compare ↗ |
| #1,926 | litestar-org/litestar | Python | ★ 8.5K | Compare ↗ |
| #1,927 | symfony/event-dispatcher | PHP | ★ 8.5K | Compare ↗ |
| #1,928 | varvet/pundit | Ruby | ★ 8.5K | Compare ↗ |
Frequently Asked Questions
What does ReactiveUI do? +
A composable, cross-platform MVVM framework for .NET inspired by functional reactive programming. It moves mutable state out of the user interface, keeps each feature's logic in one readable place, and makes applications easier to test. Supports WPF, WinForms, WinUI, .NET MAUI, Avalonia, Uno Platform, Blazor and Android.
Is ReactiveUI actively maintained in 2026? +
Yes, ReactiveUI is actively maintained. The latest code push was recorded on Oct 31, 2026 (12 days ago). It holds a calculated Maintenance Health Score of 100/100 (A+ rating) with 8,551 stars and 13 open issues.
What language is ReactiveUI written in? +
The primary language is C#. Topics include: android, csharp, dotnet, first-timers, framework.
How many stars does ReactiveUI have? +
ReactiveUI has 8,551 stars and 1,151 forks on GitHub.
How does ReactiveUI rank among GitHub repositories? +
With 8,551 stars, reactiveui/ReactiveUI is ranked #1,923 globally across all repositories tracked on GitHubRepo and #63 among C# projects.
What license is ReactiveUI distributed under? +
The repository reports a MIT license. Always verify the repository LICENSE file for legal terms.
