Runtime Accelerated Rendering Infrastructure

rari is a high-performance React Server Components framework powered by a Rust runtime. Built for performance, scalability, and developer experience.

With proper app router support, true server-side rendering, and correct RSC semantics, rari delivers 46.5x higher throughput and 9.1x faster response times than Next.js.

Features

App Router - File-based routing with layouts, loading states, and error boundaries
True Server-Side Rendering - Pre-rendered HTML with instant hydration
React Server Components - Server components by default, client components when you need them
Rust-powered runtime - Persistent runtime for maximum performance
Zero-config setup - Works out of the box with pre-built binaries
Hot module reloading - Instant feedback during development
Universal NPM package support - Use any npm package seamlessly
TypeScript-first - Full type safety across server/client boundary
Cross-platform - Supports macOS, Linux, and Windows
Streaming SSR - Progressive rendering with Suspense boundaries
Loading States - Automatic loading skeletons during navigation

Quick Start

Create a new rari application in seconds:

npm create rari-app@latest my-app
cd my-app
npm run dev

That's it! Your app will be running at http://localhost:5173.

Visit rari.build/docs for complete documentation, guides, and examples.

Documentation

Read the full documentation to learn more about:

Getting started with rari
App Router and file-based routing
Server Components and Client Components
Server Actions and data mutations
Streaming SSR and Suspense
Deployment and production optimization

Why rari?

Performance That Matters

9.1x faster response times - 0.43ms vs 3.92ms average response
46.5x higher throughput - 74,662 req/sec vs 1,605 req/sec under load
46.6x faster latency under load - 0.67ms vs 31.17ms average latency
53% smaller bundles - 264 KB vs 562 KB client JavaScript
3.7x faster builds - 0.93s vs 3.47s production builds

Developer Experience

App Router - File-based routing with automatic code splitting
Zero configuration - Create projects instantly with create-rari-app
Hot module reloading - See changes instantly during development
Full TypeScript support - Complete type safety across server/client boundary
Correct RSC semantics - Server components by default, 'use client' for interactivity
Cross-platform - Works on macOS, Linux, and Windows

Performance

rari delivers exceptional performance that significantly outperforms traditional React frameworks:

Head-to-Head Comparison vs Next.js

Benchmarks last updated: February 5, 2026

Response Time (Single Request):

Metric	rari	Next.js	Improvement
Average	0.43ms	3.92ms	9.1x faster
P95	0.67ms	4.55ms	6.8x faster
Bundle Size	264 KB	562 KB	53% smaller

Throughput Under Load (50 concurrent connections, 30s):

Metric	rari	Next.js	Improvement
Requests/sec	74,662	1,605	46.5x higher
Avg Latency	0.67ms	31.17ms	46.6x faster
P95 Latency	1.15ms	38.93ms	33.9x faster
Errors	0	0	Stable

Build Performance:

Metric	rari	Next.js	Improvement
Build Time	0.93s	3.47s	3.7x faster
Bundle Size	264 KB	562 KB	53% smaller

All benchmarks are reproducible. See benchmarks/ for methodology and scripts.

Contributing

We welcome contributions! Here's how you can help:

Report Bugs - Found an issue? Open a bug report
Suggest Features - Have ideas? Share your suggestions
Improve Docs - Help make our documentation better
Submit PRs - Check out our Contributing Guide

Community

Discord - Join our community
GitHub - Star the repo
Documentation - rari.build/docs

License

MIT License - see LICENSE for details.

Rari

Rari