Rari

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 12x higher throughput and 2x 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

2x faster response times - 1.32ms vs 2.63ms average response
12x higher throughput - 21,263 req/sec vs 1,760 req/sec under load
14x faster latency under load - 1.94ms vs 27.89ms average latency
66% smaller bundles - 28.1 KB vs 82.0 KB client JavaScript
2.6x faster builds - 1.73s vs 4.43s 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: January 14, 2026

Response Time (Single Request):

Metric	Rari	Next.js	Improvement
Average	1.32ms	2.63ms	2.0x faster
P95	3.36ms	4.06ms	1.2x faster
Bundle Size	28.1 KB	82.0 KB	66% smaller

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

Metric	Rari	Next.js	Improvement
Requests/sec	21,263	1,760	12.1x higher
Avg Latency	1.94ms	27.89ms	14.4x faster
P99 Latency	<2ms	28ms	14x faster
Errors	0	0	Stable

Build Performance:

Metric	Rari	Next.js	Improvement
Build Time	1.73s	4.43s	2.6x faster
Bundle Size	433 KB	543 KB	20% 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.