rari 0.7.5

Runtime Accelerated Rendering Infrastructure - A high-performance React Server Components framework powered by Rust
Documentation

Rari

Runtime Accelerated Rendering Infrastructure

npm version License: MIT Discord

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:

Community

License

MIT License - see LICENSE for details.