# Overview

We love React, and we want to keep writing it. Redact is an alternative runtime for React apps, built around React's APIs and component model. Integrations for TanStack Start, Vite, Vinext, and Next.js keep your application's imports unchanged. Vinext and Next.js keep native React on the server and use Redact in the browser.

The goal is another runtime option within the React ecosystem, not a replacement for React as a project. Redact chooses synchronous rendering and a smaller footprint; React's concurrent scheduler supports use cases that need different behavior. JSX, hooks, context, refs, memo, lazy, portals, error boundaries, streaming SSR, and hydration are supported.

The [compatibility guide](./compatibility.md) explains the API differences, including pending transitions, actions, and optimistic state. React DevTools supports inspection, editing, and commit profiling in development, with [checks and timings](https://github.com/TanStack/redact/blob/main/docs/devtools-implementation-status.md).

## Get started

[Install Redact](./installation.md), then choose [TanStack Start](./start.md), [Vite](./quick-start.md), [Vinext](./vinext.md), or [Next.js](./next.md). Vinext and Next.js use the full runtime. In Start and Vite apps, start with the default preset and only disable features after checking what your app uses.

The [feature flags guide](./feature-flags.md) explains the behavior each flag removes. The [Vite plugin reference](./vite-plugin.md) covers monorepos and manual package resolution.

## Measurements

The [bundle size and performance guide](./performance.md) records the measured versions, configurations, and workload limits. Runtime bundle sizes are not whole-app sizes, and microbenchmarks do not establish whole-app speedups.