React on Rails: OSS vs Pro Feature Comparison
React on Rails Pro extends the open-source gem with performance optimizations and advanced rendering capabilities. Available for free or with startup-friendly pricing — see reactonrails.com/pro for details.
Feature Matrix
| Feature | OSS | Pro | Details |
|---|---|---|---|
| React in Rails views | ✓ | ✓ | Render React components directly in ERB/Haml views via react_component helper |
| Hot Module Replacement | ✓ | ✓ | Instant feedback during development with Shakapacker integration |
| Server-side rendering | ✓ (ExecJS) | ✓ (Node renderer) | OSS uses ExecJS (mini_racer); Pro adds a dedicated Node renderer for 10-100x faster SSR |
| Auto-bundling | ✓ | ✓ | File-system-based automated bundle generation — no manual javascript_pack_tags needed |
| Rspack support | ✓ | ✓ | ~20x faster builds using Rspack instead of Webpack |
| Redux integration | ✓ | ✓ | Redux store registration with server-side rendering support |
| I18n | ✓ | ✓ | Internationalization support for multilingual apps |
| React Server Components | ✓ | Full RSC support with Rails integration | |
| Streaming SSR | ✓ | Progressive server rendering using React 18's renderToPipeableStream for faster page loads | |
| Fragment caching | ✓ | Cache rendered components with cached_react_component — skips prop computation, serialization, and JS evaluation on cache hit | |
| Code splitting / Loadable Components | ✓ | Route-based code splitting with Loadable Components and server-side rendering for optimized bundle sizes | |
| Node renderer for better SSR | ✓ | Dedicated Node.js rendering server — eliminates ExecJS overhead, enables proper Node tooling for profiling and memory management | |
| TanStack Router SSR | ✓ | SSR via react-on-rails-pro/tanstack-router (Pro only); client-side-only TanStack Router works with OSS | |
| Bundle caching | ✓ | Avoid redundant webpack builds across deployments |
When to Choose Pro
Choose OSS if you:
- Need basic React integration with Rails
- Are building an app where client-side rendering is sufficient
- Want server-side rendering with moderate traffic levels
Choose Pro if you:
- Need React Server Components (RSC) support for better SEO score
- Want streaming SSR for faster Time to First Byte for better SEO score
- Have high-traffic pages where SSR caching matters
- Need code splitting with SSR for optimized bundle sizes
- Want a dedicated Node renderer to avoid ExecJS limitations
Case Study
Popmenu achieved a 73% decrease in average response times and 20-25% lower Heroku costs after adopting React on Rails Pro. They now serve tens of millions of SSR requests daily.