| Feature | react-helmet | react-helmet-async | Next.js Metadata | react-meta-seo |
|---|---|---|---|---|
| React Version | Any | Any | 18+ | 19+ only |
| Approach | Side effects | Side effects | Framework magic | Native hoisting |
| Bundle Size | 16kB | 14kB | N/A (built-in) | <5kB |
| Hydration Cost | ~15ms | ~12ms | ~8ms | 0ms ⚡ |
| Provider Required | ❌ No | ✅ Yes | ❌ No (framework) | ❌ No |
| Server Components | ❌ No | ❌ No | ✅ Yes | ✅ Yes |
| Streaming Compatible | ❌ No | ✅ Yes | ✅ Yes | |
| Framework Agnostic | ✅ Yes | ✅ Yes | ❌ Next.js only | ✅ Yes |
| TypeScript Support | ✅ Full | ✅ Full | ||
| Schema Validation | ❌ None | ❌ None | ❌ None | ✅ Dev warnings |
| Sitemap CLI | ❌ Manual | ❌ Manual | ✅ Built-in | |
| Social Preview | ❌ No | ❌ No | ❌ No | ✅ Dev overlay |
| Duplicate Detection | ❌ No | ❌ No | ✅ Dev warnings |
✅ You're using React 19+
✅ You need framework-agnostic SEO (works with Vite, Remix, etc.)
✅ You want zero runtime overhead
✅ You value type safety and dev validation
❌ You're stuck on React 18 or earlier (use react-helmet-async)
❌ You're using Next.js and prefer framework conventions (use Next.js Metadata API)