Vercel makes Next.js, but doesn't own it
Vercel created and maintains Next.js, and runs a hosting platform optimized for it. The two are tightly aligned but Next.js is open source and self-hostable everywhere Node runs.
What Vercel adds on top of next start
- Zero-config deploys —
git pushon a connected repo ships to production. - Preview deployments per PR with a unique URL.
- Edge runtime for low-latency middleware/proxy work in 30+ regions.
- ISR distributed across the edge cache (sub-second invalidation).
- Image CDN — no
sharpinstall, served from the edge. - Analytics & Speed Insights for real-user Core Web Vitals.
The self-hosting reality
Self-hosting works, and the docs are honest about what it costs: image optimization needs sharp installed, ISR cache lives in one region by default, no preview URLs, and you operate the SSL/process manager yourself.
Why "Vercel-only" myths are wrong
Server Actions, RSC, streaming, ISR, image/font optimization, Server Actions caching — all run on a vanilla Node server. The Vercel-only features are the platform layer (preview URLs, distributed cache, edge functions), not the framework features.