Next.js 16 vs Fastify + React

Next.js 16

VPS (Bun)

The React meta-framework running on Bun runtime. Built by Vercel, Next.js supports SSR, SSG, ISR, and streaming—all configured per-route. This variant uses Bun runtime for potentially faster startup times and request handling. The App Router architecture brings React Server Components, nested layouts, and Server Actions. While Bun support for Next.js is unofficial, it works in practice and offers a comparison point for runtime performance. Ideal for teams wanting to benchmark Node.js vs Bun performance with their Next.js applications.

Fastify + React

VPS

Node.js high-performance web framework combined with React SSR. Fastify is one of the fastest Node.js frameworks, built on a robust plugin architecture with JSON Schema validation and automatic OpenAPI documentation. This implementation uses Fastify as the server with custom React SSR integration. Fastify's encapsulation model keeps plugins isolated, while hooks provide fine-grained request lifecycle control. Ideal for teams with existing Node.js/Express experience who want better performance and structure. Fastify's plugin ecosystem covers everything from rate limiting to WebSocket support.