Next.js is one option among several web application frameworks. The best choice depends on your language, rendering requirements, backend architecture and hosting environment.
Next.js
Language: JavaScript / TypeScript with React
Strong fit for React-based websites, full-stack applications, content-driven sites and applications needing a mix of server and client rendering.
React Router
Language: JavaScript / TypeScript with React
Provides routing and data-loading patterns, including framework capabilities. It is a strong alternative for applications organized around routes, forms and server interactions.
Nuxt
Language: JavaScript / TypeScript with Vue
Offers an integrated framework experience for Vue developers, with routing, server rendering and server-side capabilities.
SvelteKit
Language: JavaScript / TypeScript with Svelte
A framework for Svelte applications, offering file-based routing, server rendering and flexible deployment adapters.
Angular
Language: Primarily TypeScript
A comprehensive framework with its own component model, dependency injection and application conventions. Angular also supports server rendering.
There is no universal winner. Team experience, application requirements, ecosystem support and deployment constraints matter more than framework popularity alone.