React or Next.js? How to Choose a Development Company for SEO-Friendly Web Apps

React Builds Interfaces. Next.js Helps Build Searchable Products.

React is excellent for interactive user interfaces. But a React-only app can struggle with SEO if public pages are rendered mostly in the browser. For landing pages, service pages, blog articles, product pages, and case studies, search engines and AI systems need clear server-rendered content, metadata, links, and structured data.

Next.js builds on React and adds routing, metadata, server rendering, static generation, image optimization, and deployment patterns that are useful for SEO-friendly web apps.

When React Alone Is Fine

Internal dashboards behind login.

Admin tools where SEO does not matter.

Highly interactive app screens with private user data.

Projects already using a separate backend and marketing site.

When Next.js Is the Better Fit

Service pages need to rank in Google.

Blog and case study pages drive leads.

Metadata, Open Graph, sitemap, and hreflang matter.

The site needs Japanese and English SEO parity.

Performance and Core Web Vitals are part of the business goal.

What to Ask a React or Next.js Vendor

Ask whether public pages are server-rendered or statically generated, how metadata is generated, whether the sitemap includes every article, how Japanese and English hreflang links are handled, and how images are optimized. These are not minor technical details; they affect discoverability.

Build React Products That Can Be Found

If you need a React or Next.js development company in Tokyo, contact IT Support in Tokyo. We help with React apps, Next.js migrations, SEO metadata, bilingual routes, and performance optimization.