How Leading Companies Improved Performance, SEO, and User Experience by Migrating to Next.js (Real Case Studies)

Why Are Businesses Moving to Next.js?

A website is no longer just an online brochure. It has become one of the most important tools for attracting customers, generating leads, and growing revenue.

While platforms like WordPress, Shopify, Webflow, Wix, and Squarespace help businesses launch websites quickly, many companies eventually look for greater performance, better SEO, improved user experience, and more flexibility.

That's why many leading brands have adopted Next.js, a React framework designed to build fast, scalable, and search engine friendly websites.

Let's look at how some well known companies benefited from making the switch.

Case Study 1: Notion

The Challenge

Notion's marketing website was originally built as a client rendered React application. As the site expanded, the team faced performance issues, large JavaScript bundles, and SEO limitations that made it harder to deliver a fast experience and fully optimize pages for search engines.

The Solution

The engineering team rebuilt the marketing website using Next.js, taking advantage of static generation and server side rendering to deliver important content before the page reached the browser.

Results

According to Notion's engineering team:

• Lighthouse Performance score improved from around 50 to 97
• JavaScript bundle size decreased by 93%
• Total page weight was reduced by 75%
• Marketing pages became easier for search engines to crawl and index

These improvements created a faster experience for users while strengthening the website's technical SEO.

Official Source:

https://www.notion.com/blog/migrating-notion-marketing-to-next-js

Case Study 2: Sonos (eCommerce)

The Challenge

Sonos wanted to deliver a premium online shopping experience without being limited by a traditional ecommerce frontend. The company needed greater flexibility, faster releases, and better performance.

The Solution

Instead of replacing its commerce platform, Sonos adopted a headless architecture, using Next.js as the customer facing frontend while keeping its existing ecommerce backend.

Results

After adopting Next.js and Vercel, Sonos reported:

• 75% faster build times
• 10% improvement in performance scores
• Faster deployments
• Greater developer productivity
• More flexibility to build custom shopping experiences

This demonstrates that businesses don't always need to replace Shopify or another ecommerce platform they can modernize the frontend while keeping the backend they already trust.

Official Source:

https://vercel.com/customers/sonos

Case Study 3: Nikkei

The Challenge

Nikkei, wanted to improve website performance while supporting millions of readers across multiple devices.

The Solution

The company focused on modern web performance using Next.js and Vercel to deliver faster pages and a better reading experience.

Results

According to Vercel, Nikkei achieved:

• Faster page loading
• Improved Core Web Vitals
• Increased organic traffic
• Higher subscriber engagement
• Better daily user activity

These improvements demonstrate how website performance can directly contribute to business growth when combined with a strong content strategy.

What These Companies Have in Common

Although Notion, Sonos, and Nikkei operate in different industries, they migrated to Next.js for similar reasons:

• Faster website performance
• Better Core Web Vitals
• Stronger technical SEO
• Improved user experience
• Greater flexibility for customization
• Easier long term scalability

They weren't simply following a technology trend. They invested in a faster and more flexible platform because website performance directly affects customer satisfaction, search visibility, and business growth.

Should You Migrate to Next.js?

If your website is built with WordPress, Shopify, Webflow, Wix, Squarespace, or another platform, migrating to Next.js doesn't necessarily mean replacing everything.

Many businesses keep their existing CMS or ecommerce platform while rebuilding only the frontend with Next.js. This approach allows them to continue managing content, products, and orders while delivering a faster, more modern experience to visitors.

For businesses that rely on organic traffic, lead generation, or online sales, investing in website performance can improve user engagement and create a stronger technical foundation for SEO.

Conclusion

The success of companies like Notion, Sonos, and Nikkei shows that website performance is more than a technical improvement it's a business advantage.

By adopting Next.js, these companies created faster websites, improved user experiences, strengthened their SEO foundations, and built platforms that can scale with their future needs.

If your current website feels slow, struggles with Core Web Vitals, or limits your ability to create a modern customer experience, migrating to Next.js could be the next step toward building a faster, more competitive online presence.