We use Next.js for all our web applications at ZEIT. This includes all of zeit.co, our documentation and internal applications.
In case of zeit.co we have one Next.js app that covers:
- Static marketing pages (zeit.co homepage and other marketing pages)
- Blog (zeit.co/blog)
- SaaS dashboard (zeit.co/dashboard)
All of this fits really well into Next.js applications.
Besides our own usage Next.js is being used in a diverse set of websites and web applications (e.g. see the showcase: nextjs.org/showcase) including everything from top tier brands to personal websites.