This choice is usually argued on technical grounds and decided by something simpler: whether the people who own the site can change it without a developer.
What they actually are
WordPress is a content management system. The site is assembled from a theme and plugins, and the content lives in a database an administrator edits through a browser.
Next.js is a React framework. The site is built from code. Content can come from a headless CMS, from files, or from a database — but the structure is authored by a developer.
Where WordPress wins
- Non-technical editing. Your marketing person adds a page without touching a repository.
- Plugin availability. Bookings, memberships, forms, multilingual — someone has already built it.
- Hiring. The pool of people who can maintain it is enormous.
- Time to launch. A theme-based site goes live faster.
Where Next.js wins
- Performance. Statically generated pages with no plugin stack are fast by default, which matters for Core Web Vitals.
- Security surface. No plugin ecosystem to keep patched. Most WordPress compromises come through outdated plugins.
- Application-like features. Dashboards, calculators, interactive tools sit naturally in React.
- Control. The output is exactly what you wrote.
Two claims to discount
"WordPress is slow"
Badly built WordPress is slow. A lean theme with few plugins, proper caching and optimised images performs perfectly well. The slowness attributed to WordPress is usually attributable to a page builder and twenty plugins.
"Next.js is better for SEO"
Both can rank. Search engines do not reward a framework. What they respond to is fast, server-rendered, well-structured content — achievable in either, and achievable badly in either. We have seen a Next.js site ship an empty page to crawlers because of one misplaced boundary.
The question that decides it
Who edits this site in six months?
- A non-technical team member, frequently → WordPress, or Next.js with a proper headless CMS. Not Next.js with content in code.
- A developer, rarely → Next.js.
- Nobody, it barely changes → either; pick on build cost.
The failure we see most is a Next.js site with content hardcoded, handed to a team who then need a developer to fix a phone number.
The middle path
Next.js with a headless CMS — Sanity, Contentful, Payload — gives editors an interface while keeping the front end fast and controlled. It costs more to set up than either pure option and is often the right answer for a content-heavy business site.
Migrating between them
Possible in both directions and neither is trivial. The technical move is the smaller half; preserving URLs, redirects and rankings is the larger one. A migration that drops the redirect map loses the traffic the site had.
Do not migrate for its own sake. Migrate when the current stack is actively blocking something specific.
Whichever you choose, performance is the part that shows up in rankings: see Core Web Vitals in plain language. Cost bands are in what a business website costs.