Next.js vs a Website Builder (Wix, Squarespace): When a Growing Company Should Switch

A website builder such as Wix, Squarespace or Duda is a hosted product. You rent the editor, the templates, the hosting and the business features (forms, bookings, a store, member accounts) as one subscription. Next.js is an open-source React framework. It gives developers the building blocks for pages, routing, data fetching and server code, and the site runs on whatever hosting you choose.

So the comparison is not really "which tool is better". It is a question of who owns the parts. On a builder, the vendor owns the code, the hosting and the upgrade schedule, and you get a fast start with very little maintenance. With Next.js, you own the code and decide where it runs, and you take on the work that the vendor used to do. Most growing companies do not need to switch on day one. The useful question is which signals mean the builder has started to cost more than it saves.

This is the most common reason people give for leaving a builder, and the data no longer supports it. The HTTP Archive's 2025 Web Almanac, published in January 2026, measured the share of each platform's sites that pass all three Core Web Vitals on mobile. Duda led with 85%. Wix rose from 55% to 74% in a year. WordPress, by contrast, remained among the lowest at 45%. The same report puts Wix at about 5% of sites that use a CMS and Squarespace at roughly 3%.

The lesson is that platform defaults matter more than the label "custom". A builder ships tuned image handling, caching and hosting to every customer at once. A custom Next.js site can be faster, but only if someone designs it to be: large client-side bundles, unoptimised third-party scripts or heavy fonts can make a hand-built site slower than the template it replaced. If your only complaint is speed, measure your real field data in Search Console first. A rebuild is rarely the cheapest fix.

The bigger difference shows up when you want to leave. Wix's help centre states that a Wix site "needs to be hosted and operated on Wix's servers" because its architecture does not support external hosting. You can connect a domain bought elsewhere, but the site itself cannot move. In practice, moving off a builder means rebuilding the design and templates, re-entering or scripting the content that does not export, and redirecting every URL, and that cost grows with every page you add. Owning the code does not make you immune to change, but it turns a future move to another host into a deployment task rather than a redesign.

Squarespace does offer an export, but it is a WordPress-format XML file of selected content. Its help page, last updated in October 2026, lists what is left out:

We use these signals when a company asks whether it is time to move. One signal on its own is usually a workaround problem. Three or more, and the builder is likely holding the business back.

Next.js removes the lock-in at the hosting layer. Its documentation lists four ways to deploy: a Node.js server or a Docker container, both of which support every feature, a static export to any web server with limited features, and platform adapters, such as the verified one for Vercel. That flexibility is the point, but it comes with responsibilities that a builder used to carry for you.

Security is the clearest example. On December 3, 2025, the React team disclosed CVE-2025-55182, a flaw in React Server Components rated CVSS 10.0 that could let an unauthenticated attacker run code on the server. Next.js was among the affected frameworks, and the advice was to upgrade immediately, with patched releases for every line from 13.3 to 16.1. Follow-up advisories continued into January 2026. On a builder, the vendor patches this for you. On your own stack, someone has to watch advisories and ship the update the same week.

You do not always have to choose between staying and rebuilding everything. Wix Headless lets you take an editor-built site's front end off Wix, host your own, for example a Next.js app, and keep managing the business from the same dashboard. According to Wix's developer documentation, the catalog, bookings, courses, forms, members, orders, custom backend code and automations stay as they are. Checkout and login can still run on Wix-hosted pages on a subdomain.

The same documentation is clear about the trade-off: you take on hosting, authentication and SEO for the new front end, you still need a Wix Premium plan for a custom domain and payments, and you must add permanent redirects from old paths. This is a good first step when the pain is the front end (design freedom, performance budget, multilingual URLs) rather than the business system behind it. It is a poor fit if the goal is to leave the vendor completely, because your data and backend logic still live on Wix.

Answer these with your team before asking anyone for a quote. If most answers are "no", improve the site you have. If most are "yes", plan a migration, and treat it like any site migration: inventory every URL, map redirects and compare traffic before and after launch.