What is Next.js? Explained for businesses, plus Next.js vs WordPress

Next.js is an open source framework for building websites and web applications with React, developed by the company Vercel together with the community. In short, it gives developers a ready-made structure for fast pages that can be generated on the server or in advance, which helps both website speed and indexing in Google.

If you have received a quote for a site “built in Next.js” and are wondering what that means, how it differs from WordPress and whether it is the right choice for your company, this article answers without unnecessary jargon. We are also open about the situations in which Next.js is not the best option.

01What Next.js is, in plain terms

To understand Next.js, you need to start with React. React is a JavaScript library, originally created at Meta, used to build web interfaces from reusable components: a menu, a form, a product page. React handles the interface well, but it says nothing about how pages are organised, how data is loaded or how the site gets onto a server.

Next.js fills these gaps. A framework is a foundation to work on: a set of ready-made rules, structures and tools on which developers build the project. Among other things, Next.js provides routing (the way page addresses correspond to files in the project), several ways of generating pages, image and font optimisation, and the ability to write server logic in the same project, for example for forms or integrations.

• Developer: Vercel, with contributions from the open source community.
• Licence: MIT, one of the most permissive open source licences; it can be used free of charge in commercial projects too.
• Language: JavaScript or TypeScript, on top of React.
• Hosting: on the Vercel platform, but also on other cloud services or on your own server running Node.js.

02Server rendering and static generation: why they matter

“Rendering” means the moment and place at which the page's HTML is built, in other words what the browser sees and what Google reads. This is where Next.js differs from a plain React application, in which the page is usually only built in the visitor's browser.

• Static generation: pages are built in advance, at publication, and served very quickly. Suited to pages that do not change on every visit, such as company pages or articles.
• Server rendering: the page is built on the server on demand, with up-to-date data. Useful for content that changes often or depends on the user.
• Periodic regeneration: static pages can be refreshed after an interval or on demand, without a full republication of the site.
• Interactive components in the browser: where interactivity is needed, such as a configurator or a product filter.

The practical advantage is that each page can use the right method. The company's presentation page can be static and very fast, while the customer account can be rendered on the server, with personalised data, in the same project.

03Next.js and SEO: the practical advantages

For SEO, the main advantage is that Google receives a complete HTML page directly, with text, headings and links, without depending on JavaScript running to see the content. Added to this is fine control over the elements that matter for search.

• Titles and meta descriptions set for each page, from the code or from the CMS.
• Structured data (JSON-LD) generated automatically from the content, for example for articles, products or the company.
• A sitemap and robots file generated from the same source as the pages, so they do not fall behind.
• Image and font optimisation, which helps the speed metrics in Core Web Vitals.
• Clean, readable addresses organised according to the site's structure.

04Next.js vs WordPress: the differences that matter for a business

The comparison is not perfectly symmetrical. WordPress is a complete content management system (CMS), with an admin panel, themes and plugins. Next.js is a framework for developers, on which a website or application is built. Still, for a company choosing the technology for a new website, the question makes sense.

• Content management: WordPress has an admin panel built in; with Next.js you connect a separate CMS (for example a headless CMS) or manage content through code.
• Flexibility of design and functionality: Next.js offers complete control; WordPress offers many ready-made solutions, but deep customisations can become complicated.
• Speed: Next.js starts from a fast foundation; with WordPress, speed depends heavily on the theme, plugins and hosting.
• Maintenance and security: WordPress needs regular updates to the core, themes and plugins; Next.js has fewer publicly exposed components, but its dependencies also need updating.
• Who makes the changes: in WordPress, the team can edit and build pages on its own; in Next.js, changes to structure and functionality go through a developer.
• Ecosystem: WordPress has a huge community and many providers; Next.js has a large ecosystem of React developers.

05When a CMS such as WordPress is better

Next.js is not the right answer for every project. There are clear situations in which WordPress or another ready-made platform is the more sensible choice.

• The marketing team wants to create new pages often, with different structures, without calling on a developer.
• The site has standard requirements, well covered by a theme and a few trusted plugins.
• There is no technical partner available long term for changes and updates.
• The initial budget is very limited and the site needs to launch quickly.
• You need a feature that a mature plugin already handles well.

There is also a combined option: WordPress used only as the place where content is managed, with the visible part of the site built with Next.js. It is a valid solution in some cases, but it adds complexity and means maintaining two systems, so it is worth choosing only when the advantages are clear.

06What the cost of a Next.js website depends on

The Next.js licence is free, but that does not in itself make a project cheap or expensive. The cost of a website or application built with Next.js comes from the work required and the services around it, as with any custom-built project.

• The number of page types and the complexity of the design: a company website with a few templates is very different from a platform with dozens of screens.
• The CMS chosen for content and how much it needs configuring for your team.
• Integrations: CRM, ERP, payments, invoicing, booking systems or other internal applications.
• Features with their own logic: customer accounts, calculators, configurators, protected areas.
• Hosting and connected services, whose plans change periodically and should be checked on the providers' official pages.
• Maintenance after launch: dependency updates, monitoring, small changes.

For a simple site with standard requirements, a ready-made solution may be more economical at the start. Next.js shows its advantages when the project has requirements that, on a standard platform, would call for many compromises or many combined extensions.

07Questions to ask before choosing Next.js

1. 1Who will manage the content, and how often? Which CMS does the technical team propose for this?
2. 2Where will the site be hosted, and who is responsible for hosting, backups and monitoring?
3. 3Will the source code and accounts (domain, hosting, CMS) belong to your company?
4. 4How will security updates to dependencies be handled after launch?
5. 5What happens if you want to change supplier? Is the project documented well enough for another team?

08How WEB-AZ works with Next.js

We use Next.js for custom websites and web applications where speed, technical SEO, control over design and integrations with other systems justify a purpose-built solution. When requirements are standard and the team wants maximum editing autonomy, we openly recommend options such as WordPress too. We start from what the website needs to do for your business and only then choose the technology.