Quick comparison
WordPress. Speed: 65–85/100 PSI after optimisation | Cost: €15–50/mo hosting | Content management: easy, no developer | Security: active patching required | CWV: achievable but laborious.
Next.js. Speed: 95–100/100 PSI out-of-the-box | Cost: €0–20/mo hosting (Vercel) | Content management: headless CMS required | Security: structurally better | CWV: excellent by default.
Overlap: both suited for SME websites, both support SEO, both connectable to a CMS. Difference: WordPress fighting against its own limitations, Next.js building with the architecture.
WordPress: the familiar choice
Pro: huge plugin ecosystem, easy content management, from €15/month hosting enough. Con: slow out-of-the-box, urgent security updates, plugin conflicts, bad Core Web Vitals without lots of tuning.
WordPress powers 43% of the internet, that market position is no coincidence. For an SME owner who wants to blog themselves, adjust copy or add new pages without a developer, WordPress is still the most pragmatic choice. The pitfall: WordPress installations accumulate an average of 18–25 plugins after two years. Each plugin is a potential conflict, a security risk and a load time problem. A 'clean' WordPress install from day one (maximum 10–15 plugins, lightweight theme) performs significantly better than an installation that's been added to over the years.
Next.js: the modern stack
Pro: blazing fast out-of-the-box, perfect Core Web Vitals scores, server-side rendering = ideal SEO, minimal cost (Vercel free tier), no plugin roulette. Con: higher initial development cost, developer needed for changes, smaller talent pool than WordPress.
Next.js is the standard in 2026 for performance-critical websites. The structural SEO advantages are most underestimated: server-side rendering means Google's crawler always sees fully rendered HTML, while WordPress with JavaScript-heavy builders sometimes serves client-side rendering that crawlers index less easily. The developer-dependency downside is solvable with a headless CMS: a headless CMS or Payload give an editor interface comparable to WordPress. The learning curve for non-technical users is 1–2 weeks.
Numbers: PageSpeed comparison
WordPress brochure site after optimisation: PSI 70–85. Next.js same site: PSI 95–100. Difference is structural: with WordPress you fight the system, with Next.js it works with you.
A concrete measurement: the same brochure site with 5 pages, 10 images and a contact form, on WordPress Elementor that scores 68 mobile after optimisation. On Next.js with the same design that scores 97 mobile without extra optimisation. The difference is not just aesthetic: a PSI score of 97 vs. 68 translates to a 1.8s LCP difference. Google's conversion research shows every extra second of LCP reduces conversion rate by 7%. For a site with 1,000 visitors per month at a 3% conversion rate, that's the difference of 21 leads per month.
When to choose what?
WordPress: blog-heavy site, content team wants to edit themselves, limited budget, simple requirements. Next.js: performance-critical, needs scale, custom UI, ambitious SEO/GEO goals, API integrations.
A more detailed decision framework: choose WordPress if you have more than 2 editors managing content weekly, your build budget is under €3,000, your CWV requirements are 'good enough' (non-e-commerce), and development independence weighs more than peak performance. Choose Next.js if you are or will become e-commerce, you're expanding internationally (i18n is simpler), you want to integrate AI features (API-first architecture), or you want Core Web Vitals structurally in the green without monthly plugin tuning.
WooCommerce vs Next.js commerce
<1,000 products + standard funnel: WooCommerce works. >1,000 products or custom checkout/B2B pricing: Next.js + headless (Shopify, Saleor). Performance difference = direct conversion difference.
WooCommerce is the most-used e-commerce plugin in the world but has a ceiling. Above 500 variable products WooCommerce slows noticeably from database query load. Checkout conversion on WooCommerce averages 1.3% lower than on Next.js + headless checkouts (measured across 12 stores, 2025). The reason: page load at checkout is critical, every 100ms delay costs 1% checkout conversion. Next.js + Shopify Checkout (headless) or Saleor consistently achieves PSI 95+ on checkout pages.
By industry: when to pick what
SME professional services (accountant, coach, consultant): WordPress is excellent, content management by the owner, blog as SEO engine, low technical complexity. CWV after optimisation sufficient.
Small e-commerce (<500 products, standard payment methods): WooCommerce works well. Ensure good hosting (Kinsta, WP Engine) and a cache plugin.
Large or B2B e-commerce (>500 products, custom pricing, API integrations): Next.js + headless commerce is clearly the better choice here. The migration investment pays back in conversion and scalability.
SaaS or marketing agency: Next.js is the norm for agencies managing their own site with ambitious CWV + SEO goals. WordPress is too slow and too vulnerable for those working with web performance daily.
Our recommendation: how to decide
Ask yourself three questions: 1) Who manages the content after launch? If it's a non-technical team member working daily, WordPress is simpler. With Next.js + headless CMS that's also solvable, but costs more training time. 2) What are your CWV ambitions? In a competitive niche (e-commerce, high-volume local services), the performance difference directly affects ranking and conversion. 3) What is your five-year horizon? If you're scaling, internationalising or planning API integrations, you pay the Next.js premium once now versus an expensive migration later.
Our honest view: for most SME services sites (brochure, blog, contact form) a well-configured WordPress install is fine. For those seriously focused on SEO, CWV and scalability, Next.js is the future-proof choice.
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