Migrating from WordPress to a Modern Stack: What to Expect

Why Businesses Are Leaving WordPress

WordPress has been the default choice for websites for over two decades. It powers roughly 43% of the web, and for good reason — it’s flexible, well-supported, and has an enormous ecosystem. For a long time, “I need a website” was basically synonymous with “I need WordPress.”

But things have changed. The web development landscape has evolved dramatically, and an increasing number of businesses are migrating away from WordPress to what’s often called a “modern stack.” As someone who has handled many of these migrations for clients across Cambridgeshire and beyond, I want to give you an honest picture of what the process actually looks like — the good, the challenging, and the things nobody tells you.

What Is a “Modern Stack”?

A modern stack typically combines several technologies that each handle a specific job well, rather than relying on one monolithic system to do everything.

The Front-End Framework

This is the technology that generates the pages your visitors see. Popular options include:

Astro — my personal favourite for most business websites. It generates static HTML by default, resulting in incredibly fast pages, but can add interactivity where needed.
Next.js — a React-based framework that’s excellent for more complex, interactive applications.
SvelteKit — known for its simplicity and performance, gaining popularity rapidly.

The Content Management System

Instead of WordPress’s built-in admin, modern stacks typically use a headless CMS — a system that manages your content but doesn’t dictate how it’s displayed. Options include Sanity, Contentful, Keystatic, and others. Some projects use Markdown files directly, which is simpler but less user-friendly for non-technical editors.

The Hosting Platform

Modern websites are typically hosted on platforms like Netlify, Vercel, or Cloudflare Pages. These serve your site from a global CDN (Content Delivery Network), meaning your pages are delivered from the server closest to each visitor. They’re often free or very cheap for small to medium-traffic sites.

Why Migrate? The Honest Benefits

Dramatic Performance Improvements

This is the most immediately noticeable difference. WordPress sites, even well-optimised ones, typically score 50-70 on Google’s PageSpeed Insights for mobile. Modern stack sites routinely score 95-100.

The reason is architectural. WordPress generates pages dynamically — every visit triggers PHP code, database queries, and page assembly. Modern frameworks pre-build pages as static HTML at deployment time. When someone visits your site, the server simply sends a pre-built file. No database, no PHP, no processing. It’s as fast as the web gets.

For one client migrating from WordPress, their homepage load time went from 3.8 seconds to 0.9 seconds. Their Google PageSpeed score went from 42 to 98. They didn’t change a word of content — the improvement was purely architectural.

Vastly Better Security

WordPress’s popularity makes it the most attacked CMS on the internet. The combination of PHP, a MySQL database, plugins from thousands of different developers, and a well-known admin URL creates a substantial attack surface.

A static site served from a CDN has essentially no attack surface. There’s no database to inject into, no admin panel to brute-force, no PHP to exploit, and no plugins to compromise. The security improvement is not incremental — it’s categorical.

Lower Ongoing Maintenance

WordPress sites require constant attention: core updates, plugin updates, theme updates, PHP version updates, database optimisation, security monitoring. Skip any of these and you’re accumulating technical debt and security risk.

Modern stack sites require far less maintenance. There’s no PHP to update, no database to optimise, and no plugin ecosystem to manage. Updates to the front-end framework are straightforward and don’t carry the same risk of breaking your site.

No More Plugin Dependencies

This is a big one. WordPress’s power comes from its plugin ecosystem, but it’s also its Achilles’ heel. Plugins conflict with each other, slow your site down, introduce security vulnerabilities, and sometimes just stop being maintained.

With a modern stack, functionality is built into the codebase. It’s purpose-built for your site, tested as a unified whole, and doesn’t depend on third-party developers maintaining their code.

Better Developer Experience

This might not seem relevant to you as a business owner, but it affects you indirectly. Modern frameworks are more enjoyable for developers to work with. This means the developer you hire is more productive, makes fewer mistakes, and can implement changes more quickly. That translates to lower development costs and faster turnaround times.

The Challenges: What Nobody Tells You

I’m not going to pretend migration is all sunshine. There are real challenges, and you should go in with your eyes open.

The Content Editing Experience Changes

If you or your team are comfortable editing content in WordPress — using the block editor, creating pages, uploading media — you’ll need to adapt to a new system. Headless CMS platforms have their own editing interfaces, and while many are excellent, they’re different from what you’re used to.

Some are more user-friendly than others. Sanity, for example, offers a highly customisable editing experience that can be tailored to exactly how your team works. Keystatic is simpler and more straightforward. The key is choosing the right CMS for your team’s comfort level.

Some WordPress Features Don’t Have Direct Equivalents

WordPress has solutions for almost everything — contact forms, event calendars, booking systems, membership areas. In a modern stack, some of these require custom development or third-party services.

Contact forms might use a service like Formspree or Resend. Comments might use a service like Giscus. Search might use Algolia or Pagefind. These solutions often work better than their WordPress plugin equivalents, but they require more intentional setup.

You Need a Developer

WordPress’s greatest strength for non-technical users is that you can make significant changes — adding pages, changing layouts, installing plugins — without writing code. With a modern stack, structural changes to your website typically require developer involvement.

Content changes (text, images, blog posts) can be handled through the CMS without developer help. But adding a new section type, changing the layout of a page template, or adding new functionality usually requires a developer.

This isn’t necessarily a disadvantage — many business owners prefer having a developer handle these things anyway. But it’s important to understand upfront.

The Migration Itself Takes Time

A thorough migration isn’t a weekend project. Depending on the size and complexity of your WordPress site, expect the process to take two to six weeks. Larger, more complex sites take longer.

The Migration Process: Step by Step

Here’s what a typical WordPress-to-modern-stack migration looks like when I handle it for clients.

Phase 1: Audit and Planning

Before touching any code, I thoroughly audit the existing WordPress site:

Content inventory. What pages, posts, and custom content types exist? What needs to migrate?
Functionality audit. What plugins are installed? What do they do? What’s essential and what can be eliminated?
SEO baseline. What are the current rankings, traffic levels, and indexed pages? We need to preserve these.
Redirects map. If any URLs are changing, we need a complete redirect plan to preserve SEO equity.
Analytics review. What are the most important pages and user journeys?

Phase 2: CMS Setup and Content Migration

Next, we set up the headless CMS and migrate your content:

Define the content model. How should your content be structured in the new system? This is an opportunity to improve on WordPress’s approach.
Migrate content. Text, images, metadata — everything moves to the new CMS. This can often be automated for large volumes of content.
Set up editorial workflows. How will your team create and publish content going forward?

Phase 3: Design and Development

The new front-end is designed and built:

Design. This is an opportunity to refresh your design, but it’s not mandatory. We can replicate your existing design if you prefer.
Build. The front-end is built using the chosen framework, pulling content from the CMS.
Functionality. Contact forms, search, filtering, and any other interactive features are implemented.
Performance optimisation. Images, fonts, and assets are optimised for maximum speed.

Phase 4: Testing and SEO Verification

Before going live, everything is thoroughly tested:

Cross-browser and cross-device testing. Does everything work on Chrome, Safari, Firefox, Edge? On phones, tablets, desktops?
Content verification. Is all content present and correctly formatted?
Redirect testing. Do old URLs correctly redirect to new ones?
Performance testing. Are Core Web Vitals in the green?
SEO checklist. Meta tags, structured data, sitemap, robots.txt — everything checked.

Phase 5: Launch and Monitoring

The switch happens:

DNS update. Your domain is pointed to the new hosting.
Monitoring. We closely watch for any issues in the first few days — broken links, missing content, unexpected behaviour.
Search Console. We monitor Google Search Console for any crawl errors or indexing issues.
Performance baseline. We establish new performance and traffic baselines for ongoing comparison.

Preserving Your SEO

This is the concern I hear most often, and it’s completely valid. If you’ve built up search rankings over years, the last thing you want is to lose them in a migration.

The good news is that a well-executed migration should preserve and often improve your rankings. The key is:

301 redirects for any URLs that change. This tells Google the content has moved, not disappeared.
Preserving meta tags and structured data on every page.
Maintaining content quality — don’t cut content during migration.
Submitting an updated sitemap to Google Search Console.
Monitoring rankings closely for several weeks post-launch.

It’s normal to see minor fluctuations in the first few weeks after migration. Google needs time to recrawl and reassess your site. But with proper redirect handling, rankings typically stabilise within a few weeks and often improve thanks to the performance gains.

Is It Worth It?

For most businesses I work with, the answer is yes. The combination of dramatically better performance, improved security, lower maintenance burden, and a more flexible architecture makes a compelling case.

But it’s not right for everyone. If your WordPress site is working well, your traffic is modest, and you don’t have the budget for a proper migration, there’s nothing wrong with staying put. WordPress isn’t going anywhere, and a well-maintained WordPress site can serve you perfectly well.

The businesses that benefit most from migration are those that are feeling the pain — slow performance, constant maintenance headaches, security concerns, or limitations that are holding back their growth.

If any of that sounds familiar, get in touch. I’ll take a look at your current WordPress site, give you an honest assessment of whether migration makes sense, and walk you through exactly what the process would look like for your specific situation.