The Case Against Headless WordPress

Going headless gives teams more flexibility, speed, and control over digital experiences. If your organization is at an inflection point, decoupling WordPress from the front end and using it as a backend CMS might seem like an obvious choice. It’s familiar, open-source, and free—so why not just make it headless instead of switching platforms?

The catch is that what looks like a quick win rarely is. While some large-scale sites do run headless WordPress, the reality is often messy, time-consuming, and costly. Let’s look at what headless WordPress actually entails, why it’s not the easy win it appears to be, and how an API-first, natively headless CMS can make more sense in the long run.

The Monolithic Roots of WordPress

To understand the challenges of making WordPress headless, it helps to look at its history. Released in 2003, WordPress has always been a monolithic CMS, combining content management, theme rendering, and plug-ins in a single codebase. 

It’s maintained by the nonprofit WordPress Foundation and primarily developed by Automattic, whose business model centers on services for traditional WordPress sites. That leaves little incentive to rebuild it as an API-first, headless CMS.

On top of that, millions of sites have relied on WordPress for decades, making backwards compatibility a priority. While this stability is a strength, it also makes radical changes to the underlying codebase difficult.

REST API, Graph QL, and Plug-in Dependency

At the heart of the issue is the fact that making WordPress headless involves architectural changes that affect 3rd-party plugins. If you want to make a WordPress site headless, you have two main options:

• REST API: WordPress’s native REST API lets you separate the frontend from the backend and work with frameworks like React or Next.js. But many features that are viewed as table stakes–such as content previews–aren’t possible without relying on 3rd party plugins.

• GraphQL: GraphQL is widely used for headless frontends, but using it with WordPress requires a plugin. On top of that, every major plugin your site relies on—like Advanced Custom Fields, Yoast SEO, or Gravity Forms—needs its own GraphQL-compatible extension, effectively doubling the number of plugins you need to run the site. 

We’ve found this dependency on 3rd party plug-ins to increase the complexity of projects and make sites less reliable. On top of that, many of these plugins lack comprehensive documentation. That means compatibility problems often remain hidden until encountered during development, at which point they become very messy, time-consuming problems to solve. 

Monolithic Plugins in a Headless World

A good example of how complicated things can get is when you try to adapt Gravity Forms to a headless environment. Gravity Forms is one of the most popular plugins for WordPress. For monolithic websites, installing it is just a matter of uploading the plugin, activating it, and configuring your forms. Odds are good that an organization making the move to headless WordPress will want to keep using Gravity Forms. Unfortunately, that’s a lot easier said than done.  

REST API will allow for basic functionality, but many advanced features–like multipage forms, file uploads, and integrations like reCAPTCHA V3–are not fully supported out of the box. To make these features work, you need to either adopt specific 3rd party plugins or custom build a solution. There’s a plugin to bring Gravity Form’s functionality into WordPress GraphQL, but it too doesn’t support advanced features like reCAPTCH V3. 

Add to this the fact that every plugin is from a different developer, with differing levels of documentation and support, and you quickly find that implementing a core plugin like Gravity Forms is far more complex than it would be in a traditional monolithic environment. 

If You Want to Go Headless, Go Headless

It’s possible to convert a car into a watercraft—add floats, seal the undercarriage, swap wheels for a propeller—and you might get something that crosses a lake. But would it be fast? No. Reliable? Hardly. You can adapt a car for water, but it will never be as good as a boat.

The moral? If you want a boat, buy a boat. The same logic applies to a headless CMS.

Purpose-built platforms like Contentful, Sanity, or Strapi offer a more streamlined, scalable, and future-proof way to build headless sites. They’re designed from the ground up for API-first content delivery across channels, without patching gaps through third-party plug-ins. They also integrate seamlessly with modern frameworks like Next.js or Nuxt.

In short, they deliver on the promise of headless architecture in a way WordPress, no matter how many plug-ins you add, never can.

Foster Made Can Help

Digital technology is constantly evolving; knowing what to adopt and when can be tricky. Whether or not it makes sense to migrate from a monolithic CMS like WordPress to a headless CMS like Contentful comes down to the unique needs of your organization. 

That’s why it’s important to look at the big picture—not just what works today, but what will scale with you tomorrow. At Foster Made, we help organizations evaluate their current content infrastructure, identify pain points, and map out a clear path forward. If going headless makes sense for your team, we’ll guide you through choosing the right platform, planning a smart migration strategy, and building a content architecture that supports growth, flexibility, and performance.