Headless WordPress Agency: Faster Sites, Same CMS

Headless WordPress development is a rebuild that keeps WordPress running as the content backend while replacing the PHP theme layer with a modern frontend built in Next.js or Astro. It's for marketing teams and agencies sitting on years of content, custom post types and trained editors who can't justify a full CMS migration but need pages that load in under a second instead of four. Editors keep writing in wp-admin exactly as before -- nothing changes on their side. What changes is everything the visitor touches: WordPress serves content through the REST API or WPGraphQL, and a static or server-rendered frontend on Vercel handles the actual page delivery. Engagements run 6 to 12 weeks depending on how many custom blocks, forms and content types need frontend components -- roughly three to four times longer than a traditional theme rebuild, but delivering a Lighthouse jump most theme optimisation can't touch. Pricing is fixed-fee, scoped after an audit of your plugins, custom fields and URL structure -- see our pricing page for how we structure that. This isn't the right move for every WordPress site. Greenfield builds with no existing content, heavy WooCommerce checkout flows, or editorial teams who rely on drag-and-drop page builders are better served by a different stack entirely. But if your content and editors are the asset worth protecting and your frontend is the liability, headless WordPress is the fastest way to fix that without touching what already works.

Who this is for -- and when it's the wrong choice

Headless WordPress works best when the CMS itself isn't the problem -- the frontend is. If any of this sounds familiar, it's a strong fit:

• You've got 3+ years of content, established URL structures and internal linking that took years to build
• Your data model runs on Advanced Custom Fields, and rebuilding that schema in Sanity or Payload means weeks of migration work for no editorial benefit
• Your editors are trained on wp-admin and retraining is a real line item, not a hypothetical
• You need results in 8-12 weeks, not the 6+ months a full platform migration usually takes

It's the wrong choice when:

• The project is greenfield with no existing content -- a purpose-built headless CMS like Payload or Sanity has a cleaner starting point
• You're running WooCommerce with complex checkout and subscription logic -- that needs dedicated headless commerce work or a platform built for it
• Non-technical editors need visual, drag-and-drop page building -- headless WordPress loses that layer entirely
• Real-time multi-author collaboration matters more than raw page speed

We'll tell you on the first call if headless isn't the right move. Sometimes the right answer is a full migration off WordPress instead.

How we do it

We scope every headless WordPress project in five phases, and you get a defined deliverable at the end of each one before the next starts.

1. Audit (1 week) -- we map every content type, custom field, plugin dependency and URL structure. You get a written report of what breaks and what doesn't.
2. Data layer (1-2 weeks) -- WPGraphQL gets configured with the extensions your content model needs (ACF, custom blocks, SEO fields), and every query gets validated against your real data, not a demo site.
3. Frontend build (3-5 weeks) -- component library, page templates, navigation, forms and search get built in Next.js or Astro.
4. Preview and editorial tooling (1 sprint) -- draft previews, revision handling and editorial workflow validation. This is the phase most agencies skip, and the one that generates the most support tickets after launch.
5. Launch -- redirect mapping, CDN configuration, Lighthouse validation and monitoring.

We default to WPGraphQL over the REST API because one query pulls a post, its author, categories, featured image and SEO metadata in a single round trip -- the REST API needs four to six separate calls for the same archive page. Every frontend ships in TypeScript with Tailwind CSS for styling, deployed to Vercel's edge network.

At the end, you get a production frontend, a written audit of your plugin stack, and wp-admin exactly as your editors left it. Pricing is fixed-fee, quoted after the audit.

What we've shipped

Two of our production builds are headless WordPress migrations end to end.

SleepDr, a sleep medicine practice, moved from WordPress to Next.js 15 + Payload CMS + Supabase with a HIPAA-safe architecture -- patient forms run through HIPAA-compliant Jotform, so no PHI ever touches our servers. The build included medical schema, 20 city landing pages and four-language support. Lighthouse went from 35 to 94. The client left a verified 5.0 Clutch review.

bdManagedIT, a Central-Georgia managed IT provider, rebuilt from WordPress onto Astro + Sanity + Netlify. The result: 95+ PageSpeed, zero-JS static pages across service, industry and location pages, plus HIPAA/PCI-DSS/CJIS/SOX compliance guides, HubSpot CRM integration and full AI-search schema.

Both kept their existing content and editorial teams. Both replaced the frontend entirely. See more in our work.

Sources

A few technical references worth reading if you want to check the claims above yourself: the WordPress REST API handbook and the WPGraphQL documentation cover the two data-layer options directly. Google's Core Web Vitals guidance explains why the Lighthouse gap matters for rankings, and its redirect documentation is the standard to follow when you remap URLs during launch.

If your WordPress site is the thing holding your marketing team back -- not the CMS, the frontend -- get in touch and we'll audit your plugin stack and content model on the first call, no charge.