Last updated on:
|
Reading time:
6 min read
WordPress to Headless CMS Migration: When Sanity, Next.js, and Vercel Make Sense
Adrian Kuleszo
Founder
Share this article
Summarize with AI
Moving off WordPress to a headless setup suits some B2B teams and is an expensive detour for others. This post covers who should move, what each part of the stack does, and what the migration involves.
What headless means
In a headless setup the CMS stores content and serves it through an API, and a separate front end builds the pages visitors see. With WordPress that means editors keep working in wp-admin while a Next.js site fetches the content, or the content moves to a CMS like Sanity and WordPress goes away.
When to stay on WordPress
Stay when the site is a few dozen pages and a plugin or two covers what you need, when WooCommerce sits at the centre of the business, when a large editing team is deeply used to Gutenberg, or when you depend on a plugin with no equivalent elsewhere. WordPress user management, multisite and membership tools take real effort to rebuild in a custom stack, and for these sites a caching plugin and good hosting are usually the cheaper fix.
When to migrate
Four signals point toward headless.
The editing team waits on developers to publish new page layouts, or the content model is squeezed into posts and pages when it needs integrations, case studies and customers as separate linked types.
Plugin updates and security patches take real hours every month, and a bad update has broken the site before.
The same content has to reach a web app, a newsletter, docs or AI tools as well as the website. Structured content also helps with answer engines, which we cover in AEO for SaaS.
The front end has performance or design requirements that themes and page builders cannot meet.
If none of these apply, a rebuild in Webflow or Framer is usually the lighter move, and our Webflow vs WordPress post covers that path.
Sanity, Next.js, Astro and Vercel
Sanity
Sanity holds content as structured data that you define yourself. Case studies, integrations, pricing tiers and authors become their own types with their own fields, and editors can preview the page as they edit it. Rich text is stored as Portable Text, which converts cleanly to any front end, and the image pipeline handles crops and hotspots. Plan limits change, so check them before you budget.
Next.js
Next.js is the most common framework for headless front ends. It supports incremental static regeneration, so pages are served pre-built and refresh when content changes, and its large ecosystem means most integration problems already have an answer.
Astro
Astro suits content-led marketing sites with little interactivity, since it ships very little JavaScript to the browser by default. Pick Astro when the site is mostly pages and the product app lives elsewhere, and pick Next.js when the site shares components or logic with a React app.
Vercel
Vercel is the natural host for Next.js, with preview deployments on every branch, instant rollbacks and edge delivery built in. The Hobby plan is free and Pro is priced per seat, so check current pricing and count how many people need access.
What a migration involves
Start with a URL inventory. Export every page, pull Search Console and backlink data by URL, and decide which URLs stay identical.
Model the content in Sanity next, so each WordPress post type and custom field has a destination type.
Then write an import script that reads the WordPress REST API, turns posts into Sanity documents and uploads the images, and test it on a copy before touching real content.
Rebuild the templates in Next.js or Astro, match the heading structure and metadata of the pages that rank, and set up previews for the editors.
Write a 301 redirect for every URL that changes and check that each one points to its closest new page, then compare speed against the old site before launch.
After launch, submit the new sitemap, watch 404s and indexing in Search Console, and track conversions for the first weeks.
What we have seen
[Our own headless project: the site type, number of pages, number of editors, time to ship, load times before and after, and the hosting bill. Replace with real numbers or delete this section.]
FAQ
Headless WordPress or Sanity for a marketing site
Headless WordPress is the lower-risk path because content stays where it is and editors keep wp-admin, and the cost is two systems to maintain. Sanity gives a cleaner content model and previews, and the cost is a full content migration.
SEO risk when moving to headless
The risk sits in changed URLs, dropped pages, rewritten copy that no longer matches the query it ranked for, and slower templates. A redirect map, copy that still answers the original query and a speed check before launch cover all four.
Cost of a headless migration
The main cost is developer time, and it scales with page count, content model complexity and how many editors need training. For most marketing sites, hosting and CMS fees are small next to that.
Editors and previews
Editors work in Sanity Studio, or stay in wp-admin if WordPress remains the backend, and previews are set up as part of the front-end build. Training time depends on the team.
Keeping WordPress during the move
Run both until the new front end is tested, keep the old site on its URLs until the redirects are verified, and switch DNS on a day when someone is watching Search Console.
DesignMe handles website migrations for funded B2B SaaS and AI companies. If you are weighing a move off WordPress, send us the site and we will tell you which route fits:
Written by
Adrian Kuleszo
What to read next?
need more info?
What does DesignMe actually help with?
We help B2B tech companies design and build the things they need to grow, from brand identity and websites to web apps, mobile apps, product design, design systems, backend logic, APIs, infrastructure, and agentic AI workflows. Most clients come to us when their brand, product, or website no longer matches where the company is going, or when they need one senior team to take an idea from strategy to launch.
Do you only design, or can you also build?
We can do both. Our team covers strategy, brand, product design, UX/UI, web design, motion, Framer, Webflow, frontend development, backend logic, APIs, infrastructure, mobile app builds, and AI workflows. Some clients bring us in only for design. Others use us as a full product team from idea to launch.
Can you take a project from strategy to launch?
Yes. We can help shape the scope, define user flows, design the experience, build the product or website, and support the launch. Depending on the project, we can work as your full execution team or plug into your existing product, marketing, or engineering team.
What kind of companies do you work with?
We’re best for B2B tech, SaaS, AI, fintech, web3, and product-led companies that need senior design and development support without hiring a full in-house team. Usually, our clients already have a product, funding, traction, or a clear business case for improving their brand, product, website, or internal workflows.
What does it cost to work with DesignMe?
Monthly retainers usually range between $6k and $10k/month, depending on scope, speed, team setup, and how closely we need to work together. For lighter ongoing design support, we can work mostly async with structured updates every 48 hours. For more active product, website, or brand projects, we usually run weekly or twice-weekly calls with regular progress updates. For fast-moving launches or complex builds, we can increase the cadence with more frequent calls and daily updates. Focused project scopes usually start from $10k+. Larger brand, product, website, mobile app, AI workflow, or development projects can be higher depending on complexity. Once we understand what you need, we’ll suggest the leanest setup that can realistically get the work done well.
How soon can we start working together?
It depends on our current capacity, but we usually onboard new clients within 1–2 weeks. If something is urgent, tell us during the first conversation and we’ll let you know what’s realistic.
