Should You Move from Contentful to Sanity?

CMS migrations usually start with frustration.

The bill has crept up. Contentful feels more restrictive than it used to. Editors do not trust preview. Content types have drifted. Developers are nervous about changing old models. A wider Next.js rebuild is already on the table. Someone has seen a better Sanity Studio implementation elsewhere and asks the dangerous question: should we move from Contentful to Sanity?

That cost pressure should not be dismissed. Many of my clients have effectively outgrown Contentful to the point where a properly planned migration is cheaper than continuing to pay increased Contentful costs year after year. When the CMS bill starts shaping architecture decisions, the platform review is no longer theoretical.

That can be a good question. It can also be a distraction.

Contentful and Sanity are both credible headless CMS options. The decision is rarely about which CMS is best in the abstract. It is about whether the target model improves how your team creates, previews, validates, publishes, and renders content.

If you are already considering the move, my Contentful to Sanity Migration service is there for the implementation side. This article sits one step earlier. It is about deciding whether the migration is worth doing at all.

When Contentful May Still Be the Right Answer

The least dramatic answer is sometimes the correct one: stay where you are.

If your Contentful model is clear, editors are comfortable, preview works, integrations are stable, and the delivery team understands the implementation, moving CMS may create more risk than value.

That is especially true when the pain is not really caused by Contentful. A slow site might be caused by poor data fetching, weak caching, too much client‑side rendering, or third‑party script cost. A confusing editorial experience might come from an overgrown model that would be just as confusing if copied into Sanity. A fragile release process might be a test and deployment problem rather than a CMS problem.

Contentful may still be the right answer when:

• the current content types match real editorial work
• editors can preview and publish confidently
• integrations are stable and documented
• the front end handles Contentful data cleanly
• the team has no strong modelling or workflow pain
• migration risk outweighs the likely benefit

Do not migrate because the current system feels old. Migrate because there is a specific content, workflow, ownership, or front‑end problem that the new model will solve better.

When Sanity May Become More Attractive

Sanity becomes interesting when the team needs more direct control over content modelling and editorial workflow.

Developer‑controlled schemas can make the model easier to review, version, test, and discuss alongside front‑end code. Sanity Studio can be shaped around editorial tasks rather than left as a generic content‑entry interface. Portable Text can support structured rich content when the team is disciplined about what blocks and annotations are allowed.

That flexibility can help when the site has:

• complex page composition
• reusable content sections
• structured content that needs cleaner modelling
• custom editorial validation
• content workflows that need a tailored Studio
• a Next.js front end that needs more deliberate data contracts
• teams who want schema changes to live closer to engineering review

The word "can" matters. Sanity gives teams room to design a better system. It does not automatically design one for them. A poor Sanity schema can be just as awkward as a poor Contentful model.

Cost is Not the Only Reason to Migrate

Licence costs often start the conversation, but they should not define the architecture.

For some teams, the cost case is strong. Contentful's increased costings can make the status quo difficult to defend, especially when the site has grown into more content types, more users, more environments, more editorial process, or more delivery complexity than the original setup was designed for. In that situation, paying for a careful migration can be cheaper than carrying the higher platform cost indefinitely.

That still does not make migration free. A cheaper CMS bill can disappear quickly if the migration needs content modelling, import scripts, front‑end rewrites, preview rebuilds, redirect validation, editor retraining, QA, and post‑launch monitoring. Cost matters, especially for teams paying for more capacity or restriction than they can justify. It just needs to be counted honestly.

The real cost comparison includes:

• current CMS licence and usage costs
• migration planning and implementation
• editorial retraining
• schema and workflow design
• front‑end data layer changes
• SEO and redirect risk
• launch support
• ongoing ownership

Cost can trigger the review. It should not be the only reason the review ends with a migration.

Look at the Content Model First

Before comparing feature lists, look at the current model.

Are the content types still meaningful? Are old templates shaping current content? Are fields duplicated across entries because nobody knew where they belonged? Are references clear, or do editors have to remember which linked entry controls which part of the page? Are there fields everyone fills in but nobody renders?

These questions matter because a CMS migration is an opportunity to improve the model. It is also an opportunity to move the same mess into a new interface.

For each important content type, ask:

• What does this model represent in plain English?
• Which fields are essential?
• Which fields exist for old implementation reasons?
• Which fields drive SEO, schema, routing, or page composition?
• Which references are meaningful?
• Which choices confuse editors?
• Which validation rules would prevent bad content before publication?

If the current model is healthy, the case for migration has to come from elsewhere. If the model is unhealthy, the migration should start with a modelling review, not an export script.

Look at the Editorial Workflow

CMS decisions are often framed as developer experience decisions. That is too narrow.

Editors need to create content, understand required fields, reuse sections safely, preview draft changes, handle validation errors, and publish without wondering whether the public site will match what they saw in the CMS. If that workflow is already working in Contentful, treat it as an asset. If it is not working, name the failure clearly before choosing a replacement.

Common workflow problems include:

• preview showing published content instead of drafts
• entries that cannot be previewed because they are not full pages
• required fields that are not obvious until build time
• reusable sections that are too easy to break globally
• approval patterns that sit outside the CMS and rely on memory
• editors copying old entries because the model is hard to understand

Sanity Studio can be tailored around content operations, but that tailoring needs design. A custom Studio is only valuable if it makes the editorial job clearer.

Look at the Front‑End Architecture

A CMS migration is also a front‑end migration, even when the URLs and design stay the same.

The Next.js application may currently depend on Contentful field names, GraphQL query shapes, linked‑entry behaviour, asset URLs, preview APIs, webhook payloads, build‑time route generation, or fallback logic. Some of those dependencies will be obvious. Others will be hidden in helpers, tests, sitemap scripts, metadata utilities, and preview routes.

Review:

• data fetching and query boundaries
• static generation and route generation
• revalidation or cache behaviour
• preview mode
• image and asset handling
• page composition
• error handling for missing content
• redirects and headers
• sitemap and metadata generation

This is where a move to Sanity can pair naturally with Migrations to Next.js or headless CMS integration. The CMS choice and the rendering model need to support each other.

Look at SEO and Migration Risk

For a public website, CMS migration risk is search risk.

The public page does not care which CMS stores the content. Search engines see URLs, status codes, rendered HTML, canonical tags, internal links, metadata, structured data, images, headings, sitemaps, and page speed. If those signals change accidentally, the migration can hurt even when every document imported successfully.

Before deciding to migrate, check whether the team can protect:

• public URLs and slugs
• redirects
• titles and meta descriptions
• canonical URLs
• robots directives
• structured data
• internal links
• sitemap inclusion
• rendered body copy
• image metadata
• Search Console monitoring

The article on de‑risking a CMS migration before it starts goes deeper into that planning layer. The short version is simple: do not treat SEO as a post‑launch check. It belongs in the migration design.

Avoid Recreating Contentful Inside Sanity

If you do move, resist the easiest migration plan.

The easiest plan is to copy every Contentful content type into a matching Sanity document type, copy every field, convert rich text mechanically, and update the front end until the pages render. That can work as a temporary stepping stone. It is rarely the best final state.

A useful migration asks what the next phase of the site needs. Which sections should be reusable? Which content should be structured more clearly? Which old fields can go? Which validation should move earlier? Which page types should become simpler for editors? Which references should become explicit rather than implied by naming conventions?

This is where headless architecture consulting is often more useful than tool comparison. The question is not "which CMS has the nicer abstraction?" It is "which model gives this site a clearer publishing and rendering system?"

Prototype Before Committing

You do not need to migrate the whole site to learn whether Sanity is a good fit.

Pick one or two representative content types. Choose something simple enough to finish and complex enough to expose the real issues. An article model, a service page, or a modular landing page can be useful candidates.

Prototype the Sanity schema, Studio editing experience, Portable Text mapping, preview route, Next.js query, rendering output, metadata generation, and validation rules. Then ask editors and developers to use it.

The prototype should answer:

• Does the model feel clearer?
• Does preview work in the way editors need?
• Does the front end query feel cleaner or just different?
• Can validation prevent known mistakes?
• Can the migration script preserve real content safely?
• Does the rendered page match the current public meaning?

If a small prototype already feels awkward, a full migration will not magically become cleaner.

A Sensible Decision Process

A good decision process is calmer than a CMS debate.

Start by auditing the current Contentful setup. Identify the real pain points: cost, workflow, modelling, preview, delivery speed, front‑end coupling, SEO risk, or ownership. Then decide which pain points a move to Sanity would actually improve.

A practical sequence looks like this:

1. Audit the current Contentful model and editorial workflow.
2. Identify technical coupling in the Next.js front end.
3. List SEO, URL, preview, and publishing risks.
4. Define a target Sanity model for one or two representative content types.
5. Prototype Studio, preview, rendering, and validation.
6. Estimate migration, QA, retraining, and cutover work.
7. Decide whether to migrate now, later, or not at all.

"Not now" can be a good decision. So can "fix the Contentful model first". So can "move to Sanity as part of the wider platform migration". The right answer depends on evidence, not preference.

Wrapping Up

Moving from Contentful to Sanity should be a technical and editorial fit decision, not a CMS popularity contest.

Contentful may be the right system if the model works, editors trust it, and the front end is stable. Sanity may be a better fit when the team needs stronger schema ownership, tailored editorial workflows, clearer structured content, and a tighter relationship between content modelling and the Next.js application.

The risk is pretending the choice is only about CMS features. It is really about content meaning, editor confidence, front‑end integration, search preservation, and long‑term ownership.

Key Takeaways

• Stay with Contentful if the current model and workflow are healthy and migration risk outweighs the benefit.
• Consider Sanity when schema ownership, structured content, Studio tailoring, and editorial workflow need to improve.
• Do not make the decision on licence cost alone.
• Review the content model, preview flow, front‑end coupling, and SEO risk before committing.
• Prototype representative content types before planning a full migration.