Sanity vs Contentful: Customization vs Convention

Sanity and Contentful are both hosted headless CMSs, but they differ in how much of the system you control in code. Sanity’s editing interface is an open-source React application you shape yourself, with schemas written as code and queried through GROQ. Contentful is a proprietary SaaS whose content types are configured in its web app and delivered over REST and GraphQL. That is the whole comparison in one sentence: customization versus convention. Almost every practical difference — modeling workflow, editorial experience, governance, migration effort — follows from it. We build on Sanity and we do not resell Contentful, so read what follows as a fit assessment rather than a recommendation; Contentful is a genuinely good product, and for a large share of organizations it is the correct answer.

At a Glance

The Customization Difference

With Sanity, the editing interface is not a product you log into — it is source code in your repository. Sanity Studio is an open-source React application; you install it, define your schemas as TypeScript files, write custom input components where the default ones are wrong for the job, arrange the document list into whatever structure your editors actually think in, and deploy it wherever you like, including as a route inside your own Next.js app at something like /studio. Content itself lives in Sanity’s hosted Content Lake, and pages query it with GROQ, a query language designed to return exactly the shape a template needs in a single request.

With Contentful, the editing interface is the vendor’s. You define content types in the web app — adding fields, setting validations, arranging the editor layout through configuration screens — and Contentful serves that content over a REST Content Delivery API and a GraphQL endpoint. Customization happens at the edges rather than the center: UI extensions and marketplace apps can replace individual field editors or add sidebar tooling, and the Content Management API lets you script content-type changes so they can be versioned in a repository. What you cannot do is redesign the application itself.

Neither approach is more “correct.” The honest question is whether a custom editorial interface is worth building for your team. If your editors are three marketers publishing blog posts and landing pages, a well-designed standard UI is not a compromise — it is one fewer thing to build, maintain, and onboard people into. If your editors are operating a product catalog with conditional fields, cross-referenced entities, and a publishing workflow that does not resemble anyone else’s, the ability to design that interface stops being a luxury.

Content Modeling Depth

Both platforms model content as typed entries with fields and references, and both handle the fundamentals well: validation rules, localization, draft and published states, and relationships between documents. The difference is where the model lives and how it changes. In Sanity, a schema change is a code change — it goes through a pull request, it is diffable, it ships with the deploy that depends on it, and it can be reasoned about alongside the frontend types generated from it. In Contentful, a content-type change is an action in an environment, promoted between environments through its environment aliasing and migration tooling. That model is auditable and well-governed; it is just governed by the platform rather than by your version control.

Rich content is worth comparing directly, because it is where headless CMSs most often disappoint people. Sanity uses Portable Text, a structured JSON representation of rich text where custom block types are first-class: you can define a “pricing table” or “callout” block, render it however each channel requires, and never store presentational HTML. Contentful’s Rich Text field is also structured JSON, and it supports embedding entries and assets inline, so it shares the important property — content is not a blob of markup. Sanity gives you more freedom to define what the custom blocks are and how they appear in the editor; Contentful gives you a well-documented, consistent node format with mature rendering libraries. Both beat a WYSIWYG HTML field by a wide margin.

On references, both support one-to-many and many-to-many relationships and both can resolve linked entries in a single query. Sanity’s GROQ tends to feel more expressive when a page needs deeply nested or conditionally shaped data, since you write the projection yourself. Contentful’s GraphQL endpoint is more familiar to teams already standardized on GraphQL tooling, and its include depth on the REST API covers most page-level needs without custom query syntax to learn.

Team and Enterprise Considerations

Contentful is one of the oldest and most established API-first CMS platforms, and that maturity shows up in exactly the places large organizations care about: roles and permissions, environment promotion, audit trails, a substantial marketplace of integrations, an established partner and agency ecosystem, and a hiring pool of people who have used it before. When a company runs a dozen product teams across several brands, the value of a conventional platform is not that it is simpler — it is that every team gets the same interface, the same governance model, and the same onboarding path. Standardization is the feature.

Sanity’s customization cuts the other way at that scale. A Studio designed for one team’s workflow is an asset; twelve Studios diverging in twelve directions is a maintenance surface. Organizations that succeed with Sanity at scale usually treat the Studio like any other shared internal application — owned by a platform team, versioned, code-reviewed, with a deliberate design system for its custom inputs. That is a real commitment, and it should be made knowingly rather than discovered later.

The pricing comparison follows the same shape. Both vendors price on some combination of seats, environments, and API usage, and both publish their tiers — sanity.io/pricing and contentful.com/pricing. We deliberately do not quote numbers here, because both change and the only comparison that means anything is the one you run against your own editor headcount and traffic. What we will say from experience is that on most projects the subscription is not the dominant line item; the modeling, frontend build, and migration work is.

Migrating from Contentful to Sanity

This is a well-trodden path and a mechanical one, which is the good news. Content and content types come out of Contentful through its delivery and management APIs, including assets and the full Rich Text node tree. A transform script maps each Contentful content type to a Sanity document schema, converts Rich Text nodes into Portable Text blocks, rewrites entry links as Sanity references, and re-uploads assets so the new dataset has no dependency on the old CDN. The result imports into Sanity as newline-delimited JSON.

The part that actually determines whether a migration succeeds is not the transform — it is the inventory and the parity check. Before anything moves, we document every content type, every entry count, every asset, and every reference relationship. After import, the same inventory is re-run against the Sanity dataset and the two are compared. Anything that does not reconcile is resolved before cutover, not after. URLs, redirects, and metadata get the same treatment, because a CMS migration that loses canonical URLs is an SEO incident regardless of how clean the content came across. That verification discipline is the core of our methodology, and it is how we approach every Sanity development engagement that starts from an existing platform.

SEO and AI Search Implications

At the rendering level the two are equivalent, because SEO lives in the frontend you build: titles, canonicals, structured data, and internal linking are your code either way. Neither platform will rank a page for you, and neither will hold you back. What both give you — and what a page-builder CMS does not — is content stored as typed entities. A service, a location, a person, an FAQ item each exist as structured documents with real relationships, which map directly onto schema.org markup instead of being reverse-engineered out of rendered HTML.

That entity-level clarity is what AI answer engines consume when they decide what a page is about and whether to cite it. A headless architecture makes it possible to emit precise, consistent structured data across hundreds of pages because the underlying content already has the shape the schema requires. It is the direct connection between platform choice and the entity SEO work we specialize in — and it is a reason to favor either of these platforms over a template-driven CMS, not a reason to favor one over the other.

When to Choose Which

Choose Contentful when:

• Multiple teams or brands need one standardized editorial workflow and governance model
• You have little appetite for building and maintaining custom editorial tooling
• An established vendor ecosystem — integrations, partners, prior experience in your hiring pool — carries real weight

Choose Sanity when:

• The editorial experience is worth designing, not just configuring, for the way your team actually works
• You want content models versioned and code-reviewed alongside the frontend that consumes them
• Editors should work inside your own application, with the Studio embedded rather than a separate destination

If the deciding constraint is somewhere else entirely — content that must stay in infrastructure you operate, or an existing SQL database that should remain authoritative — then neither of these is the right frame, and a self-hosted option deserves consideration instead. That is why we model the content first and choose the platform second; the full decision framework lives on our headless CMS development page.

One note on independence: Webvello is not affiliated with, sponsored by, or a certified partner of either Sanity or Contentful. We build on Sanity because it suits the work we do, and we have no commercial reason to talk anyone out of Contentful.

Frequently Asked Questions