Choosing a headless CMS sounds like a technical decision. It's actually a people decision. The content team needs an editing experience that doesn't make them want to quit. The development team needs an API that doesn't fight them. The business needs pricing that scales predictably. Find a CMS that satisfies all three and you've won. Compromise on any one and you'll be migrating within 18 months.
I've built production sites with all three platforms covered here — Strapi, Contentful, and Sanity — plus a few others I'll mention briefly. This comparison reflects real project experience, not feature matrix scanning.
The Fundamental Choice: Self-Hosted vs SaaS
Before comparing features, understand the hosting model difference. It shapes everything else.
Strapi is self-hosted. You deploy it on your infrastructure — AWS, GCP, DigitalOcean, your own servers. You own the data, control the environment, and handle scaling, security, and upgrades. Freedom and responsibility in equal measure.
Contentful and Sanity are SaaS. They host the CMS, handle scaling, and manage infrastructure. You interact through APIs and dashboards. Less control, less operational burden. Your content lives on their servers under their terms.
This isn't a minor distinction. It determines your total cost (infrastructure vs subscription), your compliance posture (data residency, access control), and your migration path (exporting from SaaS is always harder than moving a database you already control).
Strapi: The Open-Source Contender
Content Modeling
Strapi's content type builder is visual and intuitive. Create content types (think: database schemas for content) through a GUI, define fields (text, rich text, media, relations, components, dynamic zones), and Strapi generates the REST and GraphQL APIs automatically. No code required for basic content modeling.
Dynamic Zones are Strapi's standout feature for content modeling. They let content editors compose pages from predefined component blocks — hero sections, feature grids, testimonials, CTAs — in any order. Think of it as giving editors Lego blocks that developers have pre-built and validated. Flexible enough for marketing teams, structured enough for developers.
Developer Experience
Strapi v5 (the current major version) is built on Koa.js with a TypeScript-first approach. The plugin system is mature, with plugins for SEO, i18n, RBAC, and media management. Customization through controllers, services, middlewares, and lifecycle hooks covers virtually any requirement.
The REST API is auto-generated and follows predictable patterns. GraphQL is available as a plugin. The query engine supports population (like GraphQL's nested queries) and filtering that handles most frontend data requirements without custom endpoints. The API gateway concepts apply if you're managing multiple services.
Deployment requires Node.js hosting and a database (PostgreSQL recommended, MySQL/MariaDB/SQLite supported). Cloud providers like Railway, Render, and Strapi Cloud (their own managed offering) simplify this, but you're still responsible for the deployment pipeline.
Pricing
Strapi Community Edition is free and open-source. The Enterprise Edition ($99/month+) adds SSO, audit logs, review workflows, and premium support. Strapi Cloud (managed hosting) starts at $29/month. Your real cost is the infrastructure to run it — typically $20-100/month for moderate traffic, plus engineering time for maintenance.
Contentful: The Enterprise Standard
Content Modeling
Contentful's content model is powerful but requires more upfront planning. Content types are defined in the web app or via CLI, with fields for text, rich text, media, references, JSON objects, and location. The reference system (linking entries to other entries) is clean and supports one-to-one, one-to-many, and many-to-many relationships.
The rich text field deserves special mention — Contentful's rich text is stored as a structured JSON tree, not HTML. This means you render it however you want on the frontend (React components, Vue templates, static HTML), giving maximum flexibility but requiring a renderer implementation. It's more work upfront but prevents the "content editors pasting formatted Word docs into an HTML field" problem.
Developer Experience
Contentful's Content Delivery API (read) and Content Management API (write) are well-documented, stable, and performant. The CDN-backed delivery API serves content from edge locations globally, with TTFB typically under 50ms. SDKs exist for JavaScript, Python, Ruby, Java, .NET, PHP, and Swift.
The Content Preview API lets frontend teams preview draft content without publishing, which is essential for editorial workflows. Environments (think: Git branches for content) enable safe content changes with rollback capability.
App Framework allows building custom field editors and sidebar widgets. The marketplace has dozens of apps for translations, analytics, SEO, and workflow management. For teams needing custom editorial tools, this extensibility is a genuine advantage.
Pricing
This is where Contentful gets controversial. The free tier (Community) is limited to 5 users and 25,000 records. The Team plan is $300/month for 15 users. Enterprise is custom pricing but typically $1,000-5,000+/month. API call limits on lower tiers can force upgrades. The pricing has pushed many teams toward alternatives, and the "Contentful is expensive" reputation is earned.
Sanity: The Customization Champion
Content Modeling
Sanity models content in code (JavaScript/TypeScript schemas), not through a GUI. This sounds developer-hostile but is actually developer-paradise. Schemas live in your Git repository, are version-controlled, type-checked, and reviewable in pull requests. You define a "blog post" content type as a JavaScript object with typed fields, validation rules, and presentation hints.
Portable Text — Sanity's rich text format — is the most flexible rich text implementation in any CMS. Content is stored as structured blocks that render to any format. Custom block types let you embed React components, data visualizations, or interactive elements directly in rich text. For content-heavy applications, this is transformative.
Developer Experience
Sanity Studio is a React application that you customize and deploy. Every aspect of the editing experience — field editors, validation, previews, structure navigation — is a React component you can replace or extend. Want a custom color picker? Write a React component. Want a side-by-side preview? Configure the structure builder. The customization ceiling is effectively unlimited.
GROQ (Graph-Relational Object Queries) is Sanity's query language. It's more expressive than REST filters and more concise than GraphQL for content queries. Projections let you shape the response in the query itself, reducing over-fetching. Learning GROQ takes a few hours for a developer comfortable with JSON.
Real-time collaboration is native — multiple editors see each other's changes live, like Google Docs. This sounds like a nice-to-have until your editorial team works across time zones and stops overwriting each other's work.
Pricing
Sanity's free tier is generous: 3 non-admin users, 500K API requests/month, 20GB bandwidth. The Growth plan ($15/user/month for up to 20 users) covers most small-to-mid teams. Enterprise is custom. The pay-as-you-grow model is more predictable than Contentful's tier-based pricing.
Comparison Table
| Criteria | Strapi | Contentful | Sanity |
|---|---|---|---|
| Hosting | Self-hosted or Strapi Cloud | SaaS only | SaaS only |
| Content Modeling | GUI (visual builder) | GUI (web app) | Code (JS/TS schemas) |
| API | REST + GraphQL | REST + GraphQL | GROQ + GraphQL |
| Rich Text | HTML (Markdown available) | Structured JSON tree | Portable Text (blocks) |
| Real-time Collaboration | No | Limited | Yes (native) |
| Customization | Plugins + code | App Framework | Full React customization |
| Free Tier | Unlimited (self-hosted) | 5 users, 25K records | 3 users, 500K API calls |
| Starting Paid | $29/mo (Cloud) | $300/mo | $15/user/mo |
| Best For | Full control, budget-conscious | Enterprise, editorial workflows | Custom experiences, dev teams |
When to Choose Each
Choose Strapi when: You want full data ownership, your team can handle deployment and maintenance, you're on a budget, or compliance requires self-hosting. Strapi is also the best choice for projects where you need to extend the CMS with custom business logic — the Node.js backend is yours to modify.
Choose Contentful when: You're an enterprise with a large editorial team, you need robust localization for 10+ languages, your content powers multiple channels (web, mobile, digital signage, IoT), or you need the maturity and stability of a platform that's been in production since 2013. The development environment you pair it with matters too.
Choose Sanity when: You need maximum customization of the editing experience, your content model is complex (nested structures, conditional fields, custom previews), your editorial team works collaboratively in real-time, or you're building a content-heavy application where Portable Text's flexibility matters.
FAQ
Can I migrate between headless CMS platforms?
Yes, but it's painful. Content structure, media assets, and relationships need mapping between different data models. Strapi's database is directly accessible, making export straightforward. Contentful and Sanity provide export APIs. Budget 2-4 weeks for a medium-complexity migration. The frontend code changes are usually minimal — you're changing the data source, not the rendering.
Is a headless CMS worth the additional frontend development?
For multi-channel content (website + mobile app + email), absolutely — the content API serves all channels. For a single WordPress-style blog, probably not — traditional CMS is simpler. The sweet spot is projects with custom frontend requirements where WordPress themes are too limiting.
How does headless CMS performance compare to WordPress?
Headless CMS with a static site generator (Next.js, Astro, Nuxt) typically outperforms WordPress significantly. Pre-built pages serve from CDN (sub-100ms globally) versus WordPress generating pages from PHP/MySQL on each request. The performance gap narrows with caching plugins and managed WordPress hosting but doesn't close entirely.
What frontend framework works best with headless CMS?
Next.js dominates the headless CMS ecosystem in 2026. Astro is excellent for content-heavy sites with minimal interactivity. Nuxt for Vue teams. SvelteKit for Svelte teams. All three CMS platforms have first-party or excellent community integrations with these frameworks.