Sanity vs WordPress Headless vs Webflow: Three-Way CMS Comparison for Next.js

Choosing between Sanity, headless WordPress, and Webflow for a Next.js project is one of the most common scoping questions I get from agency owners and founders. Each platform has a real use case — and each has failure modes that are predictable if you know what to look for. This post lays out the three-way comparison honestly, with concrete numbers where they exist.

Why these three specifically

These are the three options that show up in almost every proposal I write or review. WordPress because a client already has ten years of content in it. Webflow because a designer put together a prototype that looked great. Sanity because a developer on their team heard about it on a podcast. None of those are bad reasons to start a conversation — but they're not reasons to commit, either.

Headless WordPress means keeping WP as a content backend, exposing content via WPGraphQL or the REST API, and building the front-end in Next.js. Webflow's CMS can be queried via its API and used similarly. Sanity is purpose-built as an API-first headless CMS with a hosted Studio and strong TypeScript tooling.

Developer experience compared

Sanity wins here, and it's not especially close. GROQ is expressive and fast, TypeGen generates fully typed query results with one command, and the schema is plain TypeScript objects you version-control alongside your app. When a junior developer on your team touches the schema, TypeScript yells at them before production does.

Headless WordPress is a different story. WPGraphQL is a solid library, but WordPress was not designed to be an API backend. Custom post types, ACF, and Yoast all add friction. Every plugin you add to the WP install is a potential REST or GraphQL surface that breaks unexpectedly, and local dev with a MySQL database is significantly heavier than sanity dev spinning up in five seconds.

Webflow's API is a REST-only JSON API with per-collection rate limits (100 requests per minute on the Lite and CMS plans, 120 on Business). It has no GraphQL option, no SDK worth using in production, and the response shapes change if an editor renames a field in the Webflow designer. That last point has broken production builds for clients without warning.

Editor experience compared

This is where the ranking changes. Webflow's editor is the most polished for non-technical users — visual layout controls, inline editing on the canvas, and designer-friendly UI that marketing teams understand on day one. The trade-off is that editors are editing inside Webflow's layout constraints, which limits what you can do on the Next.js front-end.

WordPress's editor (Gutenberg) is familiar to a huge slice of the web. If your client's content team has been in WordPress for a decade, retraining cost is real and should not be hand-waved away in a proposal. Headless WordPress lets you preserve that familiarity while modernising the front-end.

Sanity Studio is powerful but requires onboarding. The Portable Text editor is excellent once editors understand it, and custom input components let you tailor the Studio to your content model precisely. I've found that editors who use Studio for three weeks stop asking for WordPress back — but the first week requires guidance.

Pricing at real project scale

Webflow's per-item caps are the most painful constraint in practice. A site with a large product catalogue or archive will outgrow the CMS plan quickly, and jumping to Business at $74/mo just to get 10k items is a hard conversation to have after launch.

Sanity's Growth plan at $15/mo covers the majority of mid-size editorial sites. The cost driver on Sanity at scale is bandwidth for asset delivery and API request volume — both predictable and visible in the dashboard.

Headless WordPress infrastructure cost is the most variable. A poorly cached, auto-scaled WP install on WP Engine or Kinsta for a traffic-heavy site can easily run $200+/month. With aggressive page caching and a static front-end, the WP API layer barely moves — so Next.js ISR or full static export can keep costs near the floor.

Next.js integration depth

Sanity has first-class Next.js integration: @sanity/next-sanity, the Presentation plugin with live preview over draft content, GROQ-powered ISR tag revalidation via webhooks, and image URLs with auto=format for WebP/AVIF delivery via next/image. Structured data, sitemap generation, and metadata are all straightforward because query results are typed and predictable.

Headless WordPress works with Next.js but requires more wiring. WPGraphQL with Incremental Static Regeneration is a common pattern, but tag-based revalidation requires custom webhook logic. Image optimisation is less clean: WordPress serves images from its media library, which means either proxying through next/image with an allowed domain config or pulling URLs through Cloudinary/Imgix separately.

Webflow's API is not built for ISR. Polling or time-based revalidation is the typical approach because Webflow doesn't offer webhook-based cache invalidation for content changes at the CMS tier. Building a Webflow-backed Next.js site with real-time-ish content freshness is awkward.

Decision table

Which one I actually recommend

For greenfield Next.js projects with a modern content team: Sanity. The TypeScript integration alone saves hours per week on mid-size engagements, and Growth pricing is reasonable.

For clients with an entrenched WordPress editorial workflow and five years of posts they don't want to migrate: headless WordPress. Budget for proper caching infrastructure. Don't run it on a $10 shared host and wonder why TTFB is 800ms.

For marketing teams that want to control layout without developer involvement — and have a small, bounded content set: Webflow CMS, but not as a headless backend for Next.js. Webflow works best as its own front-end, not as a content API for someone else's renderer. Mixing the two adds complexity without much gain over picking one primary tool.