Gatsby vs Next.js: Which Should You Use for Your Headless CMS?
March 15, 2026
Both are excellent. Both are React-based. And both will absolutely work with a headless CMS. But they're built around different assumptions about how websites should behave, and picking the wrong one for your use case can cost you real time down the road.
This isn't a "Next.js wins, here's why" article. It's a genuine look at where each framework shines, where each one struggles, and how your choice of headless CMS fits into that decision.
A Quick Primer: What They Actually Do
Gatsby is a static site generator at heart. It pulls data from one or more sources at build time — your CMS, your file system, a REST API, a GraphQL endpoint — and compiles everything into a set of static HTML, CSS, and JavaScript files. Those files get deployed to a CDN, and that's your site. No server needed at runtime.
Next.js is a full-stack React framework. It supports static generation (SSG), server-side rendering (SSR), incremental static regeneration (ISR), and plain client-side rendering — sometimes all within the same project, sometimes even on a per-page basis. It runs on a Node.js server, or on edge runtimes like Vercel's.
That single distinction — static-first vs server-capable — drives most of the practical differences between them.
Where Gatsby Still Has an Edge
The data layer is genuinely elegant
Gatsby's GraphQL data layer is one of those things you either love or never quite warm to. At build time, it pulls data from every configured source and makes it queryable through a unified GraphQL schema. You write a query in your page component, and the data just shows up as props.
For content-heavy sites with structured data from a headless CMS, this workflow is hard to beat. Your content types, your images, your relationships between content — all of it gets normalised into a single graph you can query however you want.
If you're using a CMS with a native Gatsby plugin (like Decoupla's gatsby-source-decoupla), the integration is tight. Your content models become queryable types automatically. You don't write fetch calls or deal with API responses directly in your components.
Performance out of the box
Gatsby has always been aggressive about optimisation. Image processing, prefetching, code splitting — a lot of it happens without you thinking about it. For marketing sites, blogs, documentation, and portfolios, the Lighthouse scores tend to be good from the start.
Simpler deployment story for static content
A Gatsby build output is just files. You can host it on S3, Cloudflare Pages, GitHub Pages, Netlify, Vercel — anywhere that can serve static assets. There's no server to manage, no runtime to worry about, no cold starts.
Where Next.js Has an Edge
When you need dynamic behaviour
Not everything can be pre-built. User dashboards, shopping carts, real-time data, personalised content, preview modes for content editors — these scenarios push against the limits of a purely static approach.
Next.js handles all of this naturally. You can have some pages generated at build time and others rendered on the server per request. You can fetch fresh data for specific routes without rebuilding your entire site. The framework doesn't force you to choose a single rendering strategy for everything.
Incremental Static Regeneration
ISR is worth calling out specifically. It lets Next.js rebuild individual pages in the background after a certain time interval, without a full site rebuild. For sites with thousands of pages where content changes occasionally but not constantly, this is a practical middle ground between fully static and fully server-rendered.
Gatsby has something similar (Deferred Static Generation), but ISR in Next.js is more mature and more widely documented.
The ecosystem and community
Next.js is maintained by Vercel and has become the dominant React framework for production applications. The community is larger, the third-party integrations are more plentiful, and when something breaks, the answers are easier to find. That's not a criticism of Gatsby — it's just the current state of things.
Where They're Roughly Equal
TypeScript support
Both have solid TypeScript support. If you're starting a new project in 2025, there's no reason not to use TypeScript with either framework.
Headless CMS compatibility
Any modern headless CMS will work with both. Whether your CMS exposes a REST API or a GraphQL endpoint, Next.js and Gatsby can consume it. The difference is mostly in how you wire things up — Gatsby's plugin ecosystem vs Next.js's more direct approach.
For example, Decoupla offers two integration paths that map neatly onto this split. For Gatsby, there's the gatsby-source-decoupla plugin, which hooks into the build-time data layer automatically. For Next.js and other Node.js/Bun environments, there's the @decoupla/sdk — a lightweight package you can use directly in your getStaticProps, getServerSideProps, or Server Components to fetch content however and whenever your app needs it. Neither approach is better; they just reflect how each framework prefers to work.
React fundamentals
Since both are React frameworks, your component knowledge, hooks, and patterns transfer completely. Switching from one to the other later isn't as painful as switching frameworks entirely.
The Real Decision Framework
Forget the marketing. Here's the honest version:
Choose Gatsby if:
- Your site is primarily content-driven and changes on a predictable schedule
- You want a tight, pre-built integration with your headless CMS via plugins
- Your team is comfortable with GraphQL or willing to learn it
- You're deploying to a CDN and want to keep infrastructure simple
- You're building a blog, documentation site, marketing site, or portfolio
Choose Next.js if:
- Your site has pages that need real-time or user-specific data
- You're building something that's part CMS-driven, part application
- You need the flexibility to mix rendering strategies across different routes
- Your team is already familiar with Next.js or wants the larger ecosystem
- You're not sure yet what your site will need to do in 6 months
The honest answer for most content sites: Gatsby is a genuinely good choice, and it's underrated right now. The narrative has shifted toward Next.js being the default for everything, but for a site that's primarily pulling from a headless CMS and serving static content to readers, Gatsby's build-time data fetching and native CMS integrations are a real advantage — not a limitation.
A Note on Build Times
One legitimate concern with Gatsby for larger sites is build times. When every page is built at deploy time, a site with 10,000 posts will take meaningfully longer to build than a site with 100. Gatsby has improved this with incremental builds, but it's worth factoring in if you're planning for serious content volume.
Next.js with ISR sidesteps this more gracefully for large sites.
Conclusion
There's no universally correct answer here, which is exactly why this question keeps coming up. Both frameworks are production-ready, well-maintained, and capable of delivering fast, well-optimised sites.
If you're building a content-focused site and want a clean integration with your headless CMS from day one, Gatsby remains a strong choice — particularly when your CMS provides a native plugin that handles data sourcing for you. If you need more flexibility around rendering or you're building something closer to a web application than a website, Next.js is the safer long-term bet.
The good news is that your headless CMS shouldn't be the deciding factor here. A well-designed CMS exposes its content through an API, and both frameworks can consume that API. Pick the framework that fits your site's requirements, then wire up your content layer accordingly.
Want to see how Decoupla integrates with Gatsby? Check out the Gatsby integration guide and the gatsby-source-decoupla plugin.