Webflow bundles design, content, hosting and publishing into one platform. Astro and Sanity split those jobs between a front-end framework and a headless CMS, which gives you more control and hands you more responsibility. Neither is better in the abstract. The right choice depends on who builds the site, who edits it and how much engineering time you are prepared to commit for as long as the site exists.
Key Takeaways
- Webflow is an integrated platform; Astro with Sanity is a composed stack you assemble, host and maintain yourself.
- Astro with Sanity offers a higher ceiling on performance, content modelling and custom functionality.
- Webflow offers faster visual iteration and far less dependence on developers for routine marketing work.
- Neither option is free of lock-in: Sanity's content store is hosted by Sanity, and its query language is its own.
- The deciding factor is usually team shape, specifically whether engineers will own the marketing site long term.
This comparison comes up most often in a specific situation. A SaaS company has a capable engineering team, a marketing site on Webflow, and a developer who has started asking why the site is not built with the same modern tooling as everything else. Astro and Sanity is the stack that tends to get named, and for good reason: both are well regarded, both are mature, and together they solve real problems.
We build in Webflow, so read this with that in mind. We have also seen enough composed stacks, good and bad, to know the question does not have a single answer. What follows is an attempt to set out the trade-offs honestly enough that you could make the decision without us.
What you are actually comparing
It helps to be precise, because this is not a like-for-like comparison of two website builders.
Webflow is an integrated platform. The visual designer, the CMS, hosting, the CDN, SSL, forms and the publishing workflow all come from one vendor on one bill. A designer builds the site visually, marketing edits content in the same environment, and the platform handles everything underneath. We have written before about where that model fits.
Astro is an open-source web framework designed for content-driven websites. Its central idea is that a page should ship as little JavaScript as possible, so by default it renders HTML and CSS and only adds interactivity to the components that need it. Cloudflare acquired the company behind Astro in January 2026, and the framework has remained open source under the MIT licence and deployable on other hosts.
Sanity is a headless CMS. Content lives in Sanity's hosted content store, editors work in Sanity Studio, which is a customisable React application, and the front end pulls content through an API using GROQ, Sanity's own query language, or GraphQL.
Put Astro and Sanity together and you have a composed stack: a framework, a CMS and a host chosen separately and connected by your team. That composition is both the appeal and the cost.
Where Astro and Sanity are genuinely stronger
It is worth stating the case for the composed stack properly, because it is a strong one.
Performance ceiling. Astro's default of shipping minimal JavaScript makes it straightforward to build very fast pages. Webflow sites can be fast too, but Astro gives a developer finer control over exactly what reaches the browser, and that matters for teams chasing every point on Google's Core Web Vitals.
Content modelling. Sanity handles structured, relational content far more comfortably than Webflow's CMS. Deeply nested references, content reused across several channels, and schemas defined in code with proper validation are all natural in Sanity and awkward in Webflow. If your content model looks more like a database than a set of page templates, this difference is decisive.
Editorial customisation. Sanity Studio can be shaped around how a specific team works, down to individual input fields and custom previews. Real-time collaboration means two editors can work in the same document at once. For a large editorial operation, that flexibility is hard to match.
Scale and flexibility. There are no platform ceilings on page counts or collection items, and anything with an API can be integrated without waiting for a platform to support it. Astro also works with whatever UI framework your engineers already know, which makes it easier for a product team to contribute to the marketing site.
Developer alignment. Code lives in a repository with version control, review and automated deployment, which fits naturally into how an engineering team already works.
Where Webflow is genuinely stronger
The case for the integrated platform is different in kind, and it is mostly about people rather than technology.
Marketing autonomy. On a well-built Webflow site, a marketer can publish a landing page, adjust a layout or add a customer story without involving a developer. On an Astro and Sanity site, marketing can edit content that fits existing schemas, but a genuinely new page layout or section usually needs a developer to build the component first. That difference compounds over a year of campaigns, and it is the practical core of the no-code argument.
Visual iteration speed. Designers work directly in the production environment. There is no handoff from a design file to a developer who then interprets it, which removes a slow and lossy step from every change. That is much of the reason our web design work stays close to the build rather than ending at a static file.
Fewer moving parts. One vendor handles hosting, security, SSL and uptime. A composed stack means a framework to keep updated, a CMS to configure, a host to manage, build pipelines to maintain and a set of dependencies that all move at their own pace.
Time to launch. For a typical marketing site, a skilled Webflow team usually gets to launch faster, because the infrastructure decisions are already made. Good Webflow development spends its time on the site rather than on the plumbing.
Webflow's limits are real, and we have covered them in detail elsewhere. The Premium plan's CMS allows 20,000 items and 40 collections, a single collection list shows 100 items before pagination, and relational content modelling is where the platform is weakest. Webflow's dynamic content limits set out the detail.
The lock-in question, on both sides
Lock-in is often presented as a reason to leave Webflow, so it deserves a balanced look.
Webflow's portability is partial. You can export static code on a paid workspace plan, but dynamic content comes out collection by collection, forms stop working and nothing can be imported back. Leaving means rebuilding the front end.
Astro itself is about as portable as it gets: open source, MIT-licensed and deployable on most modern hosts. Sanity is a different story. According to Sanity's own documentation, the Studio can be self-hosted but the content store itself has to be hosted by Sanity, and GROQ is a proprietary query language. Moving off Sanity later means migrating your content and rewriting the queries that fetch it.
So the composed stack moves lock-in rather than removing it. You trade dependence on one platform for dependence on a CMS vendor, and in exchange you gain a front end you fully own. For many teams that is a good trade. It is just not the escape from vendors it is sometimes described as.
What each option really costs
Sticker prices are the least useful part of this comparison, but they are worth getting right before moving on.
Webflow charges for site plans, workspace seats and add-ons such as localisation, and the Webflow pricing page lists the current configuration. Sanity has a free tier and a Growth plan priced per seat, with usage-based charges above included quotas and an enterprise tier for features such as single sign-on. Astro costs nothing, and hosting for an Astro site can be cheap or free at modest traffic levels.
On those numbers alone, the composed stack often looks cheaper. The real cost sits elsewhere. Every new page layout, every structural change and every dependency update needs developer time, and developer time is the most expensive resource most SaaS companies have. A composed stack is cheaper when engineers are going to maintain it anyway. It is considerably more expensive when they are not, because marketing ends up queueing for changes it could otherwise have made itself.
The honest way to compare is total cost of ownership over two or three years, including the hours, rather than monthly licence fees.
SEO and performance in practice
Both options can produce excellent search performance. Neither produces it automatically.
Astro gives more direct control over markup, rendering and JavaScript, which is valuable when performance is a competitive concern. Webflow provides the essential controls, including metadata, canonical tags, sitemaps, redirects and schema support, and handles hosting and the CDN competently. In both cases the outcome depends on the same disciplines: information architecture, internal linking, content quality and image weight, which remains the most common real-world problem regardless of stack. We have covered the practical side of image compression separately, and the strategic side belongs with proper SEO work.
If you do move between the two, search equity is where migrations go wrong. The URL inventory, redirect map and metadata parity matter far more than the choice of framework, and they are the same disciplines behind any platform migration.
How to decide
A few questions usually settle it.
Who will own the site in two years? If engineering will genuinely own and maintain the marketing site, the composed stack fits naturally. If marketing will own it, Webflow usually wins, because the people making most of the changes can make them directly.
How complex is the content model? Structured but mostly page-shaped content suits Webflow. Deeply relational content, multi-channel reuse or very large content volumes point towards Sanity.
How often does the layout change, rather than the content? Frequent new sections, campaign pages and experiments favour a visual platform. A stable design with changing content favours a headless setup.
Is performance a genuine competitive factor? For most B2B SaaS marketing sites, a well-built Webflow site is fast enough. For some, the extra control Astro offers is worth paying for.
There is also a hybrid pattern worth knowing about: a Webflow marketing site alongside a separate Astro build for documentation or a large resource library. That keeps marketing autonomous where it matters most while giving engineering control where the content model demands it.
Frequently asked questions
1. Is Astro with Sanity faster than Webflow?
It can be, because Astro ships minimal JavaScript by default and gives developers precise control over what reaches the browser. In practice, a well-built Webflow site is fast enough for most marketing purposes, and a poorly built Astro site can still be slow. Build quality and image handling matter more than the choice of stack.
2. Can marketing teams edit an Astro and Sanity site without developers?
For content, yes. Sanity Studio is a capable editing environment and can be customised around a team's workflow. For new page layouts, sections or structural changes, usually not, since those need a developer to build the components first. That is the most important practical difference from Webflow.
3. Is Astro with Sanity cheaper than Webflow?
The licence costs are often lower, but total cost of ownership frequently is not. Developer time for new layouts, maintenance and dependency updates tends to outweigh the subscription savings unless engineers were going to maintain the site anyway.
4. Does moving to Astro and Sanity remove vendor lock-in?
It reduces it on the front end, since Astro is open source and portable. It does not remove it entirely, because Sanity hosts the content store and uses its own query language. Moving off Sanity later means migrating content and rewriting queries.
5. Should we migrate from Webflow to Astro and Sanity?
Only for a structural reason: engineering ownership, a content model Webflow cannot handle, or scale beyond its limits. If the main motivation is cost, developer preference or a vague sense that code is more serious, the migration is likely to create more work than it saves.
Final word
Webflow and Astro with Sanity are both good answers to different questions. The integrated platform answers the question of how a marketing team can move quickly without depending on engineers. The composed stack answers the question of how an engineering team can build exactly what it wants with no ceiling. Most of the frustration we see comes from companies choosing the tool that fits one team and then asking the other team to live with it. Decide who owns the site first, and the stack usually becomes obvious. If you would like a second opinion on your own situation, including where Webflow is the wrong answer, get in touch. You can see how we approach ownership and scale in our work with teams like HockeyStack, a previous client.
Platform details reflect official Webflow, Astro and Sanity documentation as of September 2026. All three change regularly, so check current capabilities and pricing before deciding.
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