Masthead vs. Ghost vs. Sanity. Which CMS wins AEO?

The CMS logo does not win AEO. The rendering and structure do. If a bot can fetch your URL and get real HTML back, with clean headings and schema and an author it can attribute, you are in the game no matter what platform sits behind it. If the bot gets an empty shell that needs JavaScript to fill in, you lose, and the prettier admin panel does not save you. So the honest ranking of Masthead, Ghost, and Sanity is not a ranking of products. It is a ranking of how easy each one makes it to do the two things that matter: serve server-rendered HTML, and express structure the machines can parse. Masthead wins because we built it for exactly that. Sanity done right is genuinely strong. Ghost is fine for plain publishing and will quietly cap you on structured data.

What an answer engine actually reads

GPTBot, ClaudeBot, PerplexityBot, and Google-Extended are not browsers in the way you hope they are. Some render JavaScript. Many do not, or do it inconsistently, or do it on a schedule you have no control over. The safe assumption is that the bot fetches your page once, reads whatever HTML comes back in that first response, and moves on. That single fact decides almost everything.

So the questions I ask of any CMS are short. Does it return the full article text in the server response, before any client hydration. Are the headings real h1 and h2 elements in a sensible order, not divs styled to look like headings. Is there Article and author schema in the markup. Can I publish an llms.txt and control robots rules. Is the author a named entity a model can attribute a claim to. Everything below is me answering those questions for each of the three.

Ghost

Ghost server-renders by default, and that is the most important thing you can say about it for AEO. Hit a Ghost post with curl and the article is there in the HTML. No hydration gymnastics, no empty root div. For straight publishing that is a real head start, and it is why I never tell anyone Ghost is bad at this. Out of the box it gets the hardest part right.

The ceiling is control. Ghost is opinionated, and its opinions are about being a publication, not about being a structured-data surface you fully own. You get the schema Ghost decides to emit. Pushing custom structured data, shaping author markup the way a specific answer engine likes it, or going headless to render your own frontend means fighting the platform or bolting things on. You can get most of the way there. You cannot easily get all the way there. For a blog that exists to publish posts, that ceiling is high enough. For a company treating its writing as an answer surface it wants to engineer, the box starts to feel like a box.

Sanity

Sanity is the most honest entry on this list because it gives you the most rope. It is a headless CMS. It stores structured content and hands it to you through an API, and then it steps back. The rendering layer is yours. That is the whole story for AEO, and it cuts both ways.

Build the frontend server-rendered, with real SSR, full article HTML in the first response, and schema and author markup you author yourself, and Sanity is excellent. You control everything the bots read because you are the one writing the layer they read. Now build the same content as a client-rendered single-page app that ships an empty shell and fills it in with JavaScript, and you have built something a non-rendering bot sees as blank. Same CMS. Opposite outcome. Sanity does not decide this for you, which means the AEO result is a property of your frontend engineering, not of Sanity. I rate it highly with one condition attached in bold: render it on the server. Skip that and the structured content underneath does not matter, because nothing reaches the crawler.

Masthead

Masthead is ours, so read this knowing I am biased and I am going to try not to be. We built it because we kept doing the same SSR-and-schema work by hand on every Sanity-style build, and we wanted the AEO-correct path to be the default path, not a discipline you had to remember.

So Masthead is SSR-first. The full article ships in the server response. Article and author schema are generated from the content, not hand-maintained per post. llms.txt and robots rules are part of the platform, not an afterthought. The author is a real entity with markup an engine can attribute. None of this is exotic. Every item on that list is something you can do in Sanity with enough effort, and something Ghost does some of and caps the rest of. The argument for Masthead is not that it does impossible things. It is that it does the boring correct things by default, so the failure mode where someone ships a beautiful client-rendered site that no bot can read simply does not happen. We win this comparison because we built for it on purpose. That is the only reason, and it is enough.

The verdict

Pick on rendering and structure, then pick a logo. If you want writing engineered as an answer surface and you want the correct defaults baked in, Masthead, because that is the problem it exists to solve. If you have a frontend team that will commit to real SSR and own the rendering layer, Sanity, and it will be genuinely strong. If you want to publish posts and not think about it, Ghost, with eyes open about the structured-data ceiling. The wrong move is choosing any of them for the admin UI and assuming AEO comes free. It does not come free anywhere. It comes from server-rendered HTML and clean structure, and any of these three can deliver that or fail to, depending on the one decision that actually matters.

A bot that cannot render your JavaScript sees exactly what your server sent it. Design for that bot and you have designed for all of them.