Paste a URL and get your landing page reviewed the way YC's Design Review does it: one clear call to action, copy that is clear before it is clever, and how fast a stranger gets to see the product actually work.
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Paste any URL
We load that one page — its text, its markup, a screenshot, and the type sizes and colours the browser actually resolved. No login and no email.
Eight tests, applied to your page
One call to action and nothing competing with it. Clever copy that backfires. How far down before a feat of strength. Whether the page says what you think it says. Demos that confuse. Carousels that bury your best content. Whether the way in is obvious. Whether the craft signals a real company.
Get the verdict and the rewrite
You get the single change worth making first, then the rest in severity order — with the rewritten headline rather than a note asking for a better one.
Most review lenses are an act of translation. You take somebody who wrote about startups, or products, or physics, and you work out what their thinking would imply about a marketing page. The translation is where the errors come from.
This one needs almost no translation. YC publishes a series in which Aaron Epstein loads a real startup’s landing page on screen and says what is wrong with it, and that is precisely what this tool does. The heuristics below are not inferred from a general philosophy; they are the recurring objections in a public record of the exact task.
Almost every page that fails here fails the same way. Somebody wrote a headline they were proud of. It is a metaphor, or a coined category, or a pun that rewards you for knowing what the company does — and every visitor who does not already know is filtered out by the largest text on the page.
The fix is rarely subtle and rarely popular internally, which is why an outside lens is worth something: it has no attachment to the sentence you spent a week on.
Several of these tests are counts rather than judgements. How many things above the fold are styled like the primary button. How many scrolls before you see the product do anything. How many slides in the carousel nobody will reach. Counts are checkable, they do not drift between runs, and they are much harder to argue with in a meeting than “the hero feels cluttered”.
Superflow is not affiliated with Y Combinator, and Aaron Epstein has not reviewed your page or endorsed this tool. What follows is our interpretation of talks and episodes YC published publicly, cited under every result so you can check the interpretation against the original. It does not write as him, and it will not produce a quotation.
No, and the tool will not claim otherwise. This is a review lens assembled from the public record of his approach — YC's Design Review series, which he hosts, plus his Startup School talks. It never writes as him, never states what he would have said about your page, and never invents a quotation. It is our interpretation of published material.
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Superflow agents review the pages you ship on every change, against the standards your team actually holds, and leave the findings as comments on the page itself.