Docket vs Screaming Frog

Screaming Frog is the better tool if you want raw crawl data and know exactly what to do with it. Docket is the better tool if you want to be told what to fix first. That is the whole difference, and which one is right depends on how much of the interpretation you want to do yourself.

What Screaming Frog does that Docket does not

Three things, and they are real:

• Rendering at scale, in the right engine. Screaming Frog runs headless Chrome across an entire crawl, with configurable wait strategies and JavaScript error capture. Docket renders in WebKit — the engine macOS already ships — and renders a sample, ten pages by default, enough to answer whether the site is client-rendered and what that costs. On a large React or Vue site, or for a bug that only appears in Chrome's renderer, Screaming Frog is the tool.
• Custom extraction. XPath, CSS and regex extraction pulls arbitrary fields out of a crawl — product prices, author names, whatever you define. Docket has no equivalent.
• Scale. Screaming Frog will crawl millions of URLs given the memory. Docket is bounded by design.

What Docket does that Screaming Frog does not

Screaming Frog tells you that 412 pages have a short title. It does not tell you whether that matters more than the noindex it also found, or which to do on Tuesday morning. Reviewers describe its lack of built-in interpretation as simultaneously its greatest strength and its most expensive characteristic — the power is proportional to your own skill and your own time.

Docket ranks every finding by impact against effort and sorts them into four phases: stop the bleeding, quick wins, build, polish. Each finding states what it costs you in plain language and carries the exact markup to paste.

Beyond the ordering, Docket audits three areas Screaming Frog has no coverage of at all:

• AI search visibility. Per-crawler access for ChatGPT, Perplexity, Claude and Gemini, separating search crawlers from training crawlers. Whether pages are server-rendered, since most AI crawlers do not execute JavaScript. Entity resolution via sameAs.
• Marketing conversion. Calls to action, above-the-fold value proposition, form friction, social proof, pricing transparency, message match between title and headline.
• Tracking readiness. Analytics coverage gaps, missing ad pixels, consent, and UTM parameters on internal links.

Side by side

Where the technical depth is genuinely equal

Docket implements the checks Screaming Frog is specifically praised for, including the two that fail silently and that most tools miss:

• hreflang return tags. If page A declares B as its alternate and B does not declare A back, Google discards the whole cluster. Every tag looks correct in isolation, which is why this survives review.
• Conflicting canonicals. An HTML canonical that disagrees with the one in the HTTP Link header. The header usually wins, so the page consolidates to a URL nobody on the team chose — and the page source looks fine.

Docket's robots.txt parser also does full longest-match resolution with * and $ support, which matters more than it sounds: the near-universal Disallow: /wp-admin/ plus Allow: /wp-admin/admin-ajax.php pair is judged wrongly by any parser that resolves rules in order.

Which one to pick

Choose Screaming Frog if you are a technical SEO, your sites are JavaScript-heavy, you need custom extraction, or you are crawling hundreds of thousands of URLs. It is the deeper instrument and its price-to-power ratio is unmatched.

Choose Docket if you need to hand someone a plan rather than a dataset, if you care about AI search visibility or whether your landing pages convert, or if you want a client-ready PDF without building one.

They are not mutually exclusive, and plenty of people will want both.

Common questions

Is Docket a Screaming Frog alternative?

For prioritisation, reporting and non-technical users, yes. For JavaScript custom XPath extraction, rendering at scale and very large crawls, no — Screaming Frog does those better and Docket does not try to.

Does Docket render JavaScript like Screaming Frog?

Yes, through a WebKit helper, though it is off by default and renders a sample — ten pages by default. Screaming Frog renders every page in headless Chrome with configurable wait strategies, which is the better tool for a large single-page application.