Sitebulb vs Screaming Frog: Which SEO Crawler Should You Use?

If you’re choosing a technical-SEO crawler, it usually comes down to these two. Screaming Frog and Sitebulb both crawl your whole site and surface hundreds of technical issues, and honestly, either one will do the job well. The differences are about how they do it — price, learning curve, and whether you want dense data or guided reporting. Here’s the honest comparison, and a note at the end on when you don’t need either.

Screaming Frog: the power-user standard

Screaming Frog’s SEO Spider has been a fixture of technical SEO for years. It’s a desktop app (Windows, macOS, Linux) that crawls fast and exposes an enormous amount of granular data: broken links, redirects and redirect chains, duplicate content, metadata problems, and much more. Its strengths are speed, depth, and control — and a genuinely useful free tier that crawls up to 500 URLs, which is enough for many small sites. Beyond that, a licence runs roughly £199 / $259 per year per user and unlocks unlimited crawls, saved configurations, JavaScript rendering, and integrations. The trade-off is the interface: it hands you dense spreadsheets and assumes you know what to do with them. Powerful, but a steeper climb for newcomers.

Sitebulb: guided, visual, prioritised

Sitebulb crawls the same kind of data but wraps it in guidance. Instead of raw tables, it presents prioritised “Hints” — each issue explained in plain language with a severity and a recommended fix — and it draws visual crawl maps that make your site architecture, orphaned clusters, and deep pages easy to see at a glance. It also does accessibility checks and client-ready reports, which is why agencies like it. The catch is pricing: there’s a free trial but no permanent free tier. Plans run about $13.50/month for Lite (capped at 10,000 URLs), roughly $35/month for Pro, and around $245/month for the cloud version. (Both tools change pricing over time — confirm on their sites.)

How to choose

• Pick Screaming Frog if you want the cheapest start (its free 500-URL tier), fast and granular data extraction, and you’re comfortable interpreting dense reports yourself. Best for hands-on SEOs and developers.
• Pick Sitebulb if you want issues prioritised and explained, visual site maps, and polished reports to share with clients or a team — and you’re fine with a subscription and no free tier. Best for agencies and people newer to technical audits.

Honestly, they overlap enough that most individuals end up using one, not both. The best way to decide is to run each on a real site — Screaming Frog’s free tier and Sitebulb’s trial both let you do that before paying.

When you don’t need either

Both tools are full technical-SEO suites, which is more than many people actually need. If the question in front of you is specifically “is my internal linking holding my pages back?” — the orphans, the pages buried too deep, the weak hubs — you don’t need to install a desktop crawler or start a subscription. Crawlmouse crawls your live site in the browser, maps the internal-link graph, and grades the structure for free, with nothing to install. It won’t replace Screaming Frog or Sitebulb for a full technical audit — it does one job — but for the internal-linking question it’s the fastest way to an answer. (See the fuller comparisons for a Screaming Frog alternative and a Sitebulb alternative.)

The practical move: start with the free grade to see whether internal linking is even your problem, and reach for a full crawler like Screaming Frog or Sitebulb when the audit tells you the issue is broader than links.