Crawl Analysis Tools: Screaming Frog, Sitebulb, and Alternatives
Updated 10 min read
Crawl analysis tools simulate search engine crawlers to export URLs, status codes, metadata, and link graphs—surfacing architecture issues before they show up as indexation failures in Search Console. For reference, see Screaming Frog SEO Spider.
What crawlers catch that analytics miss
Analytics tells you what users hit; crawlers tell you what bots can reach. I run crawls after every major release to catch orphan pages, redirect loops, and canonicals pointing to 404s. For reference, see Screaming Frog SEO Spider.
Faceted navigation and parameter URLs often explode crawl depth before they explode traffic. Crawlers quantify how many low-value URLs exist and which templates link to them.
I export inlinks to money pages to prove internal linking gaps—not just ‘we need more blog posts.’. Related reading: technical SEO tools overview.
Screaming Frog vs Sitebulb in practice
Screaming Frog is my default for deep exports, custom extraction, and API integrations. Sitebulb shines when I need visual site architecture and faster stakeholder reports.
Both support JavaScript rendering modes; I enable JS only on URL samples because full-site JS crawls are slow and expensive.
For enterprise scale I look at Lumar (Deepcrawl) or OnCrawl when crawl scheduling and trend lines matter more than one-off audits. Related reading: log-file analysis tools.
Crawl settings I standardize
Respect robots.txt unless we are explicitly auditing staging. Include noindex URLs in a separate export—they often leak into sitemaps. For reference, see Ahrefs guide to website crawlers.
Store response codes, canonicals, hreflang, and word count. I segment by folder (/blog/, /product/, /tag/) before sharing with content teams.
Compare two crawls diff-style after migrations: new 404s, lost redirects, and title changes on templates. Related reading: crawl budget optimization.
Handing crawl data to engineering
I deliver CSV tabs: 5xx/4xx, redirect chains over two hops, duplicate titles on indexable URLs, and parameters with no canonical.
Each row gets a suggested fix type (redirect, noindex, canonical, template). That reduces back-and-forth in Jira.
Pair crawl exports with GSC coverage so we fix URLs Google already tried to index. Related reading: Core Web Vitals Tools: PSI, CrUX, Lighthouse, and RUM.
Actionable takeaways
- Crawl after every routing or robots change
- Segment exports by template and folder
- Use JS rendering selectively, not site-wide by default
- Diff crawls before and after migrations
Frequently asked questions
- How many URLs can Screaming Frog crawl for free?
- The free license crawls up to 500 URLs per project—enough for small sites. Larger audits need a paid license or an enterprise crawler.
Explore client results with GSC metrics or SEO & local services.
