Crawling & technical audit
Screaming Frog SEO Spider
The crawler itself is diagnostic, not a checklist: unlimited URLs bounded only by my own memory and disk, Chromium rendering, structured-data and canonical/noindex diagnosis, per-issue priority based on potential impact, crawl comparison surfacing what changed between crawls and staging-vs-production mapping, with bulk error exports literally framed as 'send to a developer'. Search Console and PageSpeed Insights data pulled per URL satisfies the anchor-8 comparison clause, but no log-file analysis or crawl-budget reporting is evidenced, so I can't set the spider's view against what Googlebot actually fetched.
Sitebulb
This is the core of the product and it shows: 300+ prioritised hints with built-in education, headless-Chrome JavaScript rendering, scheduled daily-to-monthly crawls at real scale (500,000 URLs per audit on desktop, up to 10 million on Cloud), and canonical and robots-directive diagnosis detailed enough to become a developer ticket. Search Console integration layers real query data onto audits and audit comparisons track whether fixes landed between snapshots. We found no public information on log-file or crawl-budget analysis, which is the gap that matters for a site our size.