Looking for a better SEO crawler?
Honest, side-by-side comparisons of CrawlX against the tools teams switch from. Every CrawlX plan runs in the cloud with no install, ranks issues by estimated impact, and can ship the fix as a pull request — free for your first 500 URLs.
CrawlX vs the alternatives
Pick the tool you're weighing CrawlX against for a full, no-straw-man breakdown.
CrawlX vs Screaming Frog
Cloud alternative to Screaming Frog: 65+ technical checks, no install, issues ranked by impact, fixes shipped as pull requests. Free for 500 URLs.
Read the Screaming Frog comparison →CrawlX vs Sitebulb
Cloud alternative to Sitebulb: crawl with no install, a free tier, issues ranked by impact, and fixes shipped as pull requests. Free for 500 URLs.
Read the Sitebulb comparison →CrawlX vs Ahrefs
Ahrefs Site Audit alternative: a focused cloud crawler with a free tier, issues ranked by impact, and fixes shipped as pull requests. Free for 500 URLs.
Read the Ahrefs comparison →CrawlX vs Semrush
Semrush Site Audit alternative: a focused cloud crawler from $29/mo with a free tier, impact-ranked issues, and fixes shipped as pull requests.
Read the Semrush comparison →CrawlX vs Netpeak Spider
Cloud alternative to Netpeak Spider: no install, no memory ceiling, issues ranked by impact, and fixes shipped as pull requests. Free for 500 URLs.
Read the Netpeak Spider comparison →Common questions
What is the best Screaming Frog alternative?
It depends on what you need. CrawlX is the closest cloud-native alternative — it runs the same kind of technical crawl in the browser with no install or memory ceiling, ranks issues by estimated impact, and drafts fixes as pull requests. Sitebulb is the pick if you want visual crawl maps; Ahrefs or Semrush make sense if you want a full marketing suite around the audit. CrawlX is free for 500 URLs, so you can compare it on your own site at no cost.
Is there a free SEO crawler?
Yes. CrawlX is free for 500 URLs per crawl with no time limit and no credit card. Screaming Frog is also free up to 500 URLs on the desktop, Semrush's free account audits up to 100 pages per month, and Ahrefs Webmaster Tools audits your own verified sites for free. CrawlX adds impact-ranked issues and fixes shipped as pull requests on its free tier.
Which SEO crawler runs in the cloud with nothing to install?
CrawlX is fully cloud-native — you crawl from the browser with nothing to install or update, and large crawls aren't limited by your computer's memory. Screaming Frog and Sitebulb are desktop-first (Sitebulb has newer cloud plans), while Ahrefs and Semrush run in the cloud as part of broader marketing suites.
Can a Screaming Frog alternative crawl JavaScript sites?
Yes — CrawlX renders pages with headless Chromium and crawls the rendered DOM, so single-page apps and client-rendered content are covered, the same as Screaming Frog's rendering mode and the other tools here.
Compare CrawlX on your own site
Your first cloud crawl runs free — 500 URLs, no credit card, no install.