CrawlX vs CrawlZilla

CrawlX is a cloud SEO crawler that audits websites, orders issues by estimated impact, and can prepare fixes as GitHub pull requests. It supports spider, sitemap, and URL-list crawls, respects robots.txt by default, and streams crawl progress. Its checks cover more than 150 technical SEO issues. AI tools can draft fixes, score content, tune SERP titles and descriptions, generate schema, and suggest internal links; these features require your own Anthropic, OpenAI, or Google AI key. Proposed fixes are submitted for review: CrawlX says it does not push to the default branch or auto-merge. Integrations include Google Search Console, Google Analytics 4, PageSpeed Insights, GitHub, REST API, MCP, and webhooks; exports are available in CSV, JSON, and PDF. The Free plan is free, with 500 URLs per crawl, five crawls per month, and one project. Starter costs $19 a month and allows 10,000 URLs per crawl. CrawlX runs as cloud SaaS with no desktop application, and does not support distributed multi-worker crawling.

CrawlZilla is a cloud-based SEO crawler for technical site analysis, available on the web and through an API. Its Spider, List and Subdomain modes can crawl HTML, images, JavaScript, CSS and PDFs. Each URL can include more than 40 data points, such as titles, canonicals, hreflang, schema and Open Graph information. An internal-link graph tracks links to help identify orphan pages and show PageRank flow; headless Chrome renders JavaScript pages. Lighthouse audits report Performance, Accessibility, Best Practices and SEO scores, plus Core Web Vitals. Page Monitor checks URLs on a chosen schedule, detects changes across 12 or more SEO fields and can send email alerts. Its REST API uses HTTPS, returns JSON and authenticates with bearer tokens. The free plan allows 10,000 URLs per session, 10 requests per second, three Lighthouse audits per crawl and 20 monitored URLs. Premium is £39.99 a month, with limits of 1,000,000 URLs per session, 20 requests per second, 10 Lighthouse audits per crawl and 500 monitored URLs. The maker says its distributed cloud infrastructure supports crawls of 100 million or more URLs and requires no installation or server management.