Crawl Lab vs CrawlGenius Log Analyzer

Crawl Lab is a free web toolbox for analyzing server logs and AI crawler activity. It accepts Apache and Nginx common or combined logs, including compressed.gz files, and reports crawled pages, crawl frequency, wasted crawl budget, and bot errors. The analyzer recognizes GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot, Google-Extended, Bytespider, Amazonbot, and other crawlers, checking their authenticity against official IP ranges. Processing occurs in the browser, so log files and IP addresses stay on your machine and are not uploaded or stored. No registration is required. Streaming reads allow analysis of several gigabytes or a full month of logs without a server-imposed size limit. Crawl Lab targets technical SEO practitioners concerned with SEO and generative-engine visibility. Its results show what crawlers fetched, not whether pages were indexed or how they rank. An llms.txt generator and AI citation audit are listed as coming soon. The free plan costs nothing, with no paid tier.

CrawlGenius Log Analyzer analyzes server logs to show how search engines and AI crawlers interact with a website. Its SEO analysis identifies crawl budget waste, HTTP errors, orphan pages, redirect and canonical issues, and fake bots. AI and LLM crawlers are tracked separately from Googlebot, with comparisons between AI and SEO crawling. Dashboards cover crawl coverage, freshness, time to first visit, new URLs, and URLs crawled but never clicked.

Logs can be supplied through a WordPress plugin, server agent, file upload, Amazon S3, or FTP/sFTP deposit; FTP/sFTP is unavailable on the Free plan. Paid plans include a REST API and MCP server. The pricing page says AI crawlers are checked against more than 3,500 official IP ranges and spoofed hits rejected at ingestion. The company says data is hosted in the EU, processed under GDPR, and visitor IPs are truncated before storage; it does not currently hold SOC 2 or ISO 27001 certification. The web-based product is aimed at SEO professionals. The Free plan is free and covers 10,000 log lines monthly, one project, and a seven-day visible window. Starter is €49 a month and Agency is €149 a month, excluding VAT. A guided 30-day trial uses real customer logs and requires no credit card or commitment.