Crawl Lab vs EdgeComet 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.

EdgeComet Log Analyzer records search-engine and AI-crawler requests together with the page state each bot received, helping teams examine crawling and indexing. It covers bots such as Googlebot, Bingbot, GPTBot, ClaudeBot, and Perplexity. For each request, it can show the title, meta description, canonical, robots directives, hreflang, and structured data in the HTML served to the bot. Requests are classified as valuable, questionable, or wasted, with causes such as errors, redirects, blocked URLs, non-canonical pages, and render errors. Bot identities are checked against published IP ranges, with 35 real identities supported for verification. Collection requires routing bot requests through EdgeComet via a CDN or proxy; it does not import or parse log files. Supported routing platforms include Cloudflare Workers, Fastly VCL, AWS CloudFront Lambda@Edge, and nginx. The product also offers an HTTP API, an MCP server, and an Apache-2.0 open-source rendering and caching core that can be self-hosted. Professional costs $99 a month. There is no free plan; a 14-day trial is listed.