Crawl Lab vs Screaming Frog SEO Log File Analyser
Crawl Lab
crawl-lab.com
Screaming Frog SEO Log File Analyser
screamingfrog.co.ukSide by side
| Figure | Crawl Lab | Screaming Frog SEO Log File Analyser |
|---|---|---|
| Price from | Free | $11.58/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| Plans published | 1 | 5 |
| Spec score · SEO Log File Analysis Tools | 7.7 (#10) | 8.7 (#1) |
| Audience | The product is aimed at technical SEO practitioners working on SEO and generative-engine visibility. | The maker describes the software as specifically designed for SEOs analysing search and AI bot activity. |
| Bot verification | The analyzer verifies crawler authenticity using official IP ranges. | The software verifies genuine search and AI bots and can expose spoofed bot IP activity. |
| Headquarters | Quebec, Canada | Henley-on-Thames, Oxfordshire, UK |
| Local processing | All processing runs in the browser and log files and IP addresses never leave the user's machine. | The application stores imported events in a local database and runs on the user's computer. |
| Purpose | Crawl Lab is a free SEO toolbox for analyzing server logs and AI crawler activity. | The desktop application analyses access logs to give SEOs insight into search engine and AI bot crawl activity. |
| Scale | The tool reads files in streaming mode and can analyze several gigabytes or a full month of logs without a server-imposed size limit. | The local database is designed to handle millions of log events, with practical limits determined by storage and hardware. |
Plans
Screaming Frog SEO Log File Analyser
- FreeFree
- Paid$139 a year
- Free VersionFree
- Paid licence$139 a year
- Paid Version$139 a year
In their own words
Crawl Lab
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.
Screaming Frog SEO Log File Analyser
Screaming Frog SEO Log File Analyser is a desktop application for examining access logs and understanding search engine and AI bot activity. It installs locally and keeps log event data in a local database. It accepts Apache, W3C Extended, and Amazon Elastic Load Balancing logs, and can verify supported bots to identify spoofed requests. Reports cover crawled URLs, crawl frequency, response errors, redirects, bytes downloaded, and response times. Users can match imported data containing a URLs column against log activity, including crawls, directives, or external link data. Log files can be added by drag and drop, with analysis exported to CSV or Excel. The software can process millions of events, though capacity depends on hard drive space. It runs on Linux, macOS, and Windows. The free plan allows 1,000 log event lines and one project. The paid licence costs $139 per year and includes unlimited events and projects, subject to storage capacity. Free technical support is listed for both versions.