Crawl Lab vs LogWerk
Crawl Lab
crawl-lab.comLogWerk
abbottis.github.ioSide by side
| Figure | Crawl Lab | LogWerk |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Plans published | 1 | 0 |
| Spec score · SEO Log File Analysis Tools | 7.7 (#10) | 7.1 (#22) |
| Audience | The product is aimed at technical SEO practitioners working on SEO and generative-engine visibility. | It is built for developers, sysadmins, and site operators. |
| Log formats | The analyzer supports Apache and Nginx combined or common logs, including compressed .gz files. | It detects Nginx and Apache log formats automatically and also supports manual presets and custom regular expressions. |
| Privacy | Crawl Lab describes the analyzer as RGPD-safe because files are not uploaded or stored. | The maker says logs are parsed in the browser and never uploaded; no account is needed. |
| Purpose | Crawl Lab is a free SEO toolbox for analyzing server logs and AI crawler activity. | LogWerk is an offline-first server log analyzer that runs in a web browser. |
Plans
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.
LogWerk
LogWerk has no write-up on Specifiction yet; its figures are above.