CrawlObserver vs Crowl
CrawlObserver
crawlobserver.comCrowl
crowl.techSide by side
| Figure | CrawlObserver | Crowl |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | Yes | — |
| Plans published | 1 | 0 |
| Spec score · SEO Crawler Software | 8.6 (#5) | 7.6 (#25) |
| Spec score · SEO tools | 8.0 (#103) | 7.0 (#227) |
| Free plan | Yes | Yes |
| Integrations | The page lists Google Search Console, Claude Code, and SEObserver under “Integrates with.” | The documentation describes CSV files and MySQL as output options; it does not state integrations with third-party SEO services. |
| Intended users | The page presents use cases for technical SEO audits, monthly tracking, internal linking analysis, broken-link detection, and client reporting. | The maker describes Crowl as designed for SEO professionals and invites contributors to join its volunteer community. |
| Product | CrawlObserver is a lightweight SEO crawler with 45+ signals per page, cross-crawl comparison, and API control. | Crowl is an open-source SEO crawler made by SEOs for SEOs. |
Plans
In their own words
CrawlObserver
CrawlObserver is a free private-beta SEO crawler available through web and API access. It reports more than 45 signals per page and describes audits without a page ceiling, including sites with 500K+ pages. Crawl comparisons identify added or removed URLs and changes to redirects, titles, and canonicals. Technical checks include redirect chains, internal PageRank, SimHash duplicate detection, and broken internal or external links. Internal authority-flow views help surface orphan pages, linking opportunities, and pages receiving too many links. JavaScript rendering can be off, automatic, or always enabled, with automatic detection for React, Vue, Next.js, and Nuxt. A REST API launches crawls and retrieves results. CrawlObserver says it follows robots.txt and crawl-delay, applies per-host delays, and blocks private IP ranges with post-DNS validation. Results are stored in ClickHouse.