CrawlObserver vs Sitebulb
CrawlObserver
crawlobserver.com
Sitebulb
sitebulb.comSide by side
| Figure | CrawlObserver | Sitebulb |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| API | Yes | — |
| Plans published | 1 | 4 |
| Spec score · SEO Crawler Software | 8.6 (#5) | 8.5 (#8) |
| Spec score · SEO tools | 8.0 (#103) | 9.1 (#12) |
| API access | Yes | No |
| Backlink analysis | Yes | No |
| Free plan | Yes | No |
| Integrations | The page lists Google Search Console, Claude Code, and SEObserver under “Integrates with.” | Officially listed integrations include Google Analytics, Google Search Console, Google Sheets and Data Studio. |
| Keyword research | No | Yes |
| Site audit | Yes | Yes |
Plans
Sitebulb
- Lite$18 a month
- Pro$42 a month
- Sitebulb CloudPrice not published
- Cloud£95 a month
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.