CrawlObserver vs Crawlr
CrawlObserver
crawlobserver.com
Crawlr
crawlr.aiSide by side
| Figure | CrawlObserver | Crawlr |
|---|---|---|
| Price from | Free | $8/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 1 | 5 |
| Spec score · SEO Crawler Software | 8.6 (#5) | 9.0 (#1) |
| Spec score · SEO tools | 8.0 (#103) | 8.5 (#34) |
| API | The product offers a REST API to launch crawls, fetch results, and integrate audits into workflows. | The API supports starting crawls, checking status, retrieving structured JSON results, accessing historical data, and webhook events. |
| API access | Yes | Yes |
| Free plan | Yes | Yes |
| Integrations | The page lists Google Search Console, Claude Code, and SEObserver under “Integrates with.” | The pricing page lists Google PageSpeed Insights for the Starter plan and webhook notifications (Beta) for Growth. |
| Intended users | The page presents use cases for technical SEO audits, monthly tracking, internal linking analysis, broken-link detection, and client reporting. | The pricing page describes Starter as suited to single domains and portfolios, Standard to growing teams and agencies, and Growth to high-volume AI and SEO pipelines. |
| Product | CrawlObserver is a lightweight SEO crawler with 45+ signals per page, cross-crawl comparison, and API control. | Crawlr is a website crawler and technical SEO audit tool that identifies technical SEO issues, crawl inefficiencies, and site architecture problems. |
| Security | The crawler describes built-in SSRF protection using post-DNS IP validation to block private IP ranges. | The API uses API key authentication, and the documentation advises keeping keys out of client-side code, public repositories, and logs. |
Plans
Crawlr
- FreeFree
- Starter$8 a month
- Standard$73 a month
- Growth$291 a month
- EnterprisePriced on request
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.
Crawlr
Crawlr is a website crawler and technical SEO audit tool that finds technical issues, crawl inefficiencies and site architecture problems. It discovers URLs through internal links, sitemaps, canonical links and JavaScript. Crawl settings include robots.txt compliance, rate limiting, inclusion and exclusion rules, and depth controls. Its analysis covers response codes, indexability, metadata, headings, word counts, and internal and external links. Results can be explored through interactive graphs, directory trees, 3D site views and content-cluster visualizations. Crawls can run daily, weekly or on custom schedules, with email notifications on completion. The API can start crawls, check their status, return structured JSON, access historical data and send webhook events. The Free plan is free and includes 500 tokens monthly, one concurrent crawl, CSV and JSON exports, and 15-day history. Paid plans start at $8/mo (annual). The Starter plan lists 5,000 tokens monthly, five concurrent crawls and a 5,000-page maximum per crawl. Unauthenticated sandbox crawls are limited to 25 pages.