What is OnCrawl?

OnCrawl is an enterprise-grade technical SEO platform that merges website crawling, log file analysis, and Google Search Console data into a unified analytics environment. Unlike standard crawlers, OnCrawl's unique value is correlating what crawlers see with what search engine bots actually do, revealed through log file analysis. This combination surfaces critical technical SEO issues that traditional crawlers alone cannot detect. OnCrawl is used by large e-commerce websites, enterprise SEO teams, and technical SEO agencies. Pricing is based on URL volume with plans starting around $50/month. Pricing may change — verify on the official website.

Getting Started

OnCrawl is a cloud-based platform requiring no local installation. Users start by connecting Google Search Console and setting up their first crawl by entering the target URL and configuring crawl settings such as frequency, depth, and crawl budget. Log file analysis is set up separately by uploading server log files or configuring automated log streaming. The dashboard presents data in visual charts and filterable tables organized by issue type and severity.

Core Features

Advanced Website Crawling

OnCrawl's crawler simulates various search engine bots and can be configured to crawl as Googlebot desktop, Googlebot mobile, or a custom user agent. The crawler captures detailed technical data for each URL including HTTP status codes, page speed metrics, canonical tags, hreflang attributes, structured data, and internal link depth. Crawl reports identify duplicate content, broken links, redirect chains, and crawl depth issues that may be limiting SEO performance.

Log File Analysis

The log file analysis module processes server access logs to show exactly which pages search engine bots are crawling, how frequently they crawl them, and where crawl budget is being wasted. By identifying pages that bots visit frequently despite having no SEO value, webmasters can redirect crawl budget to priority pages. This is OnCrawl's most distinctive feature and is especially powerful for large sites with complex architectures.

Data Integration and Cross-Analysis

OnCrawl integrates crawl data with Google Search Console impressions, clicks, and ranking data to correlate technical issues with actual search performance. Users can identify which technically problematic pages are also underperforming in search, allowing for precise prioritization of fixes based on potential SEO impact.

SEO Monitoring

OnCrawl supports scheduled crawls that automatically run at set intervals, alerting users to new technical issues that appear between crawls. This continuous monitoring ensures technical SEO regressions are caught quickly rather than discovered during manual audits months later.

Best Practices & Optimization

• Start with a log file analysis to understand how Googlebot is already spending crawl budget before making architectural changes
• Use the cross-analysis of crawl data and GSC performance to prioritize which technical issues to fix first
• Schedule weekly crawls on large e-commerce sites to catch new technical issues introduced by product catalog changes
• Filter the crawl report to focus on pages with high organic impressions that have technical issues — these are the highest-priority fixes
• Use the internal linking analysis to improve link equity distribution to important but poorly linked pages

Pros and Cons

• Pro: Unique combination of crawl data and log file analysis not commonly found in other tools
• Pro: GSC data integration enables impact-based prioritization of technical fixes
• Pro: Designed to handle very large sites with millions of pages
• Con: Complex setup, particularly for log file analysis configuration
• Con: Higher price point suitable for enterprise use but challenging for small businesses

What Users Are Saying

OnCrawl is highly regarded in technical SEO circles for its depth of analysis. On Reddit's r/TechSEO, technical SEOs praise its log file analysis capabilities as genuinely unique compared to other crawlers. On G2, enterprise users highlight the cross-analysis capabilities as a major differentiator for large-scale technical SEO programs.

Summary

OnCrawl is a powerful technical SEO platform that goes beyond standard website crawling by combining log file analysis and GSC data integration. For technical SEO professionals managing large, complex websites, OnCrawl's unique data cross-analysis capabilities make it an invaluable tool for understanding and improving how search engines crawl and rank their sites.