Seolyzer Review
Technical SEO data platform combining site crawling, real-time log analysis, and Google Search Console in one interface
Seolyzer is one of the few technical SEO platforms that combines a site crawler, real-time server log analysis, and Google Search Console data into a single cross-analysis view. That trifecta makes crawl budget work genuinely actionable rather than theoretical. The trade-off: no public pricing, a demo-required sales flow, and a tool that rewards SEOs who already understand log analysis rather than those just getting started.
Pros and cons
- Cross-analysis mode fuses crawl data, log files, and GSC into one view, exposing inconsistencies invisible in any single source
- Real-time log streaming lets you see Googlebot activity as it happens, not as a batch report the next day
- API gives you full programmatic access to crawl and link data, verified by ManoMano pulling millions of internal links for data science workflows
- Scheduled and recurring crawls reduce manual work for large sites that need continuous monitoring
- Strong enterprise credibility with clients like Club Med and ManoMano, and an endorsement from Aleyda Solis
- GDPR compliant with European data hosting
- No public pricing page; everything goes through a demo request, which signals enterprise-level cost
- Log analysis has a learning curve that requires understanding of server log formats and Googlebot behavior
- No AI search visibility tracking; focused entirely on traditional crawl and indexing health
- The interface is functional but not polished compared to newer tools built with modern UI frameworks
- No white-label or client-sharing features visible from the public site
What is Seolyzer?
Seolyzer is a French technical SEO platform built around three complementary data sources: site crawling, server log analysis, and Google Search Console. Where most technical SEO tools handle these separately, Seolyzer's cross-analysis mode combines all three into a single view. The practical result is that you can see not just what your site structure looks like and what GSC reports, but what Googlebot actually did when it visited, which pages it crawled, which it skipped, and where it spent time that did not convert into indexing.
The log analysis module streams Googlebot activity in real time. This is meaningfully different from tools that batch-process log files weekly or require you to export and upload manually. For large sites going through a migration, recovering from a crawl budget problem, or trying to understand why certain pages are not getting indexed despite being technically sound, real-time visibility into bot behavior removes a significant delay from the diagnostic process.
The platform is built for teams that already have strong technical SEO foundations. Testimonials from the Head of SEO at Club Med and ManoMano, alongside an endorsement from Aleyda Solis, confirm it is used at scale in enterprise and agency environments. The API, which ManoMano uses to extract millions of internal links for data science work, signals that Seolyzer is designed to plug into larger workflows rather than serve as a standalone reporting layer.
Core features
SEO Crawler
Launch on-demand or recurring crawls to collect technical data across your site. Crawls surface broken links, redirect chains, missing metadata, canonical issues, and page categorization problems. Scheduled crawls mean you do not have to remember to re-crawl after major changes; the data is always current.
Real-Time Log Analysis
Connect your server logs directly and see Googlebot activity stream in real time. Identify which pages Googlebot crawls frequently, which are ignored, and where crawl budget is being wasted on URLs that add no SEO value. Real-time streaming removes the lag that comes from weekly or monthly batch log imports.
Cross-Analysis Data Fusion
Seolyzer's most distinctive capability: merging crawl data, log analysis, and Google Search Console signals into a single view. You can identify pages that are crawled but not indexed, pages GSC shows impressions for but Googlebot rarely visits, and structural problems that only become visible when all three data sources are compared together.
API Access
Pull crawl data, internal link maps, and log analysis results directly into your own tools and dashboards. The API is designed for teams that want Seolyzer data inside their internal analytics stack, not just inside the Seolyzer interface. ManoMano uses it to extract millions of internal links for optimization work by their data science team.
Page Categorization
Define rules to categorize URLs into logical groups, facets, pagination, static pages, and dynamic URLs. Categorization makes it easy to analyze crawl budget and Googlebot behavior by page type rather than looking at every URL individually, which is essential for e-commerce and large content sites with millions of URLs.
Pricing
| Feature | Starter Contact for pricing | Professional Contact for pricing | Enterprise Contact for pricing |
|---|---|---|---|
| SEO Crawler | ✓ | ✓ | ✓ |
| Log analysis | ✓ | ✓ | ✓ |
| Cross-analysis (data fusion) | ✗ | ✓ | ✓ |
| API access | ✗ | ✓ | ✓ |
| Scheduled / recurring crawls | ✗ | ✓ | ✓ |
| Google Search Console integration | ✓ | ✓ | ✓ |
| GDPR-compliant hosting | ✓ | ✓ | ✓ |
Who it is for
Large in-house teams managing sites with millions of URLs need more than a standard crawler. Seolyzer's combination of log analysis and crawl data gives technical SEOs a real view of how Googlebot behaves on the site, not just how the site is structured. The API lets you integrate that data into internal analytics workflows without manual export.
Consultants working on complex migrations, international site restructures, or crawl budget recovery benefit most from the cross-analysis view. Seeing discrepancies between what your crawler finds, what Googlebot actually visits, and what GSC reports is where the real diagnosis happens. Seolyzer makes that comparison without stitching together multiple exports.
Agencies managing e-commerce accounts with faceted navigation, dynamic URL parameters, and deep pagination need to understand crawl budget behavior at scale. Seolyzer's page categorization and log analysis combination lets you show clients exactly where crawl budget is going and build a case for structural changes with Googlebot data as evidence.
Verdict
Seolyzer is a serious technical SEO tool that earns its place at the enterprise level. The cross-analysis capability, combining crawl, logs, and GSC, is genuinely useful and not something most other tools offer in one interface. The main friction points are the opaque pricing model and the learning investment required to use log analysis effectively. Teams that know what they are doing with server logs and crawl data will find Seolyzer powerful. Teams looking for a simple site audit tool should start elsewhere.
Frequently asked questions
What makes Seolyzer different from a standard SEO crawler?
Most crawlers tell you what your site structure looks like from the outside. Seolyzer adds real-time server log analysis so you can see what Googlebot actually did when it visited. The cross-analysis mode then fuses crawl data, log activity, and Google Search Console data to surface discrepancies that would otherwise require three separate tools and a manual comparison.
Does Seolyzer have a free trial or free tier?
Seolyzer does not advertise a free tier or self-serve trial on their public site. The primary CTA is a demo request, which suggests pricing is discussed through a sales conversation. Contact them directly to ask about trial access before committing.
How does the real-time log analysis work?
You connect your server logs directly to Seolyzer, which then streams Googlebot activity as it happens. You can see which URLs Googlebot visits, at what frequency, with what response codes, and how it navigates your internal links, all without waiting for a batch processing cycle.
Is Seolyzer GDPR compliant?
Yes. Seolyzer is a French company and stores data in Europe. GDPR compliance is listed explicitly in their FAQ as a feature, which matters for European enterprises and agencies handling client data under EU privacy regulations.
Can Seolyzer handle very large sites with millions of URLs?
Enterprise clients including Club Med and ManoMano use Seolyzer for large-scale SEO management. ManoMano specifically uses the API to pull millions of internal links for data science processing. The platform is built for scale, though you should confirm crawl and URL limits with their team during the demo.
Does Seolyzer track AI search visibility or AI Overviews?
No. Seolyzer focuses entirely on traditional search crawl health: site crawling, server log analysis, and Google Search Console integration. There is no AI search monitoring, LLM visibility tracking, or AI Overviews coverage. If AI search visibility matters for your work, you need a separate tool for that.