ContentKing vs Seolyzer in 2026: always-on monitoring vs crawl-log-GSC cross-analysis
Two enterprise technical SEO platforms that both hide their pricing behind a sales call, but solve the diagnostic problem in different ways. One never stops crawling. The other fuses three data sources into a single view.
ContentKing
Seolyzer- ContentKing runs 24/7 continuous monitoring that flags site changes within hours; Seolyzer runs on-demand and scheduled crawls layered with real-time log streaming rather than always-on crawling.
- Seolyzer's signature feature is cross-analysis: fusing crawl data, server logs, and Google Search Console into one view to spot pages Googlebot skips or GSC shows impressions for but rarely visits.
- ContentKing keeps 60 months of snapshot history for root-cause diagnosis and compliance. Seolyzer does not publish a specific history retention window.
- ContentKing tracks AI crawlers like GPTBot and ClaudeBot through its log file analysis, but only on the Enterprise tier. Seolyzer has no AI crawler or AI search visibility tracking at all.
- Seolyzer is GDPR compliant with European data hosting, a detail ContentKing does not publish anywhere in its materials.
- Neither company publishes tier pricing. ContentKing offers a free trial for sites under 100,000 pages; Seolyzer has no advertised trial at all.
- ContentKing's Data API is locked to Enterprise. Seolyzer opens API access one tier earlier, at Professional.
ContentKing and Seolyzer both target technical SEO teams who have outgrown a basic crawler, and both make you talk to sales before you see a price. Past that, the products diverge. ContentKing, now folded into Conductor as Conductor Monitoring, runs continuous 24/7 crawls and keeps 60 months of history so you can trace exactly when something broke. Seolyzer takes a different route: it pairs on-demand and scheduled crawls with real-time server log streaming, then fuses crawl data, logs, and Google Search Console into a single cross-analysis view so you can see what Googlebot actually did, not just what your site looks like from the outside. Neither tool tracks AI citations. ContentKing has moved further into AI-crawler visibility, monitoring whether GPTBot and ClaudeBot can reach your pages, while Seolyzer stays entirely inside traditional Google crawl and indexing health.
The tools at a glance
ContentKing
24/7 website monitoring that catches AEO and SEO technical issues before they cost you traffic
ContentKing was one of the first tools to move technical SEO from weekly crawls to continuous monitoring, and since Conductor acquired it and rebranded it as Conductor Monitoring, that core model hasn't changed. Your site is crawled around the clock, so a broken redirect, a dropped canonical, or a Core Web Vitals regression gets flagged the moment it happens rather than surfacing days later in a scheduled report.
The feature that separates it from a bigger crawl budget is business-impact prioritization: issues aren't just listed, they're ranked by the traffic value of the affected pages, so teams spend their fix time where it actually moves the needle. Add 60 months of snapshot history and you get a tool built for auditing and root-cause tracing on sites where changes happen daily, not diagnosing a one-time crawl.
The catch is access. There is no published price for Essentials, Growth, or Enterprise, and no way to buy without a sales conversation, though the Essentials tier does offer a free trial for sites under 100,000 pages. Log file analysis, including tracking of AI crawlers like GPTBot and ClaudeBot, is locked to Enterprise, so the AEO-relevant part of the product is the part you pay the most to unlock.
| Feature | Essentials Contact for pricing | Growth Contact for pricing | Enterprise Contact for pricing |
|---|---|---|---|
| Pages monitored 24/7 | Up to 100,000 | Up to 500,000 | Custom |
| Core Web Vitals | No | Yes | Yes |
| Log file analysis (AI crawlers) | No | No | Yes |
| Data API | No | No | Yes |
| SSO | No | Yes | Yes |
Seolyzer
Technical SEO data platform combining site crawling, real-time log analysis, and Google Search Console in one interface
Seolyzer is a French technical SEO platform built around three data sources most tools keep separate: site crawling, server log analysis, and Google Search Console. Its cross-analysis mode merges all three, so you can see pages that are crawled but not indexed, or pages GSC shows impressions for but Googlebot rarely visits, without exporting three reports and comparing them by hand.
The log analysis module streams Googlebot activity in real time rather than batching it into a weekly import, which matters most during migrations or when you're trying to work out why technically sound pages aren't getting indexed. Testimonials from Club Med and ManoMano, plus an endorsement from Aleyda Solis, back up that this is used at real enterprise scale; ManoMano's data science team pulls millions of internal links through the API.
Seolyzer assumes you already know what you're looking at. There's a learning curve to log analysis if you haven't worked with server logs before, the interface is functional rather than polished, and like ContentKing, pricing is entirely demo-gated with no free tier or trial advertised. It also has zero AI search visibility tracking, staying focused entirely on traditional Google crawl and indexing health.
| Feature | Starter Contact for pricing | Professional Contact for pricing | Enterprise Contact for pricing |
|---|---|---|---|
| SEO Crawler | Yes | Yes | Yes |
| Log analysis | Yes | Yes | Yes |
| Cross-analysis (data fusion) | No | Yes | Yes |
| API access | No | Yes | Yes |
| Scheduled / recurring crawls | No | Yes | Yes |
Head-to-head feature comparison
| Feature | ContentKing | Seolyzer |
|---|---|---|
| Monitoring model | 24/7 continuous monitoring | On-demand and scheduled crawls with real-time log streaming |
| Server log file analysis | Yes (Enterprise tier only, includes AI crawlers) | Yes (real-time streaming, all tiers) |
| AI crawler tracking (GPTBot / ClaudeBot) | Yes (Enterprise tier only) | No (traditional crawl and indexing health only) |
| Cross-analysis / data fusion (crawl + logs + GSC) | No (links to Conductor Intelligence/Creator, not a unified cross-analysis view) | Yes (crawl, log, and GSC fused into one view) |
| Google Search Console integration | Yes (all tiers) | Yes (all tiers) |
| Snapshot / audit history retention | 60 months | Not publicly stated |
| Scheduled or recurring crawls | Not applicable (always-on monitoring) | Yes (Professional tier and above) |
| API access | Yes (Data API, Enterprise tier only) | Yes (Professional tier and above) |
| GDPR / EU data hosting | Not publicly stated | Yes (French company, European data hosting) |
| White-label reporting | Not publicly stated | No |
| Free trial | Yes (Essentials tier, sites under 100,000 pages) | No public trial advertised |
| Starting price | Contact for pricing | Contact for pricing |
Which should you choose?
ContentKingSeolyzerSeolyzerContentKingSeolyzerContentKingSeolyzerBoth platforms make you sit through a sales conversation before you see a number, so this isn't a pricing decision, it's a workflow decision. ContentKing's value is in never stopping: it catches drift on large, frequently changing sites and keeps enough history to trace a regression back to the day it started. Seolyzer's value is in triangulation: it doesn't just tell you something changed, it tells you what Googlebot did about it by putting crawl data, log data, and GSC data side by side. Pick based on whether your bigger problem is catching change fast or diagnosing why a page underperforms despite looking fine.
Bottom line
Go with ContentKing if you're running a large, high-change-frequency site where a broken redirect sitting undetected for a day is a real revenue risk, and you can clear the enterprise sales process. Go with Seolyzer if your problem is crawl budget waste or indexing gaps that need log-level evidence to diagnose, and you want API access without waiting for the top tier. If AI crawler visibility specifically is the requirement, ContentKing has it and Seolyzer doesn't, but it's gated to Enterprise either way.
Frequently asked questions
How does ContentKing's 24/7 monitoring compare to Seolyzer's crawl and log analysis approach?
ContentKing crawls continuously and flags a change the moment it happens, while Seolyzer runs on-demand or scheduled crawls with a real-time log streaming layer on top rather than crawling around the clock. In practice, ContentKing catches drift faster on sites that change constantly, while Seolyzer is stronger at explaining why a specific page underperforms, since it can show you what Googlebot actually did alongside what your crawler and GSC report.
Does Seolyzer track AI crawlers like GPTBot the way ContentKing does?
Seolyzer does not track AI crawler traffic at all; it is built entirely around traditional Google crawl and indexing signals with no AI search visibility component. ContentKing does track GPTBot and ClaudeBot activity through its log file analysis, but that feature is locked to the Enterprise tier, so you're paying for the top plan either way if AI crawler access is the priority.
Which tool is better for diagnosing crawl budget problems on a large e-commerce site?
Seolyzer is the stronger fit for crawl budget diagnosis specifically, because its cross-analysis view puts crawl data, real-time log activity, and GSC data side by side, which is exactly the comparison you need to see where budget is being wasted on low-value URLs. ContentKing's continuous monitoring is better at telling you something broke than at explaining a crawl efficiency problem.
Can I get pricing for ContentKing or Seolyzer without a sales call?
Neither company publishes tier pricing on its website; both route every prospect through a demo or sales conversation before disclosing a number. ContentKing does offer a free trial for sites under 100,000 pages if you want to evaluate the product first, while Seolyzer has no publicly advertised trial or free tier.
Does either ContentKing or Seolyzer offer white-label reporting for agency clients?
Seolyzer does not list white-label or client-sharing features anywhere in its public materials, and neither does ContentKing, though enterprise sales conversations sometimes surface capabilities that aren't on the marketing site. If white-label delivery is a hard requirement, confirm it directly before signing with either.
Is ContentKing or Seolyzer the better fit for an SEO agency serving multiple clients?
Seolyzer is the more agency-friendly of the two: its own materials call out large e-commerce agency use cases, and its tags include multi-client support. ContentKing explicitly says it isn't designed for freelancers or small agencies on a budget, and its persona list skews toward in-house enterprise teams, so most agencies outside the largest enterprise-serving shops will find Seolyzer the easier fit.