The Seolyzer Insider’s Guide
Everything we know about Seolyzer in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
Seolyzer
The Insider’s Guide
French SEO crawler and real-time server log analyzer
Every plan, grade, refund rule and rival among technical SEO tools, read from Seolyzer’s own pages.
Made by Seolyzer SAS · checked Oct 23, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from Seolyzer’s own pages, its app-store listings and our grades. Every fact in it is on Seolyzer’s page too, where it is kept up to date. Checked Oct 23, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.0
GPA, above 10 of the 83 other technical SEO tools we grade
Seolyzer is a French cloud platform that combines an SEO crawler with real-time analysis of server logs and Google Search Console data. It shows which pages Googlebot crawls, ignores or never finds, flags orphan pages and redirects bots do not follow, and exposes all of its data through an API with no call limits. It is sold to businesses after a demo, and its data is hosted in France.
To get you started, here are 7 things to know about Seolyzer, taken from its own pages and our grades.
It's sold to businesses only, and cancelling takes a registered letter a month before renewal.
- 1
Best for live Googlebot activity from server logs
There's no published price, only a demo booking.
- 2
It runs on Web
Web.
- 3
SEO crawler
Crawls sites of several million pages for indexability, status codes, titles and meta tags, depth, response time, sitemaps, orphan pages and internal PageRank.
- 4
Real-time log analysis
Shows live which pages Googlebot crawls most, mobile against desktop bots, server response times, cached pages, bad bots and visits from Google Discover and News.
- 5
Cross analysis
Merges crawl and log data to find orphan, ignored and inactive pages, redirects and errors Googlebot does not follow, and sitemap crawl rates.
- 6
A 2.0 GPA, above 10 of 83
That is against the other technical SEO tools we grade, on value, the free plan, features, ease of use and platforms.
- 7
Keep it
The plain part of Seolyzer you could make: internal linking. What surrounds it you could not. The 5 things listed below take a company, not a weekend.
Seolyzer at a glance
- Pricing
- Paid
- Free plan
- No
- Free trial
- None stated
- Runs on
- Web
- Made by
- Seolyzer SAS
- Category
- Technical SEO & Site Audits
- Our grade
- 2.0 GPA, fair
The report card
Best for live Googlebot activity from server logs
Seolyzer joins a crawler with real-time server log analysis and Search Console data, so you see which pages Googlebot crawls, ignores or never finds, and its API has no call limits. There's no published price, only a demo booking. It's sold to businesses only, and cancelling takes a registered letter a month before renewal.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | C | No price is published. The old pricing page is gone and the site offers only a demo booking, so the cost comes out on a sales call, in euros, before tax. |
| Free plan and trial | F | Nothing free on record: no free plan and no trial, just a demo. |
| Features | B | Crawls sites of several million pages, shows Googlebot's crawl in real time from your logs, merges the two to find orphan and ignored pages, and serves raw crawl, log, Search Console and CrUX data through an API. The listing shows no gap in the core job. |
| Ease of use | C | No rating on record. The log reports stay empty until your server logs are connected, and then there are page categories to build. |
| Platforms and integrations | B | Web only. It connects to Search Console and works with BigQuery and Power BI through an API with no limit on calls or rows. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who Seolyzer is for
- Fits if you run a large French or European site and want Googlebot's activity live
- Works for data teams pulling SEO data into their own dashboards
Who it is not for
- Not for you if you want a price before a demo, as none is published
- Skip it if you're buying for yourself, since its terms cover business customers only
- Watch out: subscriptions renew on their own and must be cancelled by registered letter a month ahead
- Tight if you can't connect your server logs, which the log analysis needs
Good to know
Good for
- SEO teams on large French or European sites that want Googlebot activity in real time
- Watching a site migration or HTTPS switch as bots react to it
- Data teams pulling SEO data into their own dashboards
Worth knowing
- No prices are published: the old pricing page no longer exists and the site offers only a demo booking.
- Its terms of sale cover business customers only and say prices are set in euros, excluding tax.
- Subscriptions renew automatically and must be cancelled by registered letter at least one month before the renewal date.
- Log analysis needs your server log files to be connected to the service.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
Seolyzer's current pricing could not be confirmed from its own site.
The old pricing page is gone and the site offers only a demo booking, so the cost comes out on a sales call, in euros, before tax.
We could not confirm Seolyzer’s current prices from its own site, so this guide lists no plans. seolyzer.io has them.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
French SEO crawler and real-time server log analyzer. Here is what it does, as its own site describes it, and what it covers: public API, site audit, internal linking, log file analysis.
The listing shows no gap in the core job.
- SEO crawler
- Crawls sites of several million pages for indexability, status codes, titles and meta tags, depth, response time, sitemaps, orphan pages and internal PageRank.
- Real-time log analysis
- Shows live which pages Googlebot crawls most, mobile against desktop bots, server response times, cached pages, bad bots and visits from Google Discover and News.
- Cross analysis
- Merges crawl and log data to find orphan, ignored and inactive pages, redirects and errors Googlebot does not follow, and sitemap crawl rates.
- Page categorization
- Group URLs into multi-level categories that apply live and to past data, to see which page types bots favor.
- API
- Raw and aggregated crawl, log, Search Console and CrUX data in JSON, with no limit on calls or rows, and BigQuery and Power BI compatible.
- Unlimited sharing
- Share project data with your team or outside providers without a cap on users and at no extra cost.
Where it runs
- Web
What it works with
- Google Search Console
- BigQuery
- Power BI
Seolyzer is made by Seolyzer SAS.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
10/83
Other technical SEO tools it is graded above
Seolyzer's GPA of 2.0 is higher than 10 of the 83 other technical SEO tools we grade, and level with 9.
It stands best on features (B, above 77 of 83) and worst on free plan and trial (F, above 0).
Each grade against the category
Every bar is all 84 technical SEO tools we grade, cut by the letter each got. Seolyzer’s own letter is outlined.
- CValue for moneyAbove 9 of 83
- FFree plan and trialAbove 0 of 83
- BFeaturesAbove 77 of 83
- CEase of useAbove 7 of 83
- BPlatforms and integrationsAbove 27 of 83
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
The plain part of Seolyzer you could make: internal linking. What surrounds it you could not. The 5 things listed below take a company, not a weekend.
That makes this kind of software worth paying for, not this one in particular: 64 of the 83 other technical SEO tools grade higher.
What you could make
- Internal linking: an app builder makes this well.
What you could not
- A crawler that checks every page of a site.
- Millions of server log lines read to see what search bots crawl.
- It plugs into other products, Google Search Console, BigQuery and Power BI among them, and has an API.
- Sharing with other people, which means accounts and invitations.
- The depth: we grade its features B, which means it covers the whole job.
What this rests on. Seolyzer’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Oncrawl, JetOctopus, Botify, Screaming Frog SEO Spider and Lumar
The 5 tools Seolyzer is most often weighed against, with where each one differs from it.
- 2.0GPA
Oncrawl
Paid
Cloud SEO crawler and log analyzer for large websites.
- Oncrawl also covers dashboards and AI search visibility.
- 2.2GPA
JetOctopus
Free trial · from $349/mo
Cloud SEO crawler with log analysis, GSC data and AI bot tracking.
- JetOctopus also covers AI search visibility.
- 2.2GPA
Botify
Paid
Enterprise search platform for crawling, log analysis and AI search.
- Botify also covers a/B testing and AI search visibility.
- 2.4GPA
Screaming Frog SEO Spider
Free plan · from $279/yr
Desktop website crawler for technical SEO audits.
- Screaming Frog SEO Spider has a free plan. Seolyzer does not.
- Only Seolyzer lists a web app.
- Only Screaming Frog SEO Spider lists Windows, macOS and Linux apps.
- 2.0GPA
Lumar
Paid
Enterprise website crawler for technical SEO, GEO and accessibility.
- Seolyzer also covers internal linking and log file analysis.
- Lumar also covers dashboards, AI search visibility and page speed.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
11
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is Seolyzer free?
No. Seolyzer is a paid product.
What platforms does Seolyzer work on?
Seolyzer is available on Web.
Does Seolyzer have an Android app?
No Android app was listed when its pages were read on Oct 23, 2026. Seolyzer is listed for Web.
Does Seolyzer have an iPhone app?
No iPhone app was listed when its pages were read on Oct 23, 2026. Seolyzer is listed for Web.
Is Seolyzer open source?
Seolyzer is not described as open source on its own site, as read on Oct 23, 2026.
Does Seolyzer have an API?
Yes. Seolyzer offers a public API, according to its own site.
What does Seolyzer integrate with?
Seolyzer's listing names Google Search Console, BigQuery and Power BI.
Who makes Seolyzer?
Seolyzer is made by Seolyzer SAS.
What are the alternatives to Seolyzer?
The closest alternatives to Seolyzer in our directory are Oncrawl, JetOctopus, Botify, Screaming Frog SEO Spider and Lumar.
How does Seolyzer compare with other technical SEO tools?
Seolyzer's GPA of 2.0 is higher than 10 of the 83 other technical SEO tools we grade, and level with 9.
Could I make my own version of Seolyzer?
The plain part of Seolyzer you could make: internal linking. What surrounds it you could not.
Where this guide comes from
The prices, plans, platforms and features were read from Seolyzer’s own pages on Oct 23, 2026, and the grades were given on Oct 23, 2026. Graded from this listing, whose facts were read from Seolyzer's own pages on 23 October 2026. Not based on using the product, and shorter than our full reviews.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Seolyzer SAS. Prices change, so check seolyzer.io before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
3,189
Tools graded, in 94 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
3,189
tools graded
94
categories
426
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Seolyzer, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/seolyzer
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "Seolyzer: The Insider's Guide", checked Oct 23, 2026. https://toolgpa.com/tools/seolyzer
Know someone choosing between technical SEO tools?
Send them this guide: toolgpa.com/tools/seolyzer/guide
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See our other guides
The best-graded technical SEO tools after Seolyzer, each with an Insider's Guide of its own.
- Technical SEO & Site Audits Insider's GuideEvery one of the 84 technical SEO tools we grade, compared
- Lighthouse Insider's GuideGoogle's open-source audit of page speed, accessibility and SEO3.2 GPA
- PageSpeed Insights Insider's GuideFree Google speed test with real-user Core Web Vitals and Lighthouse3.2 GPA
- Yellow Lab Tools Insider's GuideFree open-source audit of a page's speed and front-end code3.2 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what Seolyzer’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Seolyzer is a trademark of its owner, and this guide is not made, paid for or approved by Seolyzer SAS. Prices and plans change: check seolyzer.io before you buy.