What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

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chateauversailles.fr

https://chateauversailles.fr· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

Sponsored

Hosting Provider

Eolas Hosted services

IP Address

178.237.110.99

Server Location

🇫🇷 Grenoble, France

ASN

AS15401

Organization

Eolas Hosted services

CDN

Varnish

Nameservers

ns-a.ecritel.fr.ns-a.ecritel.com.ns-b.ecritel.fr.ns-b.ecritel.com.

Performance

Page Speed

2.6 MB

69 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

7 Technologies Detected

Analytics

Google Analytics

Matomo

Advertising

Google Ads Google AdSense

Libraries

jQuery

CSS Frameworks

Tailwind CSS

Icon Libraries

Font Awesome

SEO Analysis

B70/100

chateauversailles.frchateauversailles.fr

Château de Versailles | Site officiel

Résidence officielle des rois de France, le château de Versailles et ses jardins comptent parmi les plus illustres monuments du patrimoine mondial et constit...

Description truncated.

Title Length37 chars

Recommended: 50-60 chars

Description Length225 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (102/111)

3 issues found

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Crawlability

Sitemap

Type: index

2 URLs

robots.txt

53 rules

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Security Score

81%Very Good

Interactive

HTTPS

No WAF

153d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (4096 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

19.06.2025

Valid Until

20.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.chateauversailles.frchateauversailles.fr

SHA-256 Fingerprint

C0:EF:D4:7F:BC:23:1A:18:37:45:B6:DB:E1:FA:F5:A9:68:C1:E2:E1...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

1839

cache-control

🔵 1 Days(max-age=86400, public, private)

content-encoding

📦 Gzip(gzip)

content-language

content-length

26889

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

europe.security-mail.net

france.security-mail.net

Domain Information

chateauversailles.fr

Domain Age

28 years

Created

25.01.1998

Expires

16.07.2026

Last Updated

31.08.2025

Registrar

ECRITEL

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

Apollon + Graphik

48/100

Readability

/30

32/40

16px · LH 1.25

Hierarchy

/20

18/25

4x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Apollon

Sans64px

Body Font

Graphik

Sans16px

Contrast Ratio

Reading Comfort

~42 CPL

Needs attention

64px

24px

30px

18px

16px

Minor Second

Scale

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Strong hierarchy: Headlines are 4.0x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

⚠️ Risky: Text appears on background images without overlay protection.

⚠️ Cramped layout: 92 elements lack adequate spacing.

⚠️ Inconsistent alignment: Mix of left/center/right creates visual noise.

Buy on MyFonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google AnalyticsFree

Microsoft ClarityFree

Matomo (Piwik)Mid-Market

Google Tag ManagerFree

User behavior and product analytics

Advertising

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

13 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(6)chateauversailles.fr(2)googletagmanager.com(1)stats.chateauversailles.fr(1)

Website Identity

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 17 Feb 2026 at 01:33

Historical Analysis & Change Tracking