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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musee-orsay.fr

https://musee-orsay.fr· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

musee-orsay.fr

Sponsored

Hosting Provider

Claranet Technology Group

IP Address

212.61.166.130

Server Location

🇳🇱 Eindhoven, Netherlands

ASN

AS8426

Organization

Claranet Technology Group

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

nsc.perf1.com.nsa.perf1.fr.nsb.perf1.com.

Performance

Page Speed

1.3 MB

31 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

5 Technologies Detected

CSS Frameworks

Icon Libraries

Analytics

Tag Managers

CDN

SEO Analysis

D52/100

musee-orsay.frmusee-orsay.fr

Musée d'Orsay

Musée pluridisciplinaire exposant la plus riche collection de tableaux impressionnistes et post impressionnistes au monde dans l'ancienne gare d'Orsay à Paris.

Title Length13 chars

Recommended: 50-60 chars

Description Length159 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

26 URLs

robots.txt

51 rules

Sponsored

A+

Security Score

91%Excellent

Static / Informational

HTTPS

WAF

57d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

15.01.2026

Valid Until

15.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.musee-orsay.fr

SHA-256 Fingerprint

73:42:E3:CE:2B:0A:3F:39:E4:6D:F2:BC:F9:1C:A8:3C:09:F0:2D:FF...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

date

Mon, 16 Feb 2026 17:26:26 GMT

content-type

text/html; charset=UTF-8

content-encoding

📦 Gzip(gzip)

cache-control

🟡 900s(max-age=900, public)

content-language

x-frame-options

SAMEORIGIN

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

solferino.musee-orsay.fr

Domain Information

musee-orsay.fr

Domain Age

29y 4m

Created

08.10.1996

Expires

28.12.2026

Last Updated

31.12.2025

Registrar

NAMESHIELD

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Unna + Montserrat

61/100

Readability

/30

40/40

16px · LH 1.43

Hierarchy

/20

18/25

2.5x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Unna

Sans40px

Body Font

Montserrat

Sans16px

Contrast Ratio

Reading Comfort

Dual Sans-Serif

left aligned

40px

20px

16px

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

✅ Optimal line spacing: 1.43 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

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

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

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

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(9)googletagmanager.com(1)webchat.askmonastudio.com(1)tag.aticdn.net(1)

Website Identity

Facebook Instagram LinkedIn YouTube TikTok Bluesky

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Last analyzed: 16 Feb 2026 at 17:26

Historical Analysis & Change Tracking