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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elysee.fr

https://elysee.fr· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

elysee.fr

Mobile

Sponsored

Hosting Provider

Cegedim.Cloud SASU

IP Address

185.194.81.29

Server Location

🇫🇷 Boulogne-Billancourt, France

ASN

AS12601

Organization

Cegedim.Cloud SASU

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

nsa.perf1.fr.a.ns.developpement-durable.gouv.fr.nsc.perf1.com.b.ns.developpement-durable.gouv.fr.+1 more

Performance

Page Speed

9.6 MB

31 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cegedim.Cloud SASU

CDN

Cloudflare

Technology Stack

3 Technologies Detected

Meta Frameworks

Astro

CSS Frameworks

Tailwind CSS

CDN

Cloudflare

SEO Analysis

D58/100

elysee.frelysee.fr

Bienvenue sur le site de l'Élysée

Retrouvez toute l'actualité du Président Emmanuel Macron sur le site officiel de la Présidence de la République, et (re)plongez au cœur de l'histoire de la R...

Description truncated.

Title Length33 chars

Recommended: 50-60 chars

Description Length177 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (37/42)

5 issues found

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Crawlability

Sitemap

Type: standard

robots.txt

12 rules

Sitemap reference found

Sponsored

A+

Security Score

98%Excellent

Static / Informational

HTTPS

WAF

13d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Certigna

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

30.11.2025

Valid Until

28.02.2026

Subject Alternative Names (2)

www.elysee.frelysee.fr

SHA-256 Fingerprint

53:13:DA:79:A9:E8:A6:81:90:EB:DB:D9:BB:09:90:77:B9:84:8F:BA...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

159

cache-control

🟡 300s(public, max-age=300, must-revalidate, s-maxage=300, stale-wh...)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9ce198d8baaf5d4a-FRA

content-encoding

📦 Gzip(gzip)

content-security-policy

upgrade-insecure-requests

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mail0.elysee.fr

mail1.elysee.fr

Domain Information

elysee.fr

Domain Age

28y 8m

Created

10.06.1997

Expires

08.01.2027

Last Updated

11.01.2026

Registrar

NAMESHIELD

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Aiglon Pro

81/100

Readability

/30

40/40

20px · LH 1.50

Hierarchy

/20

18/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Aiglon Pro

Sans40px

Body Font

Aiglon Pro

Sans20px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

40px

14px

35px

20px

Augmented Fourth

Scale

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

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

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

13 Resources

Scripts

Styles

Async

Defer

Top Script Sources

elysee.fr(5)isho.elysee.fr(2)local(1)static.cloudflareinsights.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn

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Last analyzed: 15 Feb 2026 at 03:08

Historical Analysis & Change Tracking