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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gouvernement.fr

https://gouvernement.fr· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

gouvernement.fr

Sponsored

Hosting Provider

Gandi

gandi.net

IP Address

217.70.184.55

Server Location

🇫🇷 Paris, France

ASN

AS29169

Organization

Gandi France L/B Services

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-7-b.gandi.net.ns-122-c.gandi.net.ns-176-a.gandi.net.

Performance

Page Speed

17.8 MB

122 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Gandi

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

6 Technologies Detected

Meta Frameworks

Other

CSS Frameworks

Email Marketing

Advertising

CDN

SEO Analysis

A88/100

gouvernement.frgouvernement.fr

Site officiel du Gouvernement | info.gouv.fr

Retrouvez toute l'actualité sur l'action du Gouvernement, les résultats des politiques publiques, et les services essentiels à tous les citoyens.

Title Length44 chars

Recommended: 50-60 chars

Description Length145 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (47/48)

1 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

49 rules

Sitemap reference found

Sponsored

Security Score

86%Very Good

Interactive

HTTPS

WAF

79d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DHIMYOTIS

Key Algorithm

RSA (3072 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

05.02.2026

Valid Until

06.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

www.info.gouv.frbarometre.info.gouv.frinfo.gouv.frrecherche.info.gouv.fr

SHA-256 Fingerprint

6B:62:6A:25:B7:A0:78:EE:6C:B6:1F:6C:3C:66:27:A8:26:54:6E:6B...

Upgrade to view header details

HTTP Headers

Developer Console

date

Mon, 16 Feb 2026 05:43:03 GMT

content-type

text/html; charset=UTF-8

content-encoding

📦 Gzip(gzip)

cache-control

🔵 1 Days(max-age=86400, public)

cache-tags

homepage, website

content-security-policy

default-src 'self'; base-uri 'self'; block-all-mixed-content...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

smtpav2.hosteam.fr

smtpav.hosteam.fr

Domain Information

gouvernement.fr

Domain Age

22y 4m

Created

28.09.2003

Expires

21.06.2026

Last Updated

26.05.2025

Registrar

GANDI

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

arial

78/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

15/25

1.25x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

arial

Sans20px

Body Font

arial

Sans16px

Contrast Ratio

Reading Comfort

~49 CPL

Optimal (45–75)

20px

12px

28px

16px

Perfect Fifth

Scale

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ 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

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(19)zhsv.info.gouv.fr(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn GitHub TikTok Threads

Sponsored

Last analyzed: 16 Feb 2026 at 05:43

Historical Analysis & Change Tracking