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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quechoisir.org

https://quechoisir.org· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

quechoisir.org

Sponsored

Hosting Provider

UFC QUE Choisir Neot

IP Address

158.255.107.78

Server Location

🇫🇷 Paris, France

ASN

AS8218

Organization

UFC QUE Choisir Neot

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns2.quechoisir.org.ns1.quechoisir.org.

Performance

Page Speed

4 KB

42 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

UFC QUE Choisir Neot

CDN

Cloudflare

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Analytics

Google Analytics

CDN

Cloudflare

SEO Analysis

A88/100

quechoisir.orgquechoisir.org

Association de consommateurs - UFC-Que Choisir

L’UFC-Que Choisir est au service des consommateurs pour les informer, les conseiller et les défendre. Des milliers de produits testés en toute indépendance !

Title Length46 chars

Recommended: 50-60 chars

Description Length157 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

49 rules

Sponsored

A+

Security Score

91%Excellent

Interactive

HTTPS

WAF

174d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Gandi SAS

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

10.07.2025

Valid Until

10.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.quechoisir.orgquechoisir.org

SHA-256 Fingerprint

9E:B2:C6:0A:5B:FC:1A:3E:4C:99:B6:A1:9E:37:93:B3:38:10:BF:EE...

Upgrade to view header details

HTTP Headers

Developer Console

date

Tue, 17 Feb 2026 15:14:52 GMT

content-type

text/html; charset=UTF-8

content-encoding

📦 Gzip(gzip)

referrer-policy

strict-origin-when-cross-origin

x-frame-options

SAMEORIGIN

x-content-type-options

nosniff

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

d45.altospam.net

u24.altospam.com

Domain Information

quechoisir.org

Domain Age

28y 8m

Created

12.06.1997

Expires

11.06.2027

Last Updated

14.05.2025

Registrar

Gandi SAS

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Arial

69/100

Readability

/30

40/40

18px · LH 1.40

Hierarchy

/20

8/25

0.89x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Arial

Sans16px

Body Font

Arial

Sans18px

Contrast Ratio

Reading Comfort

~40 CPL

Needs attention

16px

32px

18px

Octave

Scale

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.40 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

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

stds.qccdn.fr(5)cdn.tagcommander.com(2)challenges.cloudflare.com(1)tag.aticdn.net(1)cdn.trustcommander.net(1)

Website Identity

Facebook Instagram LinkedIn YouTube TikTok

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Last analyzed: 17 Feb 2026 at 15:15

Historical Analysis & Change Tracking