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.

Back to Search

lexpress.fr

https://lexpress.fr· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

lexpress.fr

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

15.197.169.223

Server Location

🇨🇦 Montreal, Canada

ASN

AS16509

Organization

AWS Global Accelerator (GLOBAL)

Server

OpenResty

Nameservers

ns2.observatoiredesmarques.fr.ns3.nameshield.net.obs.ns1.fr.

Performance

Page Speed

1.8 MB

181 requests

Image Optimization

Lazy LoadResponsiveThumbor

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

Frontend

Framework

React

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Amazon Web Services (AWS)

Progressive Web App

PWA ReadyWeb ManifestService WorkerApple Touch IconTheme Color

Detected API Sources

https://cdn-eu.piano.io/api/ti...

Technology Stack

15 Technologies Detected

Analytics

Google Analytics

Facebook Pixel Amplitude FullStory

Advertising

Twitter Ads LinkedIn Ads Microsoft Advertising Taboola

CSS Frameworks

Frameworks

Meta Frameworks

Fonts

Tag Managers

Web Servers

SEO Analysis

A+94/100

lexpress.frlexpress.fr

L'Express - Actualités Politique, Monde, Economie et Culture - L'Ex...

Information à la Une : l'actualité et l'information en direct sur LExpress.fr. Infos politiques, internationales, économiques, sportives et culturelles.

Title truncated.

Title Length72 chars

Recommended: 50-60 chars

Description Length152 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

100 URLs

robots.txt

67 rules

Sitemap reference found

Sponsored

Security Score

41%Poor

Interactive

HTTPS

No WAF

51d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

05.01.2026

Valid Until

05.04.2026

Subject Alternative Names (10)

lentreprise.lexpress.frlexpansion.lexpress.frlexpress.web.arc-cdn.netpl.lexpress.eupl.preprod.lexpress.eupreprod.lexpress.eupreprodarc.lexpress.frvotreargent.lexpress.fr+2 more

SHA-256 Fingerprint

04:C2:7D:39:BA:28:7D:3B:F0:EB:F6:31:91:8F:40:F7:C7:8B:D2:75...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 60s(private, max-age=60)

content-encoding

📦 Gzip(gzip)

content-length

221296

content-security-policy

upgrade-insecure-requests

content-type

text/html; charset=utf-8

date

Fri, 13 Feb 2026 04:17:30 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

lexpress-fr.mail.protection.outlook.com

Domain Information

lexpress.fr

Domain Age

27y 6m

Created

12.08.1998

Expires

20.01.2027

Last Updated

23.01.2026

Registrar

NAMESHIELD

DNSSEC

Not Enabled

Privacy & Compliance

Didomi

Cookie Consent Banner

Didomi

GDPR Indicators

Cookie consent banner detected

CMP: Didomi

Data Protection Officer mentioned

Typography & Readability

Spartan

56/100

Readability

/30

20/40

10px · LH 1.60

Hierarchy

/20

13/25

1.6x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Spartan

Sans16px

Body Font

Spartan

Sans10px

Contrast Ratio

Reading Comfort

~46 CPL

Optimal (45–75)

16px

24px

18px

10px

Major Second

Scale

❌ Critical: 10px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Good hierarchy: Clear distinction between headlines and 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.

GGoogle Fonts Buy on MyFontsVariable Fonts

Business & Marketing Stack

9 Tools Detected

Enterprise

Behavior Analytics

AmplitudeMid-Market

Google Tag ManagerFree

Matomo (Piwik)Mid-Market

PlausibleSMB

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

LinkedIn AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Reviews & Social Proof

TrustpilotMid-Market

Customer reviews and testimonials

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

api.realytics.io(4)googletagmanager.com(2)cdn.cxense.com(2)tp.realytics.io(1)api-v6.realytics.net(1)

Website Identity

lexpress.fr

27 years old

NAMESHIELD📧 Microsoft 365

Social Profiles

Facebook X (Twitter)Instagram LinkedIn YouTube TikTok

Sponsored

Last analyzed: 13 Feb 2026 at 04:17

Historical Analysis & Change Tracking