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

eui.eu

https://eui.eu· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

eui.eu

Sponsored

Hosting Provider

Istituto Universitario Europeo

IP Address

192.167.90.37

Server Location

🇮🇹 Florence, Italy

ASN

AS137

Organization

Istituto Universitario Europeo

Nameservers

dns1.iue.it.ns1.garr.net.dns2.iue.it.

Performance

Page Speed

1.9 MB

32 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Tailwind CSS

Infrastructure

Hosting

Istituto Universitario Europeo

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

10 Technologies Detected

UI Components

Owl Carousel Lightbox

CSS Frameworks

Libraries

Other

Icon Libraries

Fonts

Analytics

Tag Managers

SEO Analysis

C64/100

eui.eueui.eu

European University Institute

We are the European University Institute EUI, the leading institute in Europe dedicated to social sciences and humanities

Title Length29 chars

Recommended: 50-60 chars

Description Length122 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

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Crawlability

Sitemap

Type: standard

3,286 URLs

robots.txt

Sponsored

Security Score

51%Poor

Interactive

HTTPS

No WAF

277d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

21.11.2025

Valid Until

21.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.eui.eueui.eu

SHA-256 Fingerprint

35:8F:60:44:61:BB:24:43:5E:E1:02:6E:7C:9F:82:7E:2D:8F:51:0F...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

⚪ Custom()

content-encoding

📦 Gzip(gzip)

content-length

17795

content-type

text/html; charset=utf-8

date

Mon, 16 Feb 2026 15:16:06 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

eui-eu.mail.protection.outlook.com

Domain Information

eui.eu

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

Inter + sans-serif

82/100

Readability

/30

40/40

18px · LH 1.65

Hierarchy

/20

15/25

1.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Inter

Sans24px

Body Font

sans-serif

Sans18px

Contrast Ratio

Reading Comfort

~43 CPL

Needs attention

24px

48px

24px

18px

Major Second

Scale

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

✅ Optimal line spacing: 1.65 ratio ensures comfortable reading.

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

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ 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

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

18 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(8)googletagmanager.com(2)kit.fontawesome.com(1)

Website Identity

Facebook X (Twitter)Instagram YouTube Bluesky

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Last analyzed: 17 Feb 2026 at 09:10

Historical Analysis & Change Tracking