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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ntua.gr

https://ntua.gr· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

ntua.gr

Sponsored

Hosting Provider

National Technical University of Athens

IP Address

147.102.224.101

Server Location

🇬🇷 Néa Erythraía, Greece

ASN

AS3323

Organization

National Technical University of Athens

Server

Apache

Nameservers

ulysses.noc.ntua.gr.sns1.grnet.gr.achilles.noc.ntua.gr.sns0.grnet.gr.+1 more

Performance

Page Speed

11 MB

126 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

Frontend

Framework

jQuery

Styling

Bootstrap

API

Data Source

Headless CMS

Directus

Infrastructure

Hosting

National Technical University of Athens

Detected API Sources

/media/k2/items/cache/7c1c9aa0...

Technology Stack

12 Technologies Detected

Libraries

CSS Frameworks

Icon Libraries

Font Awesome Material Icons

Analytics

Fonts

Web Servers

Languages

Customer Support

SEO Analysis

F29/100

ntua.grntua.gr

ΕΘΝΙΚΟ ΜΕΤΣΟΒΙΟ ΠΟΛΥΤΕΧΝΕΙΟ

No description available for this page.

Title Length27 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1

8 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

15 rules

Sponsored

Security Score

71%Good

Static / Informational

HTTPS

No WAF

295d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

09.12.2025

Valid Until

09.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

ntua.grwww.ntua.gr

SHA-256 Fingerprint

4A:67:2E:2D:90:6C:F8:49:20:01:83:EA:DE:DC:6D:64:51:8B:A6:B4...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, post-check=0, pre-check...)

connection

Keep-Alive

content-type

text/html; charset=utf-8

date

Mon, 16 Feb 2026 14:43:29 GMT

expires

Wed, 17 Aug 2005 00:00:00 GMT

keep-alive

timeout=5, max=99

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (4)

ulysses.noc.ntua.gr

achilles.noc.ntua.gr

ntua-gr.mail.protection.outlook.com

diomedes.noc.ntua.gr

Domain Information

ntua.gr

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Open Sans

58/100

Readability

/30

32/40

15px · LH 1.80

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Open Sans

Sans

Body Font

Open Sans

Sans15px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

16px

15px

⚠️ Small text: 15px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.80 ratio ensures comfortable reading.

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

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

⚠️ Cramped layout: 14 elements lack adequate spacing.

⚠️ Inconsistent alignment: Mix of left/center/right creates visual noise.

GGoogle Fonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(18)google-analytics.com(2)

Website Identity

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 16 Feb 2026 at 14:43

Historical Analysis & Change Tracking