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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uni-kassel.de

https://uni-kassel.de· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

uni-kassel.de

Sponsored

Hosting Provider

Universitaet Kassel

IP Address

141.51.95.12

Server Location

🇩🇪 Kassel, Germany

ASN

AS680

Organization

Universitaet Kassel

Server

Apache

Nameservers

dns-3.dfn.de.dns-2.dfn.de.pm8-4.its.uni-kassel.de.pm8-3.its.uni-kassel.de.+1 more

Performance

Page Speed

3.2 MB

31 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

CMS

TYPO3

Infrastructure

Hosting

Universitaet Kassel

Technology Stack

5 Technologies Detected

CSS Frameworks

Libraries

Analytics

Web Servers

SEO Analysis

D58/100

uni-kassel.deuni-kassel.de

Startseite - UNI

Beginne einen neuen Lebensabschnitt: Komm in die documenta-Stadt Kassel. Studiere an einer jungen Uni. Hier ist viel in Bewegung. HEUTE FÜR MORGEN: Natur, Te...

Description truncated.

Title Length16 chars

Recommended: 50-60 chars

Description Length185 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (15/21)

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

robots.txt

18 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

76%Good

Interactive

HTTPS

No WAF

252d

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

28.10.2025

Valid Until

28.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (6)

www.uni-kassel.deuni-kassel.devm95-13.its.uni-kassel.devm95-10.its.uni-kassel.devm95-11.its.uni-kassel.devm95-12.its.uni-kassel.de

SHA-256 Fingerprint

64:03:ED:1B:D1:C9:1D:42:04:F3:5A:7A:59:BD:DD:69:D2:F4:18:CE...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(private, no-store, max-age=0)

content-encoding

📦 Gzip(gzip)

content-language

de-DE

content-security-policy

script-src 'self' data: 'unsafe-eval' veranstaltung...

content-type

text/html;charset=utf-8

date

Tue, 17 Feb 2026 11:44:06 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (4)

mx2.its.uni-kassel.de

mx3.its.uni-kassel.de

mx1.its.uni-kassel.de

mx4.its.uni-kassel.de

Domain Information

uni-kassel.de

Last Updated

10.03.2017

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Notice (WP)

Cookie Consent Banner

Cookie Notice (WP)

GDPR Indicators

Cookie consent banner detected

CMP: Cookie Notice (WP)

Typography & Readability

roboto + roboto-regular

68/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

18/25

2.5x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

roboto

Sans40px

Body Font

roboto-regular

Sans16px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

40px

36px

18px

16px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

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

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

⚠️ Risky: Text appears on background images without overlay protection.

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

4 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)stats3.uni-kassel.de(1)

Website Identity

Facebook

Sponsored

Last analyzed: 17 Feb 2026 at 11:44

Historical Analysis & Change Tracking