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-osnabrueck.de

https://uni-osnabrueck.de· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

uni-osnabrueck.de

Sponsored

Hosting Provider

UOS

IP Address

131.173.17.203

Server Location

🇩🇪 Osnabrück, Germany

ASN

AS680

Organization

UOS

Server

Nginx

CDN

Proxy Cache

Nameservers

dns-3.serv.uni-osnabrueck.de.dns-2.serv.uni-osnabrueck.de.dns-1.serv.uni-osnabrueck.de.

Performance

Page Speed

2.6 MB

22 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

TYPO3

Technology Stack

4 Technologies Detected

CSS Frameworks

Analytics

Web Servers

Languages

SEO Analysis

C64/100

uni-osnabrueck.deuni-osnabrueck.de

Universität Osnabrück: Gut studieren und leben!: Uni Osnabrück

Die Universität Osnabrück ist eine Hochschule mit breitem Studienangebot in den Bereichen Wirtschaftswissenschaften, Jura, Geisteswissenschaften, Sozialwisse...

Description truncated.

Title Length62 chars

Recommended: 50-60 chars

Description Length285 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

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Crawlability

Sitemap

Type: index

1 URLs

robots.txt

8 rules

Sitemap reference found

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

294d

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

11.12.2025

Valid Until

11.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.uni-osnabrueck.de

SHA-256 Fingerprint

B0:53:55:62:33:97:10:E1:42:40:6C:E0:4F:E0:F6:10:95:11:AE:E3...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔵 1 Days(max-age=86400)

content-encoding

📦 Gzip(gzip)

content-language

content-type

text/html; charset=utf-8

date

Thu, 19 Feb 2026 22:33:01 GMT

etag

W/"6629a3a03c07e651bc93578d23db914c"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (3)

b2411.mx.srv.dfn.de

a2411.mx.srv.dfn.de

c2411.mx.srv.dfn.de

Domain Information

uni-osnabrueck.de

Last Updated

06.04.2020

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Signika

84/100

Readability

/30

40/40

18px · LH 1.52

Hierarchy

/20

21/25

2.84x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Signika

Sans51px

Body Font

Signika

Sans18px

Contrast Ratio

Reading Comfort

~38 CPL

Needs attention

51px

38px

25px

18px

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

✅ Optimal line spacing: 1.52 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.8x larger than 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.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

6 Resources

Scripts

Styles

Async

Defer

Top Script Sources

uni-osnabrueck.de(2)local(2)matomo.rz.uni-osnabrueck.de(1)

Website Identity

Facebook Instagram YouTube

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Last analyzed: 19 Feb 2026 at 22:33

Historical Analysis & Change Tracking