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

haufe.de

https://haufe.de· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

haufe.de

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

52.51.77.218

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS EC2 (eu-west-1)

Server

Apache

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns1.haufegroup.de.ns2.haufegroup.com.

Performance

Page Speed

402 KB

38 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

Cloudflare

Technology Stack

5 Technologies Detected

Libraries

UI Components

CSS Frameworks

Tag Managers

Web Servers

SEO Analysis

A85/100

haufe.dehaufe.de

Haufe. Intelligenz, die bewegt.

Haufe unterstützt Mitarbeiter und Unternehmen mit Wissen, Tools und Lösungen auch in herausfordernden Zeiten. Jetzt mehr erfahren.

Title Length31 chars

Recommended: 50-60 chars

Description Length130 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

39 rules

Sitemap reference found

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

WAF

139d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

12.06.2025

Valid Until

06.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

haufe.demanagement.live.haufe.dewww.haufe.delive.haufe.de

SHA-256 Fingerprint

E5:4A:69:B4:22:AD:72:E6:1F:9F:C0:B3:A8:96:73:BD:57:CB:D8:1F...

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-credentials

false

age

alt-svc

h3=":443"; ma=86400

cache-control

🟣 Private(private)

cf-cache-status

HIT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (3)

mail.haufe.de

mail2.haufe.de

mail3.haufe.de

Domain Information

haufe.de

Last Updated

21.01.2025

DNSSEC

Not Enabled

Privacy & Compliance

Usercentrics

Cookie Consent Banner

Usercentrics

GDPR Indicators

Cookie consent banner detected

CMP: Usercentrics

Data Protection Officer mentioned

Typography & Readability

Abcfavorit

81/100

Readability

/30

40/40

18px · LH 1.50

Hierarchy

/20

18/25

3.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Abcfavorit

Sans60px

Body Font

Abcfavorit

Sans18px

Contrast Ratio

Reading Comfort

~31 CPL

Needs attention

60px

46px

18px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.3x 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

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

10 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.prod.website-files.com(3)app.usercentrics.eu(2)wwi.haufe.de(1)d3e54v103j8qbb.cloudfront.net(1)cdn.haufe.de(1)

Website Identity

haufe.de

Social Profiles

Facebook

Sponsored

Last analyzed: 17 Feb 2026 at 12:41

Historical Analysis & Change Tracking