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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denic.de

https://denic.de· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

denic.de

Mobile

Sponsored

Hosting Provider

DENIC eG

IP Address

81.91.170.12

Server Location

🇩🇪 Munich, Germany

ASN

AS8763

Organization

DENIC eG

CDN

Varnish

Nameservers

ns1.denic.de.ns3.denic.de.ns2.denic.de.ns4.denic.net.

Performance

Page Speed

1.1 MB

46 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

Alpine.js

Styling

Tailwind CSS

CMS

TYPO3

Infrastructure

Hosting

DENIC eG

CDN

Varnish

Technology Stack

4 Technologies Detected

Frameworks

CSS Frameworks

Analytics

Security

SEO Analysis

B76/100

denic.dedenic.de

DENIC eG: DENIC – Registrierungsstelle für alle .de Domains

Als Registry verwaltet DENIC alle .de-Domains und stellt sicher, dass sie jederzeit erreichbar sind.

Title Length59 chars

Recommended: 50-60 chars

Description Length100 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1 URLs

robots.txt

Sponsored

Security Score

86%Very Good

Interactive

HTTPS

No WAF

49d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

05.01.2026

Valid Until

05.04.2026

Subject Alternative Names (20)

*.25-jahre-denic.de*.25-years-denic.de*.adm.denic.de*.ams1.adm.denic.de*.ams1.prod.denic.de*.beta.denic.de*.celebrate-25years.de*.cloud.denic.de+12 more

SHA-256 Fingerprint

78:1B:5A:84:CC:2B:AB:36:67:A4:DD:C6:7C:A3:26:4B:D5:DF:16:79...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

cache-control

🟡 0s(max-age=0, s-maxage=28037)

content-encoding

📦 Gzip(gzip)

content-language

de-DE

content-length

42713

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (3)

mxext1.mailbox.org

mxext2.mailbox.org

mxext3.mailbox.org

Domain Information

denic.de

Last Updated

19.12.2024

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

Plus Jakarta Sans

60/100

Readability

/30

32/40

14px · LH 1.50

Hierarchy

/20

25/25

4.29x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Plus Jakarta Sans

Sans60px

Body Font

Plus Jakarta Sans

Sans14px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

60px

24px

20px

14px

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.3x 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

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

6 Resources

Scripts

Styles

Async

Defer

Top Script Sources

denic.de(1)local(1)

Website Identity

X (Twitter)Instagram LinkedIn Bluesky

Sponsored

Last analyzed: 15 Feb 2026 at 02:37

Historical Analysis & Change Tracking