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

berlin.de

https://berlin.de· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

berlin.de

Mobile

Sponsored

Hosting Provider

SysEleven GmbH

IP Address

109.68.230.145

Server Location

🇩🇪 Berlin, Germany

ASN

AS25291

Organization

SysEleven GmbH

Nameservers

ns-391.awsdns-48.com.ns-931.awsdns-52.net.ns-1460.awsdns-54.org.ns-1719.awsdns-22.co.uk.

Performance

Page Speed

1.6 MB

40 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

SysEleven GmbH

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

4 Technologies Detected

Libraries

CSS Frameworks

Icon Libraries

SEO Analysis

C64/100

berlin.deberlin.de

Berlin - Offizielles Stadtportal der Hauptstadt Deutschlands – Berl...

Die offizielle Website der Stadt Berlin. Interessante Informationen für alle Berlinerinnen, Berliner und Touristen.

Title truncated.

Title Length72 chars

Recommended: 50-60 chars

Description Length115 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

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Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

No WAF

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

24.11.2025

Valid Until

22.02.2026

Subject Alternative Names (8)

*.berlin.de*.berlinonline.de*.berlinonline.net*.prod.kube11.berlinonline.net*.service.berlin.de*.styleguide.berlin.deberlin.deberlinonline.net

SHA-256 Fingerprint

1B:46:98:9C:F8:C3:E1:30:60:AD:80:79:7B:D4:D7:1E:86:3A:3C:A2...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

content-encoding

📦 Gzip(gzip)

content-length

7967

content-security-policy

default-src 'self' 'unsafe-inline' 'unsafe-eval' mediastream...

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mailin.berlin.de

secondary.snafu.de

Domain Information

berlin.de

Last Updated

13.03.2025

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Arial

77/100

Readability

/30

32/40

20px · LH 1.20

Hierarchy

/20

15/25

1.35x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Arial

Sans27px

Body Font

Arial

Sans20px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

27px

22px

17px

20px

✅ Excellent readability: 20px body text is ideal for all devices.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

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

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

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 52 elements lack adequate spacing.

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)berlin.de(1)

Website Identity

Facebook Instagram Bluesky

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Last analyzed: 12 Feb 2026 at 14:29

Historical Analysis & Change Tracking