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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bundesnetzagentur.de

https://bundesnetzagentur.de· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

Sponsored

Hosting Provider

Bundesnetzagentur fuer Elektrizitaet, Gas, Telekommunikation, Post und Eisenbahnen

IP Address

194.156.220.33

Server Location

🇩🇪 Karlsruhe, Germany

ASN

AS8881

Organization

Bundesnetzagentur fuer Elektrizitaet, Gas, Telekommunikation, Post und Eisenbahnen

CDN

Varnish

Nameservers

dns2.bundesnetzagentur.de.dns1.bundesnetzagentur.de.ns03.versatel.de.dns1.dataforest.net.

Performance

Page Speed

5.4 MB

109 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

Infrastructure

Hosting

Bundesnetzagentur fuer Elektrizitaet, Gas, Telekommunikation, Post und Eisenbahnen

CDN

Varnish

Technology Stack

5 Technologies Detected

Libraries

CSS Frameworks

Other

SEO Analysis

C64/100

bundesnetzagentur.debundesnetzagentur.de

Bundesnetzagentur - Startseite

Bundesnetzagentur informiert: Aktuelle Informationen und Service-Angebote

Title Length32 chars

Recommended: 50-60 chars

Description Length74 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

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Sponsored

Security Score

46%Poor

Interactive

HTTPS

No WAF

36d

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

24.12.2025

Valid Until

24.03.2026

Subject Alternative Names (20)

bnetza.debundesnetzagentur.dedigitalclusterbonn.dedigitalservicescoordinator.dedsc.bund.deelektronische-vertrauensdienste.comelektronische-vertrauensdienste.deelektronische-vertrauensdienste.eu+12 more

SHA-256 Fingerprint

2A:4A:1C:F5:EB:B2:C6:06:94:EE:16:C0:57:A9:FC:85:9B:53:4D:C5...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

cache-control

🔴 No Cache(no-cache)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-language

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

vmail1.bnetza.de

vmail2.bnetza.de

Domain Information

bundesnetzagentur.de

Last Updated

12.11.2025

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

BundesSansWeb + BundesSansWebBold

24/100

Readability

/30

10/40

12px · LH --

Hierarchy

/20

11/25

0.83x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

BundesSansWeb

Sans10px

Body Font

BundesSansWebBold

Sans12px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

10px

12px

Minor Third

Scale

❌ Critical: 12px body text is too small. Increase to at least 14px.

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

✅ Good performance: Using 2 font families keeps load times fast.

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

⚠️ Cramped layout: 28 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(11)SiteGlobals(8)_tools(1)

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Last analyzed: 16 Feb 2026 at 17:45

Historical Analysis & Change Tracking