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

taz.de

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

Export

taz.de

Mobile

Sponsored

Hosting Provider

TAZ

IP Address

193.104.220.23

Server Location

🇩🇪 Berlin, Germany

ASN

AS16075

Organization

TAZ

Server

Nginx

Nameservers

osiris.taz.de.tazns01.lwlcom.net.

Performance

Page Speed

1.5 MB

114 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

Alpine.js

Styling

Tailwind CSS

Infrastructure

Hosting

TAZ

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

9 Technologies Detected

Analytics

Frameworks

Meta Frameworks

Libraries

UI Components

CSS Frameworks

Advertising

Web Servers

SEO Analysis

A82/100

taz.detaz.de

taz.de | taz.de

Kritischer, unabhängiger Journalismus der linken Nachrichtenseite taz: Analysen, Hintergründe, Kommentare, Interviews, Reportagen. Genossenschaft seit 1992.

Title Length15 chars

Recommended: 50-60 chars

Description Length156 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

516 URLs

robots.txt

11 rules

Sitemap reference found

Sponsored

Security Score

71%Good

Interactive

HTTPS

No WAF

51d

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)

atlas-der-globalisierung.deatlas.monde-diplomatique.deblog.taz.deblogs.taz.debuchmesse.taz.dedownload.taz.deeuropesfarright.eufuturzwei.taz.de+12 more

SHA-256 Fingerprint

8D:FA:3F:2A:7A:E7:E7:07:60:28:11:18:DF:F0:38:14:42:D4:DA:00...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors 'self' https://*.taz.de https://taz.de https...

content-type

text/html; charset=utf-8

date

Thu, 12 Feb 2026 23:21:58 GMT

expires

Fri, 22 Sep 1978 00:00:01 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

isis.taz.de

prime.taz.de

Domain Information

taz.de

Last Updated

17.04.2018

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

AktivGrotesk_Bd + Times New Roman

61/100

Readability

/30

30/40

16px · LH --

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

AktivGrotesk_Bd

Sans

Body Font

Times New Roman

Serif16px

Contrast Ratio

Reading Comfort

~40 CPL

Needs attention

25px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

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

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 199 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(3)data-502d5cce76.taz.de(2)cdn.privacy-mgmt.com(2)securepubads.g.doubleclick.net(2)taz.de(1)

Website Identity

Instagram Mastodon Bluesky

Sponsored

Last analyzed: 12 Feb 2026 at 23:22

Historical Analysis & Change Tracking