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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thieme-connect.de

https://thieme-connect.de· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

thieme-connect.de

Mobile

Sponsored

Hosting Provider

FIZ Karlsruhe - Leibniz Institute Information Infrastructure

IP Address

141.66.193.70

Server Location

🇩🇪 Eggenstein-Leopoldshafen, Germany

ASN

AS13040

Organization

FIZ Karlsruhe - Leibniz Institute Information Infrastructure

Server

AmazonS3

CDN

CloudFront

Nameservers

ns.udag.net.ns.udag.de.ns.udag.org.

Performance

Page Speed

1.4 MB

30 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

Infrastructure

Hosting

FIZ Karlsruhe - Leibniz Institute Information Infrastructure

CDN

CloudFront

Technology Stack

1 Technologies Detected

CSS Frameworks

Tailwind CSS

SEO Analysis

B76/100

thieme-connect.dethieme-connect.de

Wen wir unterstützen - Thieme Gruppe

Thieme unterstützt Autor*innen, Jobsuchende, Journalist*innen, Bibliothekar*innen, Buchhändler*innen und viele mehr.

Title Length36 chars

Recommended: 50-60 chars

Description Length116 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

12 rules

Sponsored

Security Score

86%Very Good

Interactive

HTTPS

WAF

215d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

24.08.2025

Valid Until

22.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.thieme.com

SHA-256 Fingerprint

14:63:B8:66:85:EE:C3:11:B3:4C:08:7E:C0:DF:2C:74:D3:2A:07:54...

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 0s(public, max-age=0, s-maxage=120, must-revalidate)

content-encoding

⚡ Brotli(br)

content-security-policy

base-uri 'none'; default-src 'self' data: https: wss: 'unsaf...

content-type

text/html; charset=utf-8

date

Thu, 19 Feb 2026 15:22:47 GMT

etag

W/"940ca170e3544421f9c2d93ce5372ea4"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (3)

mxb.thieme.de

mxa.thieme.de

mx.thieme.de

Domain Information

thieme-connect.de

Last Updated

08.03.2023

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Typography & Readability

Thieme Argo 2023

81/100

Readability

/30

40/40

20px · LH 1.60

Hierarchy

/20

18/25

3x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Thieme Argo 2023

Serif60px

Body Font

Thieme Argo 2023

Sans20px

Contrast Ratio

Reading Comfort

Serif Headlines + Sans Body

left aligned

60px

48px

24px

20px

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

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.0x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

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

⚠️ Cramped layout: 33 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)cdn.cookielaw.org(1)

Website Identity

Facebook Instagram LinkedIn YouTube

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Last analyzed: 19 Feb 2026 at 15:22

Historical Analysis & Change Tracking