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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rnd.de

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

Export

rnd.de

Sponsored

Hosting Provider

Verlagsgesellschaft Madsack GmbH & Co

IP Address

193.30.60.245

Server Location

🇩🇪 Hanover, Germany

ASN

AS3209

Organization

Verlagsgesellschaft Madsack GmbH & Co

Server

OpenResty

Nameservers

ns0.niedersachsen.com.pns.dtag.de.secondary006.dtag.net.

Performance

Page Speed

590 KB

37 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

React

Infrastructure

Hosting

Verlagsgesellschaft Madsack GmbH & Co

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

6 Technologies Detected

Frameworks

Meta Frameworks

CSS Frameworks

Tag Managers

Web Servers

Customer Support

SEO Analysis

A+94/100

rnd.dernd.de

RND - Aktuelle Nachrichten, News, Hintergründe & Videos

Aktuelle Nachrichten und Informationen aus Politik, Wirtschaft, Sport, Kultur, Unterhaltung, Ratgeber und mehr finden Sie auf RND.de.

Title Length55 chars

Recommended: 50-60 chars

Description Length134 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

33 rules

Sponsored

Security Score

76%Good

Interactive

HTTPS

No WAF

71d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

29.01.2026

Valid Until

29.04.2026

Subject Alternative Names (20)

dev-fusion.rnd.dedev-one.dieharke.dedev-one.dnn.dedev-one.gnz.dedev-one.goettinger-tageblatt.dedev-one.haz.dedev-one.kn-online.dedev-one.landeszeitung.de+12 more

SHA-256 Fingerprint

A7:EF:AD:F0:BE:B7:CC:6C:D1:92:BE:E3:A4:61:1D:64:50:E8:4B:12...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ch

Sec-CH-UA,Sec-CH-UA-Mobile,Sec-CH-UA-Platform,Sec-CH-UA-Arch...

arc-country

cache-control

🟡 60s(private, max-age=60)

content-encoding

📦 Gzip(gzip)

content-length

82942

content-security-policy

upgrade-insecure-requests

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

rnd-de.mail.protection.outlook.com

Domain Information

rnd.de

Last Updated

31.05.2023

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Times New Roman + sans-serif

32/100

Readability

/30

24/40

14px · LH 1.29

Hierarchy

/20

8/25

0.71x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Times New Roman

Serif10px

Body Font

sans-serif

Sans14px

Contrast Ratio

Reading Comfort

~40 CPL

Needs attention

10px

18px

16px

14px

Major Second

Scale

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

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

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

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

⚠️ Cramped layout: 169 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(8)cmp-sp.rnd.de(2)mst.rnd.de(1)click-performance.assets.rndtech.de(1)

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Last analyzed: 16 Feb 2026 at 23:12

Historical Analysis & Change Tracking