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

merckgroup.com

https://merckgroup.com· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

merckgroup.com

Mobile

Sponsored

Hosting Provider

froxlor GmbH

IP Address

185.123.52.199

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS207048

Organization

froxlor GmbH

CDN

Fastly

Nameservers

ns01.brandshelter.com.ns02.brandshelter.net.

Performance

Page Speed

7.9 MB

47 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Adobe Experience Manager

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Foundation

Social

ShareThis

SEO Analysis

A88/100

merckgroup.commerckgroup.com

English Home - Merck Group

Merck KGaA, Darmstadt, Germany, a leading science and technology company, operates across Healthcare, Life Science and Electronics.

Title Length26 chars

Recommended: 50-60 chars

Description Length131 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Sponsored

Security Score

86%Very Good

Interactive

HTTPS

WAF

189d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

Valid From

02.09.2025

Valid Until

25.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

www.merckgroup.comactivatecuriosity.emdgroup.combeta-hcp.merckgroup.combrand-hub-backend.emdgroup.combrand-hub-frontend.emdgroup.combrand-hub.emdgroup.comdev.cloud.brand-hub.emdgroup.comdev.cloud.brand-hub.merckgroup.com+12 more

SHA-256 Fingerprint

25:EE:C8:C0:BE:93:CF:D9:86:A4:3C:56:F2:33:04:92:5D:27:EE:2D...

Upgrade to view header details

HTTP Headers

Developer Console

x-frame-options

SAMEORIGIN

referrer-policy

no-referrer-when-downgrade

last-modified

Tue, 17 Feb 2026 07:01:44 GMT

accept-ranges

bytes

x-vhost

merckgroup

content-security-policy

frame-ancestors 'self';

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mxa-005f4802.gslb.pphosted.com

mxb-005f4802.gslb.pphosted.com

Domain Information

merckgroup.com

Domain Age

25y 10m

Created

14.04.2000

Expires

14.04.2026

Last Updated

19.12.2025

Registrar

Key-Systems GmbH

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Data Protection Officer mentioned

Typography & Readability

MS Gothic + Arial

85/100

Readability

/30

40/40

16px · LH 1.46

Hierarchy

/20

18/25

4.5x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

MS Gothic

Sans72px

Body Font

Arial

Sans16px

Contrast Ratio

Reading Comfort

~64 CPL

Optimal (45–75)

72px

32px

16px

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

✅ Optimal line spacing: 1.46 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.5x larger than body text.

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

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

✅ Optimal line length: ~64 characters per line is comfortable to read.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Social Media

ShareThisFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(13)merckgroup.com(1)download.digiaccess.org(1)

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Last analyzed: 17 Feb 2026 at 13:00

Historical Analysis & Change Tracking