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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sennheiser.com

https://sennheiser.com· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

sennheiser.com

Mobile

Sponsored

Hosting Provider

Episerver Stockholm

IP Address

217.114.94.2

Server Location

🇸🇪 Stockholm, Sweden

ASN

AS30811

Organization

Episerver Stockholm

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns1.lemarit.de.ns1.lemarit.net.ns3.lemarit.de.ns2.lemarit.de.+1 more

Performance

Page Speed

1.3 MB

79 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Next.js

CMS

Weebly

Infrastructure

Hosting

Episerver Stockholm

CDN

Cloudflare

Technology Stack

10 Technologies Detected

CSS Frameworks

Analytics

Meta Frameworks

Tag Managers

Customer Support

Other

CDN

Security

SEO Analysis

A84/100

sennheiser.comsennheiser.com

Sennheiser — Headphones, Microphones, Wireless Systems

For over 75 years, our products come with a built-in mission: to stay true to the sound and soul the music was given by its artist.

Title Length54 chars

Recommended: 50-60 chars

Description Length131 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (30/49)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

5 rules

Sitemap reference found

Sponsored

Security Score

56%Poor

Interactive

HTTPS

WAF

49d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

04.01.2026

Valid Until

04.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.sennheiser.com

SHA-256 Fingerprint

0D:D5:D2:0C:36:4F:4E:BE:BC:16:EA:C5:97:7D:8D:17:04:A7:C4:2B...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cd6d4a95f50d242-FRA

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors 'self'

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

sennheiser-com.mail.protection.outlook.com

Domain Information

sennheiser.com

Domain Age

29y 10m

Created

24.04.1996

Expires

25.04.2026

Last Updated

26.04.2025

Registrar

COREhub, S.R.L.

DNSSEC

Not Enabled

Privacy & Compliance

Usercentrics

Cookie Consent Banner

Usercentrics

GDPR Indicators

Cookie consent banner detected

CMP: Usercentrics

Data Protection Officer mentioned

Typography & Readability

sennheiserFont

75/100

Readability

/30

32/40

20px · LH 1.20

Hierarchy

/20

20/25

1.6x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

sennheiserFont

Sans32px

Body Font

sennheiserFont

Sans20px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

32px

13px

20px

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

✅ Good hierarchy: Clear distinction between headlines and body text.

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

✅ Consistent design: Single font family with weight variations is a modern best practice.

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

⚠️ Cramped layout: 36 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Customer Support

ZendeskEnterprise

Live chat and helpdesk tools

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

A/B Testing & Optimization

OptimizelyEnterprise

Experimentation and conversion optimization

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(20)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube TikTok

Sponsored

Last analyzed: 13 Feb 2026 at 19:46

Historical Analysis & Change Tracking