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

otto.de

https://otto.de· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

otto.de

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

18.184.19.146

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS16509

Organization

AWS EC2 (eu-central-1)

CDN

Varnish

Nameservers

ns7-66.akam.net.ns1-193.akam.net.ns2-65.akam.net.ns4-67.akam.net.

Performance

Page Speed

728 KB

250 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

Svelte

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

Varnish

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

4 Technologies Detected

Frameworks

Meta Frameworks

CSS Frameworks

Customer Support

SEO Analysis

B76/100

otto.deotto.de

OTTO - Mode, Möbel & Technik » Zum Online-Shop

OTTO Online-Shop » Viele Marken ✓ Tolle Angebote ✓ Top Service » Ratenkauf ✓ Kauf auf Rechnung ✓ Altgeräte-Mitnahme ✓ Aufbauservice ✓ Jetzt shoppen!

Title Length46 chars

Recommended: 50-60 chars

Description Length148 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

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Crawlability

Sitemap

robots.txt

15 rules

Sponsored

Security Score

66%Fair

Interactive

HTTPS

No WAF

394d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

12.02.2026

Valid Until

15.03.2027

OCSP Stapling

Enabled

Subject Alternative Names (4)

www.otto.depxc.otto.dets.otto.deotto.de

SHA-256 Fingerprint

9D:85:D5:26:E0:21:F4:82:C3:9F:C3:3B:2B:6C:2B:6E:C3:78:75:07...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ch

Sec-CH-UA, Sec-CH-UA-Mobile, Sec-CH-UA-Full-Version-List, Se...

age

cache-control

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

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors 'self' https://*.otto.de https://*.ottogroup...

content-type

text/html

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

otto-de.mail.protection.outlook.com

Domain Information

otto.de

Last Updated

07.03.2025

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

OTTOSans + OttoIcons

61/100

Readability

/30

25/40

24px · LH 1.17

Hierarchy

/20

15/25

1x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

OTTOSans

Sans24px

Body Font

OttoIcons

Sans24px

Contrast Ratio

Reading Comfort

~44 CPL

Needs attention

24px

48px

16px

24px

Minor Third

Scale

✅ Excellent readability: 24px body text is ideal for all devices.

⚠️ Tight line spacing (1.17). Consider 1.4-1.6 for better readability.

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

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

⚠️ Cramped layout: 20 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

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Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

static.otto.de(12)local(7)otto.de(1)

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Last analyzed: 14 Feb 2026 at 14:06

Historical Analysis & Change Tracking