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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wien.info

https://wien.info· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

wien.info

Mobile

Sponsored

Hosting Provider

Babiel GmbH

IP Address

46.243.121.192

Server Location

🇩🇪 Düsseldorf, Germany

ASN

AS198913

Organization

Babiel GmbH

Nameservers

acns02.xaas.systems.acns01.xaas.systems.acns04.xaas.systems.acns03.xaas.systems.+1 more

Performance

Page Speed

4 MB

72 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Babiel GmbH

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

12 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Matomo

Advertising

Google Ads LinkedIn Ads Pinterest Tag TikTok Pixel

Libraries

CSS Frameworks

Icon Libraries

Fonts

SEO Analysis

A88/100

wien.infowien.info

Vienna’s online travel guide: the latest information and services -...

Official online travel guide for the city of Vienna: attractions, events, hotels, Vienna City Card & much more ➔ All the information & services!

Title truncated.

Title Length79 chars

Recommended: 50-60 chars

Description Length144 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

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Crawlability

Sitemap

Type: index

12 URLs

robots.txt

44 rules

Sitemap reference found

Sponsored

Security Score

56%Poor

Interactive

HTTPS

No WAF

193d

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

HTTP Protocol

HTTP/2

Valid From

29.07.2025

Valid Until

29.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.wien.infowien.info

SHA-256 Fingerprint

8F:99:C1:9F:13:CE:4E:44:CC:B4:B3:D5:DE:43:7B:7E:86:31:C7:C3...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

cache-control

🟡 60s(max-age=60)

content-encoding

📦 Gzip(gzip)

content-language

en-US

content-length

29669

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mailport2.wien.info

mailport1.wien.info

Domain Information

wien.info

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

Graphik Web

54/100

Readability

/30

25/40

84px · LH 1.00

Hierarchy

/20

8/25

0.57x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Graphik Web

Sans48px

Body Font

Graphik Web

Sans84px

Contrast Ratio

Reading Comfort

~31 CPL

Needs attention

48px

84px

21px

84px

Minor Second

Scale

✅ Excellent readability: 84px body text is ideal for all devices.

⚠️ Tight line spacing (1.00). 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 1 font families keeps load times fast.

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

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Matomo (Piwik)Mid-Market

Google Tag ManagerFree

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

tracking.wien.info(1)cdn.cookielaw.org(1)local(1)

Website Identity

Facebook X (Twitter)Instagram TikTok

Sponsored

Last analyzed: 17 Feb 2026 at 22:14

Historical Analysis & Change Tracking