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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tuwien.at

https://tuwien.at· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

tuwien.at

Sponsored

Hosting Provider

Technische Universitat Wien

IP Address

128.130.35.76

Server Location

🇦🇹 Vienna, Austria

ASN

AS679

Organization

Technische Universitat Wien

Nameservers

ns10.univie.ac.at.ns5.univie.ac.at.

Performance

Page Speed

1.6 MB

25 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

TYPO3

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

3 Technologies Detected

Libraries

jQuery

CSS Frameworks

Tailwind CSS

Analytics

Matomo

SEO Analysis

B76/100

tuwien.attuwien.at

Technische Universität Wien | TU Wien

Homepage der Technischen Universität Wien. TU Wien, TUW. "Technik für Menschen". News. Alles zu: Studium, Forschung, Kooperationen, Services.

Title Length37 chars

Recommended: 50-60 chars

Description Length141 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

25 URLs

robots.txt

10 rules

Sitemap reference found

Sponsored

Security Score

56%Poor

Interactive

HTTPS

No WAF

103d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

02.06.2025

Valid Until

02.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (18)

tuwien.attechnischeuniversitaet.wienxn--technische-universitt-p2b.wienwww.technik.wientu-wien.atwww.xn--technische-universitt-p2b.wienwww.tuwien.atwww.tu-wien.at+10 more

SHA-256 Fingerprint

A8:E4:13:6B:17:8D:2C:44:66:23:5B:84:22:39:8C:5E:62:11:61:50...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 7 Hours(max-age=27157, private)

content-encoding

📦 Gzip(gzip)

content-language

de-DE

content-length

35648

content-type

text/html; charset=utf-8

date

Thu, 19 Feb 2026 15:27:23 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (3)

mri3.tuwien.ac.at

mri2.tuwien.ac.at

mri1.tuwien.ac.at

Domain Information

tuwien.at

Registrar

Ledl.net GmbH & Co. KG ( https://nic.at/registrar/32 )

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

PTSans + Roboto

85/100

Readability

/30

32/40

15px · LH 1.67

Hierarchy

/20

25/25

4.8x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

PTSans

Sans72px

Body Font

Roboto

Sans15px

Contrast Ratio

Reading Comfort

~44 CPL

Needs attention

72px

32px

15px

⚠️ Small text: 15px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.67 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.8x 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.

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)

Website Identity

Facebook Instagram YouTube Bluesky

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Last analyzed: 19 Feb 2026 at 15:27

Historical Analysis & Change Tracking