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

tue.nl

https://tue.nl· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

tue.nl

Mobile

Sponsored

Hosting Provider

Technische Universiteit Eindhoven

IP Address

131.155.10.135

Server Location

🇳🇱 's-Hertogenbosch, The Netherlands

ASN

AS1161

Organization

Technische Universiteit Eindhoven

Nameservers

ns01.tue.nl.ns02.tue.nl.

Performance

Page Speed

315 KB

83 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

TYPO3

Technology Stack

8 Technologies Detected

CSS Frameworks

Analytics

Libraries

Other

Tag Managers

Advertising

SEO Analysis

B78/100

tue.nltue.nl

Eindhoven University of Technology

Eindhoven University of Technology (TU/e) is a research university specializing in engineering science & technology.

Title Length34 chars

Recommended: 50-60 chars

Description Length116 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (17/19)

2 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

29 rules

Sitemap reference found

Sponsored

Security Score

61%Fair

Interactive

HTTPS

No WAF

63d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

ZeroSSL

Key Algorithm

RSA (2048 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

17.01.2026

Valid Until

17.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.tue.nl

SHA-256 Fingerprint

7A:1E:84:F5:F0:15:0C:D7:BB:18:79:35:B7:4E:00:96:EF:D3:B2:92...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

13071

cache-control

🔴 No Cache(no-cache)

content-encoding

⚡ Brotli(br)

content-language

content-type

text/html; charset=utf-8

date

Fri, 13 Feb 2026 02:18:14 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

tue-nl.mail.protection.outlook.com

Domain Information

tue.nl

Domain Age

38y 7m

Created

02.07.1987

Last Updated

04.02.2026

Registrar

Technische Universiteit Eindhoven

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Legitimate interest basis mentioned

Typography & Readability

Gilroy + sans-serif

82/100

Readability

/30

32/40

15px · LH 1.60

Hierarchy

/20

25/25

3.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Gilroy

Sans50px

Body Font

sans-serif

Sans15px

Contrast Ratio

Reading Comfort

Dual Sans-Serif

left aligned

50px

24px

17px

15px

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

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.3x 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.

⚠️ Cramped layout: 6 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

LinkedIn AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

29 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(10)googletagmanager.com(3)cse.google.com(3)consent.cookiebot.com(2)snap.licdn.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube Bluesky

Sponsored

Last analyzed: 13 Feb 2026 at 02:18

Historical Analysis & Change Tracking