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

vub.ac.be

https://vub.ac.be· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

vub.ac.be

Sponsored

Hosting Provider

Vrije Universiteit Brussel

IP Address

134.184.255.4

Server Location

🇧🇪 Brussels, Belgium

ASN

AS2611

Organization

Vrije Universiteit Brussel

CDN

Varnish

Nameservers

ns3.vub.ac.be.ns4.vub.ac.be.

Performance

Page Speed

2.4 MB

45 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

9 Technologies Detected

Fonts

Google Fonts Adobe Fonts (Typekit)Adobe Fonts

Libraries

CSS Frameworks

Icon Libraries

Analytics

Tag Managers

Advertising

SEO Analysis

A82/100

vub.ac.bevub.ac.be

VUB Brussels University | Vrije Universiteit Brussel

Study at VUB and help build a sustainable future for our next generations.

Title Length52 chars

Recommended: 50-60 chars

Description Length74 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

3 URLs

robots.txt

60 rules

Sitemap reference found

Sponsored

Security Score

46%Poor

Interactive

HTTPS

No WAF

282d

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

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

26.11.2025

Valid Until

26.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.vub.bevub.be

SHA-256 Fingerprint

26:B0:3D:88:3D:2E:BE:B2:23:09:6C:1A:88:69:AC:27:5B:44:41:F1...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

cache-control

🔴 No Cache(must-revalidate, no-cache, private)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-length

46433

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

vub-ac-be.mail.protection.outlook.com

Domain Information

vub.ac.be

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

itc-avant-garde-gothic-pro + sans-serif

84/100

Readability

/30

32/40

15px · LH 1.60

Hierarchy

/20

25/25

8x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

itc-avant-garde-gothic-pro

Sans120px

Body Font

sans-serif

Sans15px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

120px

40px

50px

14px

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 8.0x larger than body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ 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.

GGoogle Fonts AAdobe Fonts Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

consent.cookiebot.com(3)local(3)consentcdn.cookiebot.com(1)googletagmanager.com(1)

Website Identity

Facebook Instagram YouTube TikTok

Sponsored

Last analyzed: 17 Feb 2026 at 05:39

Historical Analysis & Change Tracking